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Exam

BIOLOGY
NEET 2023

Cell: The Unit of Life

Which of the following NOT considered as the part of endomembrane system?
A. Mitochondria
B. Endoplasmic Reticulum
C. Chloroplasts
D. Golgi complex
E. Peroxisomes
Choose the most appropriate answer from the options given below:

A
A, C and E only
B
A and D only
C
A, D and E only
D
B and D only

A, C and E only

Locomotion and Movement

Match List I with List II. List – I List – II.
A. Cartilaginous Joint I. Between flat skull bones
B. Ball and Socket Joint II. Between adjacent vertebrae in vertebral column
C. Fibrous Joint III. Between carpal and metacarpal of thumb
D. Saddle Joint IV. Between Humerus and Pectoral girdle
Choose the correct answer from the options given below:

A
A-II, B-IV, C-I, D-III
B
A-I, B-IV, C-III, D-II
C
A-II, B-IV, C-III, D-I
D
A-III, B-I, C-II, D-IV

A-II, B-IV, C-I, D-III

Evolution

Select the correct group/set of Australian Marsupials exhibiting adaptive radiation.

A
Numbat, Spotted cuscus, Flying Phalanger
B
Mole, Flying squirrel, Tasmanian tiger cat
C
Lemur, Anteater, Wolf
D
Tasmanian wolf, Bobcat, Marsupial mole

Numbat, Spotted cuscus, Flying Phalanger

Environmental Issues

Which of the following statements is correct?

A
Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
B
Presence of large amount of nutrients in water restricts ‘Algal Bloom’
C
Algal Bloom decreases fish mortality
D
Eutrophication refers to increase in domestic sewage and waste water in lakes.

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.

Principles of Inheritance and Variation

Which one of the following symbols represents mating between relatives in human pedigree analysis

A
B
C
D

Biotechnology and Its Applications

Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment?

A
Serum and Urine analysis
B
Polymerase Chain Reaction (PCR) technique
C
Enzyme Linked Immuno-Sorbent Assay (ELISA) technique
D
Recombinant DNA Technology

Serum and Urine analysis

Body Fluids and Circulation

Match List I with List II. List – I List – II.
A. P-wave I. Beginning of systole
B. Q – Wave II. Repolarisation of ventricles
C. QRS complex III. Depolarisation of atria
D. T - wave IV. Depolarisation of ventricles
Choose the correct answer from the options given below:

A
A-IV, B-III, C-II, D-I
B
A-II, B-IV, C-I, D-III
C
A-I, B-II, C-III, D-IV
D
A-III, B-I, C-IV, D-II

A-III, B-I, C-IV, D-II

Principles of Inheritance and Variation

Broad palm with single palmcrease is visible in a person suffering from

A
Turner’s syndrome
B
Klinefelter’s syndrome
C
Thalassemia
D
Down’s syndrome

Down’s syndrome

Digestion and Absorption

Match List I with List II.
List – I (Cells) List – II (Secretion)
A. Peptic cells I. Mucus
B. Goblet cells II. Bile juice
C. Oxyntic cells III. Proenzyme pepsinogen
D. Hepatic cells IV. HCl and intrinsic factor for absorption of vitamin B12

A
A-II, B-I, C-III, D-IV
B
A-III, B-I, C-IV, D-II
C
A-II, B-IV, C-I, D-III
D
A-IV, B-III, C-II, D-I

A-III, B-I, C-IV, D-II

Human Reproduction

Which of the following statements are correct regarding female reproductive cycle?
A. In non – primate mammals cyclical changes during reproduction are called oestrus cycle.
B. First menstrual cycle begins at puberty and is called menopause.
C. Lack of menstruation may be indicative of pregnancy.
D. Cyclic menstruation extends between menarche and menopause. Choose the most appropriate answer from the option given below:

A
A and B only
B
A, B and C only
C
A, C and D only
D
A and D only

A, C and D only

Biomolecules

Given below are two statements:
Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.

Statement II: when the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.
In the light of the above statements, choose the correct answer from the options given below.

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Statement I is false but statement II is true
D
Both Statement I and Statement II are true

Both Statement I and Statement II are true

Digestion and Absorption

Once the undigested and unabsorbed substances enter the caecum, their back flow is prevented by

A
Ileo – caecal valve
B
Gastro – oesophageal sphincter
C
Pyloric sphincter
D
Sphincter of Oddi

Ileo – caecal valve

Animal Kingdom

Match List I with List II.
List – I List – II
A. Taenia - I. Nephridia
B. Paramoecium - II. Contractile vacuole
C. Periplaneta - III. Flame cells
D. Pheretima - IV. Urecose gland

A
A-I, B-II, C-IV, D-III
B
A-III, B-II, C-IV, D-I
C
A-II, B-I, C-IV, D-III
D
A-I, B-II, C-III, D-IV

A-III, B-II, C-IV, D-I

Neural Control and Coordination

Match List I with List II with respect to human eye.
List – I List – II
A. Fovea - I. Visible coloured portion of eye that regulates diameter of pupil.
B. Iris - II. External layer of eye formed of dense connective tissue.
C. Blind spot - III. Point of greatest visual acuity or resolution.
D. Sclera - IV. Point where optic nerve leaves the eyeball and photoreceptor cells are absent.
Choose the correct answer from the options given below

A
A-IV, B-III, C-II, D-I
B
A-I, B-IV, C-III, D-II
C
A-II, B-I, C-III, D-IV
D
A-III, B-I, C-IV, D-II

A-III, B-I, C-IV, D-II

Molecular Basis of Inheritance

Given below are two statements:
Statement I: RNA mutates at a faster rate.
Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.
In the light of the above statement, choose the correct answer from the options given below:

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Statement I is false but Statement II is true
D
Both Statement I and Statement II are true

Both Statement I and Statement II are true

Chemical Coordination and Integration

Match List I with List II.
List – I List – II
A. CCK - I. Kidney
B. GIP - II. Heart
C. ANF - III. Gastric gland
D. ADH - IV. Pancreas
Choose the correct answer from the options given below:

A
A-III, B-II, C-IV, D-I
B
A-II, B-IV, C-I, D-III
C
A-IV, B-II, C-III, D-I
D
A-IV, B-III, C-II, D-I

A-IV, B-III, C-II, D-I

Breathing and Exchange of Gases

Vital capacity of lung is ___.

A
IRV + ERV + TV + RV
B
IRV + ERV + TV - RV
C
IRV + ERV + TV
D
IRV + ERV

IRV + ERV + TV

Biotechnology: Principles and Processes

Which of the following is not a cloning vector?

A
YAC
B
pBR322
C
Probe
D
BAC

Probe

Molecular Basis of Inheritance

Match List I with List II.
List – I List – II
A. Gene ‘a’ - I. β – galactosidase
B. Gene ‘y’ - II. Transacetylase
C. Gene ‘i’ - III. Permease
D. Gene ‘z’ - IV. Repressor protein
Choose the correct answer from the options given below:

A
A-II, B-III, C-IV, D-I
B
A-III, B-IV, C-I, D-III
C
A-III, B-I, C-IV, D-II
D
A-II, B-I, C-IV, D-III

A-II, B-III, C-IV, D-I

Human Reproduction

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion (A): Endometrium is necessary for implantation of blastocyst.
Reason (R): In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.
In the light of the above Statement, choose the correct answer from the options given below:

A
Both A and R are true but R is NOT the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true and R is the correct explanation

Both A and R are true but R is NOT the correct explanation of A

Reproductive Health

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion (A): Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care programme.
Reason (R): Ban on amniocentesis checks increasing menace of female foeticide.
In the light of the above statements, choose the correct answer from the option given below:

A
Both A and R true and R is not the correct explanation of A
B
A is true but R is False
C
A is false but R is true
D
Both A and R are true and R is the correct explanation of A

A is false but R is true

Human Health and Diseases

Match List I with List II
List – I List – II
A. Heroin - I. Effect on cardiovascular system
B. Marijuana - II. Slow down body function
C. Cocaine - III. Painkiller
D. Morphine - IV. Interfere with transport of dopamine.
Choose the correct answer from the options given below.

A
A-I, B-II, C-III, D-IV
B
A-IV, B-III, C-II, D-I
C
A-III, B-IV, C-I, D-II
D
A-II, B-I, C-IV, D-III

A-II, B-I, C-IV, D-III

Human Health and Diseases

In which blood corpuscles, the HIV undergoes replication and produces progeny viruses?

A
B-lymphocytes
B
Basophil
C
Eosinophils
D
TH cells

TH cells

Human Health and Diseases

Match List I with List II
List – I List – II
A. Ringworm - I. Haemophilus influenzae
B. Filariasis - II. Trichophyton
C. Malaria - III. Wuchereria bancrofti
D. Pneumonia - IV. Plasmodium vivax
Chose the correct answer from the options given below:

A
A-II, B-III, C-I, D-IV
B
A-III, B-II, C-I, D-IV
C
A-III, B-II, C-IV, D-I
D
A-II, B-III, C-IV, D-I

A-II, B-III, C-IV, D-I

Reproductive Health

Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly?

A
Gonorrhoea
B
Hepatitis-B
C
HIV Infection
D
Genital herpes

Gonorrhoea

Reproductive Health

Match List I with List II
List I List II
A. Vasectomy - I. Oral method
B. Coitus Interruptus - II. Barrier method
C. Cervical caps - III. Surgical method
D. Saheli - IV. Natural method
Choose the correct answer from the options given below:

A
A-II, B-III, C-I, D-IV
B
A-III, B-II, C-I, D-IV
C
A-III, B-II, C-IV, D-I
D
A-II, B-III, C-IV, D-I

A-II, B-III, C-I, D-IV

Animal Kingdom

Radial symmetry is NOT found in adults of phylum _____.

A
Hemichordata
B
Coelenterata
C
Echinodermata
D
Ctenophora

Hemichordata

Biomolecules

Given below are two statements:
Statement I: A protein is imagined as a line, the left and represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal).
Statement II: Adult human haemoglobin, consists of 4 subunits (two subunits of a type and two subunits of B type).
In the light of the above statements, choose the correct answer from the options given below:

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Statement I is false but Statement II is true
D
Both Statement I and Statement II are true

Statement I is false but Statement II is true

Excretory Products and Their Elimination

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion (A): Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex and medulla.
Reason (R): Juxta medullar nephrons have short loop of Henle. Whereas, cortical nephrons have longer loop of Henle.
In the light of the above statements, choose the correct answer from the options given below:

A
Both A and R are true but R is Not the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true R is the correct explanation of A

A is true but R is false

Cell: The Unit of Life

Which of the following function is carried out by cytoskeleton in a cell?

A
Protein synthesis
B
Motility
C
Transportation
D
Nuclear division

Motility

Structural Organisation in Animals

Given below are two statements:
Statement I: Ligaments are dense Irregular tissue.
Statement II: Cartilage is dense regular tissue.
In the light of the above statements, choose the correct answer from the options given below:

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Statement I is false but Statement II is true
D
Both Statement I and Statement II are true

Both Statement I and Statement II are false

Organisms and Population

Match List I with List II List I (Interacting species) List II (Name of interaction) A. A Leopard and a Lion in a forest / grassland I. Competition B. A Cuckoo laying egg in a Crow’s nest II. Brood parasitism C. Fungi and root of a higher plant in Mycorrhizae III. Mutualism D. A cattle egret and a
Cattle in a field IV. Commensalism Choose the correct answer from the options given below:

A
A-I, B-II, C-IV, D-III
B
A-III, B-IV, C-I, D-II
C
A-II, B-III, C-I, D-IV
D
A-I, B-II, C-III, D-IV

A-I, B-II, C-III, D-IV

Human Reproduction

Given below are two statements:
Statement I: Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct.
Statement II: The cavity of the cervix is called cervical canal which along with vagina forms birth canal.
In the light of above statements, choose the correct answer from the options given below:

A
Both Statement I and Statement II are false
B
Statement I is correct but Statement II is false
C
Statement I incorrect and Statement II is true
D
Both Statement I and Statement II are true

Both Statement I and Statement II are true

Environmental Issues

Given below are two statements:
Statement I : Electrostatic precipitator is most widely used in thermal power plant.
Statement II: Electrostatic precipitator in thermal power plant removes ionizing radiations.
In the light of the above statements, choose the most appropriate answer from the options given below:

A
Both Statement I and Statement II are correct
B
Statement I is correct but Statement II is incorrect
C
Statement I is incorrect but Statement II is correct
D
Both Statement I and Statement II are correct

Statement I is correct but Statement II is incorrect

Molecular Basis of Inheritance

Given below are two statements:
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below:

A
Both Statement I and Statement II are false
B
Statement I is correct but Statement II is false
C
Statement I is incorrect but Statement II is true
D
Both Statement I and Statement II are true

Statement I is incorrect but Statement II is true

Chemical Coordination and Integration

Which of the following are NOT under the control of thyroid hormone? A. Maintenance of water and electrolyte balance B. Regulation of basal metabolic rate C. Normal rhythm of sleep-wake cycle D. Development of immune system E. Support the process of R.B.Cs formation. Choose the correct answer from the options given below:

A
B and C only
B
C and D only
C
D and E only
D
A and D only

C and D only

Chemical Coordination and Integration

Which of the following statements are correct?
A. An excessive loss of body fluid from the body switches off osmoreceptors.
B. ADH facilitates water reabsorption to prevent diuresis.
C. ANF causes vasodilation.
D. ADH causes increase in blood pressure.
E. ADH is responsible for decrease in GFR.
Choose the correct answer from the options given below:

A
B, C and D only
B
A, B and E only
C
C, D and E only
D
A and B only

B, C and D only

Structural Organisation in Animals

In cockroach, excretion is brought about by
A. Phallic gland B. Urecose gland C. Nephrocytes D. Fat body E. Collaterial glands

A
A, B and E only
B
B, C and D only
C
B and D only
D
A and E only

B, C and D only

Organisms and Populations

Match List I and List II. List I List II A. Logisticrowth I. Unlimited resource availability condition B. Exponential growth II. Limited resource availability condition C. Expanding age pyramid III. The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups D. Stable age pyramid IV. The percent individuals of prereproductives and reproductive age group are same. Choose the correct answer from the options given below:

A
A-II, B-III, C-I, D-IV
B
A-II, B-IV, C-I, D-III
C
A-II, B-IV, C-III, D-I
D
A-II, B-I, C-III, D-IV

A-II, B-I, C-III, D-IV

Structural Organisation in Animals

Match List I with List II List I List II A. Mast cells I. Ciliated epithelium B. Inner surface of bronchiole II. Areolar connective tissue C. Blood III. Cuboidal epithelium D. Tubular parts of nephron IV. Specialized connective tissue Choose the correct answer from the options given below:

A
A-II, B-III, C-I, D-IV
B
A-II, B-I, C-IV, D-III
C
A-III, B-IV, C-II, D-I
D
A-I, B-II, C-IV, D-III

A-II, B-I, C-IV, D-III

Cell Cycle and Cell Division

Given below are two statements:
Statement I: During G0 phase of cell cycle the cell is metabolically inactive
Statement II: The centrosome undergoes duplication during S phase of interphase.
In the light of the above statements, choose the most appropriate answer from the options given below:

A
Both Statement I and Statement II are incorrect.
B
Statement I is correct but Statement II is incorrect.
C
Statement I is incorrect but Statement II is correct.
D
Both Statement I and Statement II are correct.

Statement I is incorrect but Statement II is correct.

Body Fluids and Circulation

Which of the following statements are correct?
A. Basophils are most abundant cells of the total WBCs.
B. Basophils secrete histamine, serotonin and heparin.
C. Basophils are involved in inflammatory response.
D. Basophils have kidney shaped nucleus.
E. Basophils are agranulocytes.
Choose the correct answer from the options given below:

A
C and E only
B
B and C only
C
A and B only
D
D and E only

B and C only

Neural Control and Coordination

The parts of human brain that helps in regulation of sexual behavior, expression of excitement, pleasure, rage, fear, etc. are:

A
Corpora quadrigemina & hippocampus
B
Brain stem & epithalamus
C
Corpus callosum and thalamus
D
Limbic system & hypothalamus

Limbic system & hypothalamus

Animal Kingdom

The unique mammalian characteristics are:

A
Hairs, pinna and mammary glands
B
Hairs, pinna and indirect development
C
Pinna, monocondylic skull and mammary glands
D
Hairs, tympanic membrane and mammary glands

Hairs, pinna and mammary glands

Molecular Basis of Inheritance

Which one of the following is the sequence on corresponding coding strand, if the sequence of mRNA formed is as follows:
5’ AUCGAUCGAUCGAUCGAUCGAUCG AUCG 3’?

A
3’ UAGCUAGCUAGCUAGCUAGCUAGCUAGC 5’
B
5’ ATCGATCGATCGATCGATCGATCGATCG 3
C
3’ ATCGATCGATCGATCGATCGATCGATCG 5’
D
5’ UAGCUAGCUAGCUAGCUAGCUAGC UAGC 3’

5’ ATCGATCGATCGATCGATCGATCGATCG 3

Strategies for Enhancement in Food Production

Which one of the following is NOT an advantage of inbreeding?

A
It exposes harmful recessive genes that are eliminated by selection
B
Elimination of less desirable genes and accumulation of superior genes takes place due to it
C
It decreases the productivity of inbred population, after continuous inbreeding
D
It decreases homozygosity

It decreases homozygosity

Structural Organisation in Animals

Which of the following is characteristic feature of cockroach regarding sexual dimorphism?

A
Presence of anal styles
B
Presence of sclerites
C
Presence of anal cerci
D
Dark brown body colour and anal cerci

Presence of anal styles

Cell Cycle and Cell Division

Select the correct statements:
A. Tetrad formation is seen during Leptotene.
B. During Anaphase, the centromeres split and chromatids separate.
C. Terminalization takes place during Pachytene.
D. Nucleolus, Golgi complex and ER are reformed during Telophase.
E. Crossing over takes place between sister chromatids of homologous chromosome.
Choose the correct answer from the options given below:

A
B and D only
B
A, C and E only
C
B and E only
D
A and C only

B and D only

Locomotion and Movement

Which of the following statements are correct regarding skeletal muscle?
A. Muscle bundles are held together by collagenous connective tissue layer called fascicle.
B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.
C. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.
D. M line is considered as functional unit and contraction called sarcomere.
Choose the most appropriate answer from the options given below:

A
B and C only
B
A, C and D only
C
C and D only
D
A, B and C only

B and C only

Animal Kingdom

Select the correct statements with reference to chordates.
A. Presence of a mid-dorsal, solid and double nerve cord.
B. Presence of closed circulatory system.
C. Presence of paired pharyngeal gillslits.
D. Presence of dorsal heart.
E. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below:

A
B and C only
B
B, D and E only
C
C, D and E only
D
A, C and D only

B and C only

Mineral Nutrition

Which micronutrient is required for splitting of water molecule during photosynthesis?

A
Molybdenum
B
Magnesium
C
Copper
D
Manganese

Manganese

Anatomy of Flowering Plants

Given below are two statements:
Statement I: Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement II : Exarch condition is the most common feature of the root system.
In the light of the above statements, choose the correct answer from the options given below.

A
Both Statement I and Statement II are false
B
Statement I is correct but Statement II is false
C
Statement I is incorrect but Statement II is true
D
Both Statement I and Statement II are true

Statement I is incorrect but Statement II is true

Molecular Basis of Inheritance

Unequivocal proof that DNA is the genetic material was first proposed by

A
Alfred Hershey and Martha Chase
B
Avery, Macleoid and McCarty
C
Wilkins and Franklin
D
Frederick Griffith

Alfred Hershey and Martha Chase

Principles of Inheritance and Variation

The phenomenon of pleiotropism refers to

A
Presence of two alleles, each of the two genes controlling as single trait
B
A single gene affecting multiple phenotypic expression
C
More than two genes affecting a single character
D
Presence of several alleles of a single gene controlling a single crossover

A single gene affecting multiple phenotypic expression

Biotechnology: Principles and Processes

Upon exposure to UV radation, DNA stained with ethidium bromide will show

A
Bright blue colour
B
Bright yellow colour
C
Bright orange colour
D
Bright red colour

Bright orange colour

Sexual Reproduction in Flowering Plants

Large, colourful, fragrant flowers with nectar are seen in

A
Bird pollinated plants
B
Bat pollinated plants
C
Wind pollinated plants
D
Insect pollinated plants

Insect pollinated plants

Cell Cycle and Cell Division

Among eukaryotes, replication of DNA takes place in

A
S phase
B
G1 phase
C
G2 phase
D
M phase

S phase

Molecular Basis of Inheritance

Expressed Sequence Tags (ESTs) refers to

A
All genes that are expressed as proteins
B
All genes whether expressed or unexpressed
C
Certain important expressed genes
D
All genes that are expressed as RNA

All genes that are expressed as RNA

Biodiversity and Conservation

Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?

A
Over exploitation for economic gain
B
Alien species invasions
C
Co-extinctions
D
Habitat loss and fragmentation

Habitat loss and fragmentation

Respiration in Plants

Given below are two statements: One is labeled as Assertion A and the other is labeled as Reason R.
Assertion A: ATP is used at two steps in glycolysis.
Reason R: First ATP is used in converting glucose into glucose–6–phosphate and second ATP is used in conversion of fructose–6–phosphate into fructose–1–6–diphosphate.
In the light of the above statements, choose the correct answer from the options given below.

A
Both A and R are true but R is NOT the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true and R is the correct explanation of A

Both A and R are true and R is the correct explanation of A

Sexual Reproduction in Flowering Plants

What is the function of tassels in the corn cob?

A
To trap pollen grains
B
To disperse pollen grains
C
To protect seeds
D
To attract insects

To trap pollen grains

Biodiversity and Conservation

The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year

A
1992
B
1986
C
2002
D
1985

1992

Ecosystem

Identify the correct statements:
A. Detrivores perform fragmentation.
B. The humus is further degraded by some microbes during mineralization.
C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
D. The detritus food chain begins with living organisms.
E. Earthworms break down detritus into smaller particles by a process called catabolism.
Choose the correct answer from the options given below:

A
B, C, D only
B
C, D, E only
C
D, E, A only
D
A, B, C only

A, B, C only

Photosynthesis in Higher Plants

The reaction centre in PS II has an absorption maxima at

A
700 nm
B
660 nm
C
780 nm
D
680 nm

680 nm

Morphology of Flowering Plants

Axile placentation is observed in

A
China rose, Beans and Lupin
B
Tomato, Dianthus and Pea
C
China rose, Petunia and Lemon
D
Mustard, Cucumber and Primrose

China rose, Petunia and Lemon

Plant Growth and Development

In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as

A
Dedifferentiation
B
Development
C
Senescence
D
Differentiation

Dedifferentiation

Biotechnology: Principles and Processes

During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out

A
DNA
B
Histones
C
Polysaccharides
D
RNA

DNA

Biomolecules

Cellulose does not form blue colour with lodine because

A
It is a helical molecule
B
It does not contain complex helices and hence cannot hold iodine molecules
C
It breakes down when iodine reacts with it
D
It is disaccharide

It does not contain complex helices and hence cannot hold iodine molecules

Plant Growth and Development

Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

A
Gibberellic Acid
B
Zeatin
C
Abscisic Acid
D
Indole–3–butyric Acid

Gibberellic Acid

Plant Kingdom

Identify the pair of heterosporous pteridophytes among the following

A
Selaginella and Salvinia
B
Psilotum and Salvinia
C
Equisetum and Salvinia
D
Lycopodium and Selaginella

Selaginella and Salvinia

Cell Cycle and Cell Division

The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?

A
Pachytene
B
Diplotene
C
Diakinesis
D
Zygotene

Pachytene

Plant Growth and Development

Which hormone promotes internode/petiole elongation in deep water rice?

A
Kinetin
B
Ethylene
C
2, 4–D
D
GA3

Ethylene

Molecular Basis of Inheritance

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by

A
Sutton and Boveri
B
Alfred Sturtevant
C
Henking
D
Thomas Hunt Morgan

Alfred Sturtevant

Photosynthesis in Higher Plants

How many ATP and NADPH2 are required for the synthesis of one molecule of Glucose during Calvin cycle?

A
18 ATP and 12 NADPH2
B
12 ATP and 16 NADPH2
C
18 ATP and 16 NADPH2
D
12 ATP and 12 NADPH2

18 ATP and 12 NADPH2

Plant Kingdom

Given below are two statements: One is labeled as Assertion A and the other is labeled as Reason R.
Assertion A: The first stage of gametophyte in the life cycle of moss is protonema stage.
Reason R: Protonema develops directly from spores produced in capsule.
In the light of the above statements, choose the most appropriate answer from the options given below.

A
Both A and R are correct but R is NOT the correct explanation of A
B
A is correct but R is not correct
C
A is not correct but R is correct
D
Both A and R are correct and R is the correct explanation of A

Both A and R are correct and R is the correct explanation of A

Molecular Basis of Inheritance

What is the role of RNA polymerase III in the process of transcription in Eukaryotes?

A
Transcription of tRNA, 5 srRNA and snRNA
B
Transcription of precursor of mRNA
C
Transcription of only snRNAs
D
Transcription of rRNAs (28S, 18S and 5.8S)

Transcription of tRNA, 5 srRNA and snRNA

Environmental Issues

The thickness of ozone in a column of air in the atmosphere is measured in terms of

A
Decibels
B
Decameter
C
Kilobase
D
Dobson units

Dobson units

Transport in Plants

Given below are two statements:
Statement I: The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height.
Statement II : Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling.

A
Both Statement I and Statement II are incorrect
B
Statement I is correct but statement II is incorrect
C
Statement I is incorrect but Statement II is correct
D
Both Statement I and Statement II are correct

Both Statement I and Statement II are correct

Organisms and Populations

In the equation GPP – R =NPP, GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is _________.

A
Respiratory quotient
B
Respiratory loss
C
Reproductive allocation
D
Photosynthetically active radiation

Respiratory loss

Morphology of Flowering Plants

Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae

A
Polyadelphous and epipetalous stamens
B
Monoadelphous and Monothecous anthers
C
Epiphyllous and Dithecous anthers
D
Diadelphous and Dithecous anthers

Diadelphous and Dithecous anthers

Biotechnology: Principles and Processes

In gene gun method used to introduce alien DNA into host cells, microparticles of __________metal are used.

A
Zinc
B
Tungsten or gold
C
Silver
D
Copper

Tungsten or gold

Transport in Plants

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by

A
Facilitated Diffusion
B
Passive Transport
C
Active transport
D
Osmosis

Active transport

Cell Cycle and Cell Division

Which of the following stages of meiosis involves division of centromere?

A
Metaphae II
B
Anaphase II
C
Telophase
D
Metaphase I

Anaphase II

Sexual Reproduction in Flowering Plants

In Angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are

A
Antipodals, synergids and primary endosperm nucleus
B
Synergids, Zygote and primary endosperm nucleus
C
Synergids, antipodals and polar nuclei
D
Synergids, primary endosperm nucleus and zygote

Synergids, Zygote and primary endosperm nucleus

Anatomy of Flowering Plants

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Late wood has fewer xylary elements with narrow vessels.
Reason R : Cambium is less active in winters.

A
Both A and R are true but R is NOT the correct explanation of A
B
A is true but R is False
C
A is false but R is true
D
Both A and R are true and R is the correct explanation of A

Both A and R are true and R is the correct explanation of A

Biomolecules

Malonate inhibits the growth of pathogenic bacteria by inhibiting activity of

A
Amylase
B
Lipase
C
Dinitrogenase
D
Succinic dehydrogenase

Succinic dehydrogenase

Mineral Nutrtion

Match List I with List II List – I List – II A Iron I synthesis of auxin B Zinc II Component of Nitrate C Boron III Activator of catalase D Molybdenum IV Cell elongation and Differentiation Choose the correct answer from the options given below:

A
A-II, B-III, C-IV, D-I
B
A-III, B-I, C-IV, D-II
C
A-II, B-IV, C-I, D-III
D
A-III, B-II, C-I, D-IV

A-III, B-I, C-IV, D-II

Environmental Issues

Which one of the following statements is NOT correct

A
Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries
B
Water hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem dynamics of the water body
C
The amount of some toxic substances of industrial waste water increases in the organism at successive trophic levels
D
The micro-organisms involves in biodegradation of organic matter in a sewage polluted water causing the death of aquatic organisms

Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries

Respiration in Plants

Match List I with List II List I List II A Oxidative decarboxylation I Citrate synthase B Glycolysis II Pyruvate dehydrogenase C Oxidative Phosphorylation III Electron transport system D Tricarboxylic acid cycle IV EMP Pathway

A
A-II, B-IV, C- I, D-III
B
A-III, B-I, C- II, D-IV
C
A-II, B-IV, C- III, D-I
D
A-III, B-IV, C- II, D-I

A-II, B-IV, C- III, D-I

Principles of Inheritance and Variation

Which of the following statements are correct about Klinefelter’s Syndrome?
A. This disorder was first described by Langdon Down (1866)
B. Such an individual has overall masculine development. However, the feminine development is also expressed.
C. The affected individual is short statured.
D. Physical, sychomotor and mental development is retarded.
E. Such individuals are sterile Choose the correct answer from the options given below.

A
C and D only
B
B and E only
C
A and E only
D
A and B only

B and E only

Organisms and Populations

Match List I with List II List – I (Interaction) List – II (Species A and B) A Mutualism I +(A), O(B) B Commensalism II -(A), O(B) C Amensalism III +(A),-(B) D Parasitism IV +(A),+(B) Choose the correct answer from the options given below:

A
A-V, B-I, C-II, D-III
B
A-IV, B-III, C-I, D-II
C
A-III, B-I, C-IV, D-II
D
A-IV, B-II, C-I, D-III

A-V, B-I, C-II, D-III

Transport in Plants

Match List I with List II List – I List – II A Cohesion I More attraction in liquid phase B Adhesion II Mutual attraction among water molecules C Surface tension III Water loss in liquid phase D Guttation IV Attraction towards polar surfaces Choose the correct answer from the options given below:

A
A-IV, B-III, C-II, D-I
B
A-III, B-I, C-IV, D-II
C
A-II, B-I, C-IV, D-III
D
A-II, B-IV, C-I, D-III

A-II, B-IV, C-I, D-III

Organisms and Populations

Given below are two statements:
Statement I : Gause’s ‘Competitive Exclusion Principle states that two closely related species competing for the same resource cannot co – exist indefinitely and competitively inferior one will be eventually.
Statement II : In general carnivores are more adversely affected by competition than herbivores.
In the light of the above statements choose the correct answer from the options given below.

A
Both the statement I and Statement II are false
B
Statement I is correct but statement II is false
C
Statement I is incorrect but Statement II is true
D
Both the statement I and Statement II are true

Statement I is correct but statement II is false

Anatomy of Flowering Plants

Identify the correct statements.
A. Lenticels are the lens – shaped openings permitting the exchange of gases.
B. Bark formed early in the season is called hard bark.
C. Bark is a technical term that refers to all tissues exterior to vascular cambium.
D. Bark refers to periderm and secondary phloem.
E. Phellogen is single layered in thickness. Choose the correct answer from the options given below.

A
A and D only
B
A, B and D only
C
B and C only
D
B, C and E only

A and D only

Plant Kingdom

Given below are two statements : One is labelled as Assertion A and the other is labeled as Reason R :
Assertion A : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not found.

A
Both A and R are true but R is NOT the correct explanation of A.
B
A is true but R is false.
C
A is false but R is true.
D
Both A and R are true and R is the correct explanation of A.

A is true but R is false.

Biotechnology: Principles and Processes

Main steps in the formation of Recombinant DNA are given below. Arrange these steps in a correct sequence.
A. Insertion of recombinant DNA into the host cell.
B. Cutting of DNA at specific location by restriction enzyme.
C. Isolation of desired DNA fragment.
D. Amplification of gene of interest using PCR.
Choose the correct answer form the options given below:

A
C, A, B, D
B
C, B, D, A
C
B, D, A, C
D
B, C, D, A

C, B, D, A

Cell Cycle and Cell Division

Match List I with List II List – I List – II A M Phase I Proteins are synthesized B G2 Phase II. Inactive phase C Quiescent III. Interval between mitosis and initiation of DNA replication D G1 Phase IV Equational division

A
A-IV, B-II, C-I, D-III
B
A-IV, B-I, C-II, D-III
C
A-II, B-IV, C-I, D-III
D
A-III, B-II, C-IV, D-I

A-IV, B-I, C-II, D-III

Cell: The Unit of Life

How many different proteins does the ribosome consist of?

A
60
B
40
C
20
D
80

80

Photosynthesis in Higher Plants

Which of the following combinations is required for chemiosmosis?

A
Membrane, proton pump, proton gradient, NADP synthase
B
Proton pump, electron gradient, ATP synthase
C
Proton pump, electron gradient, NADP synthase
D
Membrane, proton pump, proton gradient, ATP synthase

Membrane, proton pump, proton gradient, ATP synthase

Morphology of Flowering Plants

Given below are two statements : One is labeled as Assertion A and other is labeled as Reason R Assertion A:
A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.
Reason R : Internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves.
In the light of the above statements, choose the correct answer from the options given below:

A
Both A and R are true but R is NOT the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true and R is the correct explanation of A

Both A and R are true and R is the correct explanation of A

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