BIO CUET 2023

1. Match  the terms in Column I with the organisms in Column II and select the correct option.

(a) A−4, B − 2, C − 5, D – 3

(b) A-2, B-4, C-5, D-3

(c) A-3, B-4, C-5, D-2

(d) A-2, B-3, C-4, D5

Answer:

2. Read the following statements and identify the correct statements about the generative cell of a pollen grain. Choose the option containing all correct statements.

A. Generative cell is irregular in shape.

B. It has a dense cytoplasm and a nucleus.

C. It has abundant food reserves.

D. It is spindle-shaped.

E. It floats in the cytoplasm of the vegetative cell.

F. It undergoes meiosis to form two male gametes.

(a) A, B and D

(c) A, B and E

(b) B, D and E

(d) B, D and F

Answer:

3. The function of fimbriae in the human female

reproductive system, is to

(a) help in the collection of ovum immediately after

ovulation.

(b) make the required changes in the endometrium

of uterus for implantation.

(c) help in the development of corpus luteum..

(d) collect nutrition for the fallopian tube.

Answer:

4. Match the items of Column I with those

Column II and select the correct option.

(a) A-3, B4, C-2, D-5

(b) A-3, B-I, C-4, D-2

(c) A-2, B-4, C-5, D-3

(d) A-3, B-5, C-2, D-1

Answer:

5. In snapdragon, a cross between a red-flowered (RR plant and a white-flowered (rr) plant resulted in a pink flowered progeny. If a cross is made between pink flowered plant and a white-flowered plant, the expecte phenotypic ratio in the progeny will be

(a) 1 pink-flowered: 1 white-flowered

(b) 1 red-flowered: 1 white-flowered

(c) 3 pink-flowered: 1 white-flowered

(d) I red-flowered: 2 pink-flowered :

      I white-flowered

Answer:

6.Suppose an mRNA molecule with repeating sequence of GU bases – GUGUGUGUGUGU codes for a tetra peptide with alternating sequence of valine and cysteine it proves that the codons for valine and cysteine are

(a) GUG and UGU

(b) UGU and GUG

(c) GUU and UGG

(d) UGG and GUU

Answer:

7. Identify whether each of the following statements is True (T) or False (F) and select the correct option.

A. The skull of a baby chimpanzee is more like the adult human skull than the skull of an adult chimpanzee.

B. It is believed that 3-4 mya, man-like primates walked

in Eastern Africa,

C. Due to continental drift, pouched mammals of

Australia survived due to lack of competition.

D. Tyrannosaurus was the smallest among the dinosaurs.

(a) A-T, B-T, C-T, D-F

(b) A-F, B-T, C-T, D-F

(c) A-T, B-F, C-T, D-F

(d) A-T, B-F, C-F, D-T

Answer:

8. Read the following statements- Assertion (A) and Reason (R), and choose the correct alternative from the options given below:

Assertion (A): Animal breeders have been able to produce improved varieties of several domestic animals such as dogs, horses pigeons etc from their wild ancestors.

Reason (R): The process used by animal breeders do produce a new breed with desired traits is a natural section.

Alternatives:

(a) Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A)

(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A)

(c) Assertion (A) is true but Reason (R) is false

(d) Both Assertion (A) and Reason (R) are false

Answer:

9. When a cell gets injected with a virus, it produces a chemical that can protect neighbouring cells against infection.

(a) Colostrum

(c) Histamine

(b) Serotonin

(d) Interferon

Answer:

10. Select the incorrect statements about the method of

breeding of animals

(i) Mating of animals of same breed but having no common ancestors on either side for 4-6 generations is out-breeding.

(ii) Breeding of animals belonging to two different two different breeds is inter specific hybridisation.

(iii) Mating of animals of two different species is cross-

breeding.

(iv) Mating of closely related individuals within the

same breed is inbreeding.

(a) only (i)

(c) only (iii)

(b) both (ii) and (iii)

(d) both (iii) and (iv)

Answer:

11. Bacillus thuringiensis is a bacteria that is used to

eliminate

(a) Insect pests

(b) Nematodes

(c) Fungal Pathogens

(d) Bacterial Pathogens

Answer:

12. Process of using recombinant DNA technology to alter

the genetic makeup of an organism is:

(a) Genetic engineering

(b) Gene amplification

(c) Gene cloning

(d)  (d)Gene editing

Answer:

13. Green revolution has been a enormous success in terms

of production but still its not preferable one because

(a) It has not succeeded in fulfilling the demands of

humans

(b) Use of pesticides and fertilizers is expensive and

harmful too

(c) Results of production were not same throughout

India.

(d) All of these

Answer:

14. Choose the correct option in regarding 4 levels of

biological organisation.

(a) Individual, tissue, population, cell

(b) Individual, population, biome, cell

(c) Individual, population, biome, community

(d) Cell, tissue, organism, population

Answer:

15. Which of the following is not a hypothesis for why

food-chain length is limited?

(a) Food-chain length is limited by one organism's

ability to consume another.

(b) Food-chain length is limited because they are easily

disrupted by environmental perturbations.

(c) Food-chain length is limited by productivity.

(d) Food-chain length is a function of an ecosystem's

physical structure

Answer:

16. Identify whether each of the following statements is True (T) or False (F) and select the correct option:

A. Mitotic cell divisions occur during embryogenesis.

B. Plants produced through vegetative propagation are called clones.

C. Bony fishes, bryophytes and pteridophytes show

internal fertilisation.

D. Gametes are always haploid and gametogenesis

always involves meiosis.

(a) A-T, B-T, C-F, D-F

(b) A-F, B-F, C-T, D-T

(c) A-T, B-F, C-T, D-F

(d) A-T, B-F, C-F, D-T

Answer:

17. Match the terms in Column I with the descriptions in

Column II and select the correct option.

(a) A-3, B-4, Ç − 2, D − 1

(b) A-4, B-3, C-2, D-1

(c) A-3, B4, C-1, D-2

(d) A-2, B-3, C-4, D-1

Answer:

18.During spermatogenesis, meiosis I converts

(a) spermatogonia into primary spermatocytes

(b) primary spermatocytes into secondary

spermatocytes

(c) secondary spermatocytes into spermatids

(d) spermatids into spermatozoa

Answer:

19. Which of the following are the causes/reasons for

population explosion?

A. Increase in MMR

B. Decrease in IMR

C. No starvation deaths in the populations

D. Decrease in MMR

E. Increase in IMR

F. Discovery of life-saving drugs

(a) A, C and D

(b) A, C, D and F

(c) B, C and E

(d) B, C, D and F

Answer:

20. When both father and mother have blood group AB,

they can have children of

(a) blood group AB only

(b) blood groups A and B

(c) blood groups A, B and AB

(d) blood groups A, B, AB and O

Answer:

21. Which of the following statements is correct?

A. Every intron is a set of three codons coding for

an amino acid.

B. Codons are present on the mRNA and anticodons

on (RNA).

C. Exons are the coding sequences that form parts of

mRNA and code for amino acids.

D. Introns are present on mRNA and exons on tRNA

E. A cistron is defined as a segment of DNA coding

for a polypeptide.

(a) B, C and E

(b) A, D and E

(c) B, D and E

(d) C, D and E

Answer:

22. Mark the odd one in each of the following groups and select the correct option.

A. Carboniferous, Triassic, Devonian, Permian

B. Bobcat, Wolf, Ant eater, Spotted cuscus.

C. Human bands, Wings of butterfly, Wings of bat,

Wings of birds.

D. Lamarckism, Darwinism, Branching descent, Natural

selection.

Answer:

23. HIV is the virus that causes AIDS. Which of the

following is not a method of HIV transmission?

(a) Sharing the infected needles.

(b) Transfusion of contaminated blood.

(c) Sexual contact with infected persons.

(d) Shaking hands with infected persons.

Answer:

24. Poultry farming is raising of birds domestically or

commercially for

(i) meat

(ii) milk production

(iii) egg production

(iv) feather production

(a) (i) and (ii)

(c). (i) and (iii)

(b) (ii) and (iii)

(d) (ii) and (iv)

Answer:

25. Identify whether each of the following statements is

True (T) or False (F) and select the correct option.

A. Trichoderma is a fungus used as a biocontrol agent. B. Cyclosporin A is used for lowering the blood

cholesterol level.

C. Biogas plants are more often built in rural areas.

D. Bacteria, viruses and fungi are used as biofertilisers.

(a) A-T, B-F, C-F, D-T

(b) A-T, B-T, C-F, D-F ·

(c) A-T, B-F, C-T, D-F

(d) A-F, B-F, C-T, D-F

Answer:

26. Which of the following processes are included under

biotechnology?

(a) In vitro fertilization leading to a test tube baby

(b) Synthesising a gene/correcting a defective gene

(c) Developing a DNA vaccine

(d) All of the above

Answer:

27. Applications of biotechnology include

(a) Therapeutics          (c) None of these

(b) Bioremediation      (d) Both (a) and (b)

Answer:

28. Which statement is true corresponding to the given food

chain?

Grass → Rabbits → Snakes → Hawks

(a) Each predator population has a greater biomass

than its prey population.

(b) Each prey population has a greater biomass than its

predator population.

(c) Each population is omnivorous.

(d) Each level of food chain returns inorganic nutrients

and energy to the producer.

Answer:

29. Mark the odd one in each of the following groups and select the correct option.

A. Earthworms, Sponges, Cockroaches, Tapeworms.

B. Turkey, Honey bees, Camels, Rotifers

C. Bony fishes, Reptiles, Birds, Bryophytes

D. Reptiles, Monkeys, Birds, Frogs

(a) A- Sponges                         B- Honey bees

C - Reptiles                              D - Birds

(b) A- Cockroach                     B - Camels

C- Bony fishes                         D - Frogs

(c) A-Cockroach                      B - Camels

C - Bryophytes                                    D - Frogs

(d) A - Tapeworms                  B - Turkeys

9.     C- Bony fishes                         D - Reptiles

Answer:

30. Read the following statements-Assertion (A) and Reason (R), and choose the correct alternative from the options given below:

Assertion (A): In summer, when the outside temperature is more than our body temperature, we sweat profusely. Reason (R): In winter, when the outside temperature is very low, we start shivering.

Alternatives:

(a) Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A)

(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A)

(c) Assertion (A) is true but Reason (R) is false

(d) Both Assertion (A) and Reason (R) are false

Answer:

31. Identify the correct statements regarding the structure of

an angiospermic micro-sporangium and select the correct option.

A. In a transverse section, a typical microsporangium

appears near circular in outline.

B. Each microsporangium is surrounded by four wall layers-epidermis, endothecium, middle layers and tapetum.

C. The outer three layers, epidermis endothecium and middle layers are protective and also help in the dehiscence of anthers.

D. In a young anther, the centre of the microsporangium is occupied by a group of compactly arranged homogeneous cells, which form microspores by mitosis.

E. The cells of tapetum undergo meiosis.

(a) A, B and C

(c) B, C and D

(b) A, C and E

(d) B, C and E

Answer:

32. All the oogonia in a human female are formed during

the embryonic developmental stages, i.e., in the female foetus and none after birth. Fill in the blanks in the flow chart showing the development of an oogonium into a mature Graafian follicle and select the correct option.

(a) A Primary oocyte, B Tertiary follicle,

C- Secondary follicle

(b) A Primary oocyte, B Secondary follicle,

-C-Tertiary follicle

(c) A - Secondary oocyte, B - Secondary follicle,

C-Tertiary follicle

(d) A - Secondary follicle, B - Secondary oocyte,

C.- Tertiary follicle

Answer:

33. Saheli, the new contraceptive pill for females was

developed by scientists at

(a) ICMR, New Delhi

(b) CDRI, Lucknow

(c) CSIR, New Delhi

(d) IARI, New Delhi

Answer:

34. If the blood group of a child is A and of his mother is B, the genotypes and phenotypes of the mother and father are

(a) mother I^B i, B'group and father I^AI^A, A group

(b) motherI^B i, B group and father I^Ai, A group

(c) motherI^B, B group and father I^AI3, A^B group

(d) all of the above

Answer:

35. Identify the correct statement from among the following:

(a) mRNA is polycistronic in prokaryotes and

monocistronic in eukaryotes.

(b) mRNA is polycistronic in eukaryotes and

monocistronic in prokaryotes.

(c) mRNA is polycistronic in both eukaryotes and

prokaryotes.

(d) mRNA is monocistronic in both eukaryotes and

prokaryotes.

Answer:

36. Evolution helps to study the ancestors of an organism.

Select the incorrect option about evolution.

(a) Evolution is a naturally occurring slow, continuous

and irreversible process of change,

(b) Evolution leads to heritable changes in population from generation to generation resulting in diversity of organisms on earth.

(c) Evolution is a process that involves that life

originated from non-living matter.

(d) Evolution involves a sequence of gradual changes from primitive organisms to the present-day organisms.

Answer:

37. The term 'smack' refers to a drug produced from the

(a) Leaves of Cannabis sativa

(b) Flowers of Datura

(c) Fruits of Erythroxylum coca

(d) Latex of Papaver somniferum

Answer:

38. Which of the following is not an advantage of tissue

culture?

(a) A large number of plants can be propagated in a

short duration.

(b) Healthy plants can be multiplied

(c) Seedless plants can be multiplied

(d) It is even useful in cases where sexual reproduction

is possible.

Answer:

39. Mark the odd one in each of the following groups and select the correct option.

A. Anabaena, Streptococcus, Nostoc, Oscillatoria.

B. Dragonflies, Trichoderma, Baculoviruses, Glomus.

C. Whisky, Wine, Brandy, Rum.

D. Clostridium, Lactobacillus, Aspergillus, Acetobacter.

Answer:

40. The basic techniques of modern biotechnology is/are

(a) Chemical engineering

(b) Genetic engineering

(c) Both (a) and (b)

(d) None of these

Answer:

41. Best way to increase food production without using

fertilizers and pesticides is

(a) Green revolution

(b) Aeroponics

(c) Hydroponics

(d) Genetically engineered technique

Answer:

42. Mark the odd one in each of the following groups and

select the correct option.

A. Aestivation, Migration, Hibernation, Diapause.

B. Parasitism, Predation, Commensalism, Amensalism.

C. Ticks, Lice Copepods, Tapeworm.

D. Pathogens, Competitors, Temperature, Predators.

Answer:

43. Arrange the following in particular sequence:

Macromolecules, individual, tissue, biome, population,

cell

(a) Macromolecules, individual, tissue, biome, population, cell

(b) Population, cell, macromolecules, individual,

tissue, biome

(c) Macromolecules, cell, tissue, individual, population,

biome

(d) Cell, tissue, macromolecules, individual, population, biome

Answer:

44. Food chains differ from food webs in that

(a) Food chains are single sequence of who eats whom

in a community.

(b) Food chains better represent the entire community.

(c) Food webs represent the complex: interaction

among food chains.

(d) Food chain is the flow of energy in a population.

Answer:

Read the following passage and answer the questions that follow: (Q. 45 to Q. 47)

Patterns of biodiversity are latitudinal gradients, species arca relationship and importance of species diversity to the ecosystem. The diversity of plants and animals is not uniform throughout the world but shows rather uneven distribution. e.g. a forest in a tropical region has up to 10 times as many species of vascular plants as a forest of equal area in a temperate region like Midwest of USA, Alexander Von Humboldt proposed that species richness increases with increasing area, but up to a certain limit. The maintenance of biodiversity is important because of ecological stability, productivity and ecosystem health.

45. Rivet popper hypothesis was given by

(a) Alexander Von Humboldt

(b) Robert May

(c) Edward Wilson

(d) Paul Ehrlich

Answer:

Read the following passage and answer the questions that follow: (Q. 45 to Q. 47)

Patterns of biodiversity are latitudinal gradients, species arca relationship and importance of species diversity to the ecosystem. The diversity of plants and animals is not uniform throughout the world but shows rather uneven distribution. e.g. a forest in a tropical region has up to 10 times as many species of vascular plants as a forest of equal area in a temperate region like Midwest of USA, Alexander Von Humboldt proposed that species richness increases with increasing area, but up to a certain limit. The maintenance of biodiversity is important because of ecological stability, productivity and ecosystem health.

46. Which of the following has the greatest biodiversity on earth?

(a) Tropical Amazonian Rainforest

(b) Temperate Amazonian Rainforest

(c) Montane subtropical forest

(d) Alpine forest

Answer:

Read the following passage and answer the questions that follow: (Q. 45 to Q. 47)

Patterns of biodiversity are latitudinal gradients, species arca relationship and importance of species diversity to the ecosystem. The diversity of plants and animals is not uniform throughout the world but shows rather uneven distribution. e.g. a forest in a tropical region has up to 10 times as many species of vascular plants as a forest of equal area in a temperate region like Midwest of USA, Alexander Von Humboldt proposed that species richness increases with increasing area, but up to a certain limit. The maintenance of biodiversity is important because of ecological stability, productivity and ecosystem health.

47. _______proposed that species richness increases with increasing area, 

(a) Alexander Von Humboldt

(b) Robert May

(c) Edward Wilson

(d) Paul Ehrlich

Answer:

Read the following passage and answer the questions that follow: (Q. 48 to Q. 50)

Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems. The World Health Organization (WHO) defines noise above 65 decibels (dB) as noise pollution. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB,

48. Which of the following steps can be taken to control

Noise pollution?

(a) Delimitation horn free zones around hospitals and

schools

(b) Permissible sound levels of crackers and

loudspeakers

(c) Fixing the time after which loudspeakers cannot

be played.

(d) All of these

Answer:

Read the following passage and answer the questions that follow: (Q. 48 to Q. 50)

Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems. The World Health Organization (WHO) defines noise above 65 decibels (dB) as noise pollution. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB,

49. A prolonged exposure to noise above 80db can cause

(a) Respiratory trouble

(b) nervous tension and altered breathing pattern

(c) Cancer

(d) All of the above

Answer:

Read the following passage and answer the questions that follow: (Q. 48 to Q. 50)

Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems. The World Health Organization (WHO) defines noise above 65 decibels (dB) as noise pollution. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB,

50. Noise causes

(a) High BP by decreasing cholesterol level in blood

(b) Low BP by increasing cholesterol level in blood

(c) Digestive spasms through anxiety

(d) Decrease heart beat

Answer: