Practice

Question 51

The amino acid coded by the start codon for protein synthesis is

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Correct answer: (A) Methionine

1 marks · 2023 · Set A

Question 52

In humans, the numbers of ova and sperms that would be produced from 100 secondary oocytes and 100 secondary spermatocytes during gametogenesis are

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Correct answer: (C) 100 ova and 200 sperms

1 marks · 2023 · Set A

Question 53

Crossing-over occurs between

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Correct answer: (A) Non-sister chromatids of homologous chromosomes at pachytene stage of prophase I

1 marks · 2023 · Set A

Question 54

The Bartholin glands of the female reproductive system are located on the

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Correct answer: (C) Either side of the vagina

1 marks · 2023 · Set A

Question 55

If both genotype and phenotype show the same ratio of 1 : 2 : 1 in the F₂ generation, it shows

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Correct answer: (A) Incomplete dominance in a monohybrid cross

1 marks · 2023 · Set A

Question 56

Which of the following enzymes separates the two strands of DNA during replication?

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Correct answer: (B) Helicase

1 marks · 2023 · Set A

Question 57

Cytoplasmic inheritance is also called maternal inheritance because

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Correct answer: (C) Most of the cytoplasm of the zygote is provided by the ovum

1 marks · 2023 · Set A

Question 58

Male XX and female XY are sometimes seen as a result of

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Correct answer: (B) Segment transfer in the X and Y chromosomes

1 marks · 2023 · Set A

Question 59

Which of the following two traits is characteristic of a single gene?

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Correct answer: (C) Colour of flower and seed coat

1 marks · 2023 · Set A

Question 60

Which of the following enzymes is used to cut DNA molecules in rDNA technology?

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Correct answer: (C) Restriction enzymes

1 marks · 2023 · Set A

Question 61

_____ in 1983 used recombinant DNA technology to produce insulin.

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Correct answer: (A) Eli Lilly

1 marks · 2023 · Set A

Question 62

Which of the following is the first genetically engineered hormone?

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Correct answer: (B) Insulin

1 marks · 2023 · Set A

Question 63

Which of the following statements is false?

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Correct answer: (D) More than one of the above

1 marks · 2023 · Set A

Question 64

The DNA fingerprinting pattern of a child is

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Correct answer: (C) 50% bands similar to the father and the rest similar to the mother

1 marks · 2023 · Set A

Question 65

Which of the following statements is true?

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Correct answer: (A) All immunogens are antigens but all antigens are not immunogens.

1 marks · 2023 · Set A

Question 66

If more than a single species of fish is cultured at a time, then it is called

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Correct answer: (C) Polyculture

1 marks · 2023 · Set A

Question 67

Which of the following is a step taken by the Government to protect wildlife?

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Correct answer: (C) Various projects to protect animals in the forest

1 marks · 2023 · Set A

Question 68

On what does the harmful effect of pollution depend?

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Correct answer: (B) The concentration, duration of exposure to pollutants, and the organism

1 marks · 2023 · Set A

Question 69

Absence of acrosome will affect which activity in a normal sperm?

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Correct answer: (C) Penetration into the ovum

1 marks · 2023 · Set A

Question 70

How can viable material of endangered species be preserved?

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Correct answer: (B) By gene bank

1 marks · 2023 · Set A

Question 71

Who among the following is known as the father of biological classification?

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Correct answer: (A) Carolus Linnaeus

1 marks · 2023 · Set A

Question 72

The animals from which of the following phyla are exclusively marine?

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Correct answer: (C) Echinodermata

1 marks · 2023 · Set A

Question 73

Which of the following is not an RNA virus?

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Correct answer: (E) None of the above

1 marks · 2023 · Set A

Question 74

In which State is the Vikramshila Gangetic Dolphin Sanctuary located?

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Correct answer: (B) Bihar

1 marks · 2023 · Set A

Question 75

Which of the following is an example of dense irregularly arranged connective tissue?

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Correct answer: (B) Dermis

1 marks · 2023 · Set A

Question 76

Which artery supplies oxygenated blood to the rabbit brain?

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Correct answer: (C) Internal carotid

1 marks · 2023 · Set A

Question 77

In transmission electron microscopy, ultrathin sections are stained by

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Correct answer: (A) Uranyl acetate and lead citrate

1 marks · 2023 · Set A

Question 78

In the unit membrane model, what is the thickness of each dense band?

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Correct answer: (A) 20 Å

1 marks · 2023 · Set A

Question 79

Facilitated diffusion differs from simple diffusion by

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Correct answer: (D) More than one of the above

1 marks · 2023 · Set A

Question 80

The numbers of cisternae in a stack of Golgi complex found in most animals and plants are

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Correct answer: (C) 3–8

1 marks · 2023 · Set A

Question 81

A modified form of smooth endoplasmic reticulum found in striated muscles is known as

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Correct answer: (B) Sarcoplasmic reticulum

1 marks · 2023 · Set A

Question 82

Which of the following enzymes is found on the outer membrane of mitochondrial cristae?

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Correct answer: (E) None of the above

1 marks · 2023 · Set A

Question 83

The leucoplasts which function in the storage of starch are called

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Correct answer: (A) Amyloplasts

1 marks · 2023 · Set A

Question 84

Which of the following is not a type of secondary lysosome?

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Correct answer: (D) More than one of the above

1 marks · 2023 · Set A

Question 85

Which activity takes place during the post-mitotic gap phase (G₁)?

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Correct answer: (A) RNA and protein synthesis

1 marks · 2023 · Set A

Question 86

Synapsis takes place during

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Correct answer: (B) Zygotene

1 marks · 2023 · Set A

Question 87

Which of the following is an example of a simple protein?

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Correct answer: (E) None of the above

1 marks · 2023 · Set A

Question 88

Which of the following liver cells phagocytizes dead and inactive RBCs?

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Correct answer: (B) Kupffer’s cells

1 marks · 2023 · Set A

Question 89

Which marriage should be prohibited from a biological point of view?

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Correct answer: (B) Rh+ boy and Rh− girl

1 marks · 2023 · Set A

Question 90

Each actin (thin) filament is made up of

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Correct answer: (D) More than one of the above

1 marks · 2023 · Set A

Question 91

Cushing’s syndrome occurs due to

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Correct answer: (C) Maximum secretion of cortisol

1 marks · 2023 · Set A

Question 92

Which of the following methods is used for measuring population density for more mobile organisms?

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Correct answer: (A) Capture-recapture method

1 marks · 2023 · Set A

Question 93

Desert ecosystem is characterised by:

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Correct answer: (C) Extremely high or low temperatures, low rainfall, and scarce or no vegetation

1 marks · 2023 · Set A

Question 94

Which of the following hormones from the adenohypophysis controls the function of the seminiferous tubules?

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Correct answer: (A) Luteinizing hormone (LH)

1 marks · 2023 · Set A

Question 95

Which enzyme is produced by the epididymis?

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Correct answer: (D) More than one of the above

1 marks · 2023 · Set A

Question 96

In which region of the fallopian tube does fertilization take place?

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Correct answer: (B) Ampulla

1 marks · 2023 · Set A

Question 97

The ovary is suspended from the body wall by

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Correct answer: (A) Mesovarium

1 marks · 2023 · Set A

Question 98

The pubertal changes in secondary sex characteristics result from increasing levels of which of the following hormones?

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Correct answer: (A) Gonadal steroids

1 marks · 2023 · Set A

Question 99

During spermatogenesis, type B spermatogonia divide by

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Correct answer: (B) Mitosis

1 marks · 2023 · Set A

Question 100

The fusion of sperm and oocyte membranes causes what to occur?

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Correct answer: (B) Cortical reaction

1 marks · 2023 · Set A

TRE1 — General Studies And Zoology