Practice

Question 101

The gland that is both exocrine and endocrine is

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Correct answer: (C) pancreas

1 marks · 2023 · Set A

Question 102

The gland responsible for Ca metabolism is

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Correct answer: (C) parathyroid

1 marks · 2023 · Set A

Question 103

The gonadotropic hormone is secreted by

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Correct answer: (C) anterior pituitary

1 marks · 2023 · Set A

Question 104

Secondary sexual characters in males develop under the influence of

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Correct answer: (B) testosterone

1 marks · 2023 · Set A

Question 105

Colour differentiation is performed by

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Correct answer: (B) cones

1 marks · 2023 · Set A

Question 106

The menstrual cycle is controlled by

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

1 marks · 2023 · Set A

Question 107

Fertilization in humans occurs in the

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Correct answer: (C) fallopian tube

1 marks · 2023 · Set A

Question 108

Cessation of the menstrual cycle is called

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Correct answer: (C) menopause

1 marks · 2023 · Set A

Question 109

Spermatogenesis and sperm differentiation occur under the control of

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Correct answer: (A) FSH

1 marks · 2023 · Set A

Question 110

Ovulation occurs under the influence of

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Correct answer: (A) LH

1 marks · 2023 · Set A

Question 111

The secretion produced by the prostate gland is for

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Correct answer: (B) stimulating sperm activity

1 marks · 2023 · Set A

Question 112

Emergency contraceptives are effective if used within

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Correct answer: (A) 72 hours of coitus

1 marks · 2023 · Set A

Question 113

Among the sexually transmitted diseases listed below, identify the one that does not specifically affect the sex organs.

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Correct answer: (B) AIDS

1 marks · 2023 · Set A

Question 114

Why are condoms among the most popular contraceptives?

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

1 marks · 2023 · Set A

Question 115

Oral contraceptives prevent pregnancy by

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

1 marks · 2023 · Set A

Question 116

The term ‘vaccine’ was introduced by

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Correct answer: (C) Louis Pasteur

1 marks · 2023 · Set A

Question 117

Hashish, Ganja and Charas are obtained from

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Correct answer: (A) Cannabis sativa

1 marks · 2023 · Set A

Question 118

Cancer is caused by

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Correct answer: (C) uncontrolled mitosis

1 marks · 2023 · Set A

Question 119

AIDS is transmitted by

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

1 marks · 2023 · Set A

Question 120

Which immunoglobulin can cross the placenta and provide passive immunity to a newborn?

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Correct answer: (A) IgG

1 marks · 2023 · Set A

Question 121

Typhoid fever is caused by

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Correct answer: (B) Salmonella

1 marks · 2023 · Set A

Question 122

Malaria is transmitted by

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Correct answer: (C) female Anopheles

1 marks · 2023 · Set A

Question 123

Deforestation causes

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Correct answer: (B) soil erosion

1 marks · 2023 · Set A

Question 124

Which of the following is an in situ method of conservation?

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Correct answer: (A) National park

1 marks · 2023 · Set A

Question 125

Wildlife numbers are continuously decreasing. What is the main reason?

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

1 marks · 2023 · Set A

Question 126

Which of the following is a major ecological hot spot of India?

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Correct answer: (B) Western Ghats and Eastern Himalayas

1 marks · 2023 · Set A

Question 127

Ozone depletion is caused by an increase in the level of

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Correct answer: (C) chlorofluorocarbon

1 marks · 2023 · Set A

Question 128

What type of chemical weathering is enhanced by acid rain?

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Correct answer: (B) Dissolution

1 marks · 2023 · Set A

Question 129

Who is the father of ecology and environmental laws in India?

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Correct answer: (A) Ramdeo Misra

1 marks · 2023 · Set A

Question 130

Schleiden and Schwann proposed

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Correct answer: (C) cell theory or cell doctrine

1 marks · 2023 · Set A

Question 131

Which of the following is a constituent of the cell membrane?

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

1 marks · 2023 · Set A

Question 132

Cancer cells can be damaged more easily by radiation than normal cells because they are

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Correct answer: (B) undergoing rapid division

1 marks · 2023 · Set A

Question 133

Crossing-over occurs during

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Correct answer: (B) pachytene

1 marks · 2023 · Set A

Question 134

Which nitrogen base is absent from RNA?

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Correct answer: (A) Thymine

1 marks · 2023 · Set A

Question 135

The energy-rich compound produced through respiration is

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Correct answer: (A) ATP

1 marks · 2023 · Set A

Question 136

Eutrophication in a lake is due to the presence of

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Correct answer: (B) nitrogen and phosphorus

1 marks · 2023 · Set A

Question 137

During lightning, the high temperature and pressure created in the air convert nitrogen into

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Correct answer: (C) oxides of nitrogen

1 marks · 2023 · Set A

Question 138

During regulation of gene expression (lac operon), which enzyme hydrolyses lactose to glucose and galactose?

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Correct answer: (C) β-galactosidase

1 marks · 2023 · Set A

Question 139

How many nucleotides does a codon contain?

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Correct answer: (C) 3

1 marks · 2023 · Set A

Question 140

Cytoplasmic inheritance is also called maternal inheritance because

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Correct answer: (C) most of the zygote’s cytoplasm is provided by the ovum

1 marks · 2023 · Set A

Question 141

Gene mutation occurs at the time of

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Correct answer: (B) DNA replication

1 marks · 2023 · Set A

Question 142

What are the differences in specific regions of DNA sequences called during DNA fingerprinting?

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Correct answer: (C) Satellite DNA

1 marks · 2023 · Set A

Question 143

During gene cloning, what is called the ‘gene taxi’?

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Correct answer: (B) Plasmid

1 marks · 2023 · Set A

Question 144

Which enzyme acts as ‘biological scissors’ in genetic engineering?

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Correct answer: (C) Restriction endonuclease

1 marks · 2023 · Set A

Question 145

Polymerase chain reaction is concerned with

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Correct answer: (A) DNA amplification

1 marks · 2023 · Set A

Question 146

A DNA or RNA segment tagged with a radioactive molecule is called

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Correct answer: (B) probe

1 marks · 2023 · Set A

Question 147

The ABO blood group system exhibits

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Correct answer: (B) multiple allelism

1 marks · 2023 · Set A

Question 148

Heredity or inheritance of specific traits becomes clearer due to

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Correct answer: (B) Mendel’s work on green peas

1 marks · 2023 · Set A

Question 149

Which one is linked to evolution?

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

1 marks · 2023 · Set A

Question 150

In which year was Darwin’s Origin of Species published?

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Correct answer: (B) 1859

1 marks · 2023 · Set A

TRE2 — Language General Studies And Zoology