NCERT – MCQs on Human Reproduction of Class 12 Biology

76 The ovaries maintain their position by ....

1 Series of ligaments

2 Muscular filament

3 Epithelium layer

4 Connective leyer

View Answer

Answer: Series of ligaments

77 Ovarian stroma is composed by ..... ?

1 Cortex

2 Medulla

3 Follicles

4 (1) and (2) both

View Answer

Answer: (1) and (2) both

78 Which hormones is produced by corpus luteum ?

1 Estrogen

2 Testosterone

3 Progesterone

4 (1) and (2) both

View Answer

Answer: Progesterone

79 The distal narrow end of the uterus is called........

1 Vagina

2 Cervix

3 Hymen

4 (1) and (3) both

View Answer

Answer: Cervix

80 What is called the process of gamete formation in the sexually reproducing animals ?

1 Spermatogenesis

2 Oogenesis

3 Gametogenesis

4 None of this

View Answer

Answer: Gametogenesis

81 In spermatogenesis which cells are produced at the end of the maturation phase ?

1 Primary spermatocyte

2 Spermatogonia

3 Secondary spermatocyte

4 Spermatids

View Answer

Answer: Spermatids

82 These form a middle piece of the sperm

1 Mitochondria

2 Golgicomplex

3 Ribosomes

4 Nucleus

View Answer

Answer: Mitochondria

83 Which stage of cell at the time of ovulation ?

1 Secondary oocyte

2 First polar body

3 Secondary polar body

4 Primary oocyte

View Answer

Answer: Secondary oocyte

84 In menstrual cycle on which day ovulation occurs ?

1 on 12^th day

2 on 13^th day

3 on 14^th day

4 on 15^th day

View Answer

Answer: on 14^th day

85 The sperms emptied in the vagina start moving towards oviducts through the uterus which is helpful in their locomotion

1 Contraction of uterine wall

2 The slimy secretion of oviduct wall

3 Contraction vagina passage

4 All of these

View Answer

Answer: All of these

86 Which cells secrete the enzymes for make implantation of embryo possible ?

1 Trophoblast

2 Blastomere

3 Outer layer of blastocyst

4 Outer layer of uterus

View Answer

Answer: Trophoblast

87 Which hormones are not produced by placenta ?

1 hcG

2 hpL

3 estrogens

4 relaxin

View Answer

Answer: relaxin

88 After delivery mammary gland start producing milk, In milk which necessary substance is present for immunity ?

1 Lactose

2 Protein

3 Fat

4 Antibodies

View Answer

Answer: Antibodies

89 Which of the follwing is an accessory reproductive gland in male mammals.

1 Prostate gland

2 Gastric gland

3 Mushroom shaped gland

4 Inguinal gland

View Answer

Answer: Prostate gland

90 In the absence of acrosome the sperm _______.

1 Cannot get food

2 Cannot penetrate the egg

3 Cannot swim

4 Cannot get energy

View Answer

Answer: Cannot penetrate the egg

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