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Question (11)

QN008179

If a body cell contains 46 chromosomes, how many chromosomes will be present in a sperm cell?

(A) 92
(B) 46
(C) 23
(D) 44

Correct Answer: C

Explanation:

Sperm cells contain half the chromosome number, i.e. 23.

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Question (12)

QN008180

Which process produces gametes with half the chromosome number?

(A) Binary fission
(B) Budding
(C) Mitosis
(D) Meiosis

Correct Answer: D

Explanation:

Meiosis produces gametes with half the chromosome number.

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Question (13)

QN008181

A zygote is formed immediately after

(A) implantation
(B) fertilisation
(C) menstruation
(D) ovulation

Correct Answer: B

Explanation:

Zygote forms after fertilisation.

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Question (14)

QN008182

If a zygote undergoes 4 mitotic divisions, how many cells will be formed?

(A) 4
(B) 8
(C) 16
(D) 32

Correct Answer: C

Explanation:

Number of cells formed = 2^4 = 16.

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Question (15)

QN008183

Which structure protects testes and maintains lower temperature?

(A) Prostate gland
(B) Penis
(C) Scrotum
(D) Epidermis

Correct Answer: C

Explanation:

Scrotum maintains lower temperature for sperm formation.

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Question (16)

QN008184

Lower temperature in testes is necessary because

(A) digestion occurs there
(B) sperm formation requires cooler conditions
(C) blood circulation stops there
(D) fertilisation occurs there

Correct Answer: B

Explanation:

Sperm formation requires a temperature slightly below body temperature.

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Question (17)

QN008185

The seminal vesicles mainly help by

(A) producing eggs
(B) adding nourishment to sperms
(C) carrying urine
(D) forming embryos

Correct Answer: B

Explanation:

Seminal vesicles add nourishing fluid to sperms.

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Question (18)

QN008186

Which reproductive structure releases eggs in females?

(A) Uterus
(B) Oviduct
(C) Ovary
(D) Cervix

Correct Answer: C

Explanation:

Ovary releases eggs.

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Question (19)

QN008187

A menstrual cycle usually repeats after approximately

(A) 7 days
(B) 14 days
(C) 21–35 days
(D) 60 days

Correct Answer: C

Explanation:

Menstrual cycle usually repeats after 21–35 days.

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Question (20)

QN008188

Menstruation occurs when

(A) fertilisation takes place
(B) sperm reaches uterus
(C) egg remains unfertilised
(D) ovulation stops permanently

Correct Answer: C

Explanation:

Menstruation occurs when the egg is not fertilised.

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Question (11)

If a body cell contains 46 chromosomes, how many chromosomes will be present in a sperm cell?

Explanation:

Link:

Question (12)

Which process produces gametes with half the chromosome number?

Explanation:

Link:

Question (13)

A zygote is formed immediately after

Explanation:

Link:

Question (14)

If a zygote undergoes 4 mitotic divisions, how many cells will be formed?

Explanation:

Link:

Question (15)

Which structure protects testes and maintains lower temperature?

Explanation:

Link:

Question (16)

Lower temperature in testes is necessary because

Explanation:

Link:

Question (17)

The seminal vesicles mainly help by

Explanation:

Link:

Question (18)

Which reproductive structure releases eggs in females?

Explanation:

Link:

Question (19)

A menstrual cycle usually repeats after approximately

Explanation:

Link:

Question (20)

Menstruation occurs when

Explanation:

Link:

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