Human reproductive system 1000+ MCQ with answer for UPSC CDS

1. Normal sperm count is
A. 40 to 300 million per ml
B. 10 to 20 million per ml
C. < 10 million per ml
D. 200 million per ml
Answer : A

2. Human placenta is
A. Endothelial
B. Haemochorial
C. Epitheliochorial
D. Syndesmochorial
Answer : B

3. Mongolian idiocy due to trisomy in 21st chromosome is known as
A. Downs syndrome
B. Turners syndrome
C. Klinefelters syndrome
D. Triple x syndrome
Answer : A

4. Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan in the testis?
A. 7 days
B. 70 days
C. 7 months
D. 70 hours
Answer : B

5. In a semen analysis, the following is not acceptable as normal�
A. 25 % abnormal forms
B. 60% motility after 3 hours
C. Mild Alkaline reaction
D. Sperm count of 17 million per ml.
Answer : D

6. Which one occurs first in the human embryo
A. Neurogenesis
B. Cardiogenesis
C. Hepatogenesis
D. Osteogesis
Answer : A

7. Chorionic gonadotropin is secreted by ...
A. Pituitary
B. Ovary
C. Placenta
D. Uterus
Answer : C

8. What are the chances of a normal fertile couple having a baby in one year?
A. 40%
B. 80%
C. 20%
D. 50%
Answer : B

9. Which one is not the function of human placenta
A. Helps co2 and excretory products pass from foetus to mother's body
B. Helps o2 and nutrients from mother's body enter the foetus
C. Secretes hormones
D. It protects foetus from mechanical shocks
Answer : D

10. Pregnancy is ascertained by
A. Insemination
B. Copulation
C. Implantation
D. Capacitation
Answer : C

11. Human embryo is enclosed by a sac called
A. Scrotum
B. Ericardium
C. Placenta
D. Amniotic sac
Answer : D

12. The male hormone testosterone is secreted by
A. Sertoli cells
B. Leydig cells
C. Crypt cells
D. Semniferous tubules
Answer : B

13. Pregnancy test is confirmed by the presence of
A. Prolactin in urine
B. Relaxin in urine
C. H c g in urine
D. Fsh and lh in urine
Answer : C

14. Correct sequence of hormone secretion from beginning of menstruation is ...
A. FSH, progesterone, estrogen
B. Estrogen, fsh, progesterone
C. FSH, estrogen, progesterone
D. Estrogen, progesterone, FSH
Answer : C

15. Emergency contraceptives may prevent pregnancy if used within 72 hrs of
A. Menstruation
B. Fertilization
C. Ovulation
D. Coitus
Answer : D

16. A marriage between man with normal vision and colour blind woman will give birth to
A. Colour blind sons and 50% carrier daughter
B. 50% colourblind sons and 50% carrier daughter
C. Normal males and carrier daughters
D. Colour blind sons and carrier daughters.
Answer : D

17. Highly sophisticated procedure of injecting sperm directly into the ovum is
A. GIFT
B. ZIFT
C. ICSI
D. IUI
Answer : C

18. In human embryo, the digestive system develops from the
A. Epithelium
B. Mesoderm
C. Endoderm
D. Ectoderm
Answer : C

19. The rate of active movement of sperm is ...
A. 1.5 -3.0 mm/min
B. 1.5 - 3.0 cm/min
C. 1.5 -3.0 m/min
D. 1.5 -3.0 m/hr
Answer : A

20. Villi of human placenta develop from ..
A. Chorion
B. Allantois
C. Yolk sac
D. Amnion
Answer : A

21. Correct sequence in embryonic development is ..
A. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula
B. Fertilization -> zygote -> cleavage -> blastula -> morula -> gastrula
C. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula
D. Fertilization -> zygote -> gastrulae -> morula -> blastula -> cleavage
Answer : A

22. Fertility in women may be impaired by
A. Hypertension
B. Gall stones
C. Obesity
D. Short stature
Answer : C

23. In menstrual cycle the secretory phase is also known as
A. luteal phase and lasts for 6 days
B. Luteal phase and lasts for 13 days
C. Follicular phase and lasts for 13 days
D. Follicular phase and lasts for 6 days
Answer : B