BIOLOGY XII
CHAPTER-HUMAN REPRODCUTION
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PART A
1. 10 oogonial cells yield 10 primary oocytes, then how many ova are produced on completion of Oogenesis?
a) 5
b) 10
c) 20
d) 40
2. The part of fallopian tube closest to the ovary is
a) isthmus
b) infundibulum
c) cervix
d) ampulla
3. The secretory phase in the human menstrual cycle is also called
a) Luteal phase and lasts for about 6 days
b) Follicular phase and lasts for about 6 days
c) Luteal phase and lasts for about 13 days
d) Follicular phase and lasts for about 13 days
4. Choose the correct statements
i. Notochord is replaced by vertebral column in humans
ii. Limbs and digits are developed by the end of 2nd month of pregnancy
iii. Heart is formed in the 1st Trimester
iv. Foetal movements occur in the 2nd Trimester
v. Fully matured foetus and placenta give foetal ejection reflex
a) i, iii b) i, ii, iii c) i, ii, iii, v d) i, ii, iii, iv, v
5. At what stage of life is oogenesis initiated in a human female?
a) At puberty
b) During menarche
c) During menopause
d) During embryonic development
6. first movements of the fetus and appearance of hair on its head are usually observed during which month of pregnancy?
a) Fourth month
b) Fifth month
c) Sixth month
d) Third month
7. Layers of an ovum from ooplasm to outside is
a) corona radiata, zona pellucida and vitelline membrane and perivitelline space
b) zona pellucida, corona radiata and vitelline membrane and perivitelline space
c) vitelline membrane, perivitelline space, zona pellucida and corona radiata
d) zona pellucida, vitelline membrane and corona radiate and perivitelline space
8. First polar body is formed at which stage of oogenesis in ovary of human females?
a) 1st meiosis
b) 2nd mitosis
c) 1st mitosis
d) Differentiation
9. The sperms undergo physiological maturation, acquiring increased motility and fertilizing capacity in
a) seminiferous tubules
b) vasa efferentia
c) epididymis
d) vagina
10. The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called
a) spermiogenesis
b) spermatogenesis
c) spermatocytogenesis
d) spermiation
11. Which of the following groups of cells in the male gonad, represent haploid cells?
a) Spermatogonial cells
b) Germinal epithelial cells
c) Secondary spermatocytes
d) Primary spermatocytes
12. How many sperms are formed from a 20 secondary spermatocyte and 10 primary spermatocytes
a) 40, 10
b) 40, 40
c) 20, 40
d) 40, 20
13. Which of the following hormones is not a secretory product of human placenta?
a) Human chorionic gonadotropin
b) Prolactin
c) Estrogen
d) Progesterone
14. What is true about cleavage in the fertilized egg in humans?
a) It starts while the fertilized egg is in Fallopian tube
b) It starts when the egg reaches uterus
c) It is meroblastic
d) It is identical to the normal meiosis
15. During oogenesis, each diploid cell produces
a) four functional eggs
b) two functional eggs and two polar bodies
c) one functional egg and three polar bodies
d) four functional polar bodies.
16. Bartholin’s glands are situated
a) on the either side of vagina in human females
b) on either side of urethral origin in human males
c) on either side of urethral opening in human males
d) on either side of Fallopian tube in human females
17. The head of the epididymis at the head of the testis is called
a) cauda epididymis
b) corpus epididymis
c) caput epididymis
d) gubernaculum.
18. Sertoli cells are regulated by the pituitary hormone known as
a) LH b) FSH c) GH d) prolactin
19. The vas deferens receives duct from the seminal vesicle and opens into urethra as
a) Epididymis
b) ejaculatory duct
c) efferent ductile
d) ureter
20. Acrosomal reaction of the sperm occurs due to
a) Its contact with zona pellucida of the ova
b) reactions within the uterine environment of the female
c) reactions within the epididymal environment of the male
d) androgens produced in the uterus.
21. Ovulation in the human female normally takes place during the menstrual cycle
a) at the mind secretory phase
b) just before the end of the secretory phase
c) at the beginning of the proliferative phase
d) at the end of the proliferative phase
22. Which of the following statements about the mammalian blastocyst is not true?
a) The trophoblast of blastocyst gives rise to the embryo proper.
b) blastocoel is the space present in blastocyst
c) The blastocyst implants in the mother’s uterus.
d) Blastocyst is the stage between morula and gastrula
23. Which of the following depicts the correct pathway of transport of sperms?
a) Rete testis →Vasa efferens → Epididymis→ vas deferens
b) Rete testis→ Epididymis → Efferent ductules→ vas deference
c) Rete testis→ Vas deference → Efferent ductules→ Epididymis
d) Efferent ductules →Rete testis→ Vas deference→ Epididymis
24. Ectopic pregnancies are referred to as
a) pregnancies with genetic abnormality
b) implantation of embryo at site other than uterus
c) implantation of defective embryo in the uterus
d) pregnancies terminated due to the hormonal imbalance
25. The shared terminal duct of the reproductive and urinary system in the human male is
a) Urethra b) Ureter c) Vas deferens d) Vasa efferentia
26. The main function of mammalian corpus luteum is to produce
a) estrogen only a) progesterone
c) human chorionic gonadotropin d) relaxin only
27. Signals for parturition originate from
a) both placenta as well as fully developed fetus
b) oxytocin released from maternal pituitary
c) placenta only
d) fully developed fetus only
28. The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
a) spermatocyte – spermatogonia – spermatid – sperms
b) spermatogonia – spermatocyte – spermatid -sperms
c) spermatid-spermatocyte-spermatogonia -sperms
d) spermatogonia-spermatid-spermatocyte –sperms
29. Assertion: In human male, testes are extra-abdominal and lie in scrotal sacs.
Reason: Scrotum acts as thermoregulatory and keeps testicular temperature lower by 2°C for normal spermatogenesis.
a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
c) If the assertion is true but the reason is false
d) If both the assertion and reason are false
30. What structure gets implanted on the wall on the uterus during embryonic development?
a) b) c) d)
31. The glandular tissue of each breast is divided into
a) 10-12 mammary lobes b) 15-20 mammary lobes
c) 23-25 mammary lobes d) 25-30 mammary lobes
32. Which group represents external genitalia of human female?
a) Labium minora, labium majora, vagina
b) Labium minora, labium majora, oviduct
c) Labium minora, labium majora, cervix
d) Labium minora, labium majora, clitoris
33. The females of placental mammals exhibit cyclical changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase. In non-primate mammals it is known as
a) Oestrus cycle
b) Menstrual cycle
c) Reproductive cycle
d) Sexual cycle
34. __________ is formed just after fertilization.
a) Morula b) Blastula c) Zygote d) Foetus
35. How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte
a) Four, One b) Four, Four c) One, One d) None of these
PART B
36. Clitoris in females is
a) Homologous to penis b) analogous to penis
c) Functional penis in female d) non-functional
37. Urethral meatus refers to the:
a) Urinogenital duct
b) Opening of vas deferens into urethra
c) External opening of the urinogenital duct
d) Muscles surrounding the urinogenital duct
38. Match the following and choose the correct options:
Column I Column II
(A) Trophoblast (i) Embedding of blastocyst in the endometrium
(B) Cleavage (ii) Group of cells that would differentiate as embryo
(C) Inner cell mass (iii) Outer layer of blastocyst attached to the endometrium
(D) Implantation (iv) Mitotic division of zygote
a) A-ii, B-i, C-iii, D-iv b) A-iii, B-i, C-ii, D-iv
c) A-iii, B-iv, C-ii, D-i d) A-ii, B-iv, C-iii, D-i
39. Assertion: All copulations do not lead to fertilisation and pregnancy.
Reason: Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary-isthmic junction
a) If both assertion and reason are true and reason is the correct explanation of assertion.
b) If both assertion and reason are true, but reason is not the correct explanation of assertion.
c) If assertion is true, but reason is false.
d) If assertion is false but reason is true
40. The limbs and digits are formed
a) At the ending of second month
b) At the ending of 18 weeks
c) At the ending of second trimester
d) At the end of third trimester
41. Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
a) Only one X chromosome b) One X and one Y chromosome
c) Two X chromosomes d) Only one Y chromosome
42. Assertion (A): Formation of sperm takes place in seminiferous tubules of testes.
Reason (R): Seminiferous tubules is lined with male germ cells only.
a) Both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of
Assertion (A).
b) Both Assertion (A) and Reason (R) are true but Reason (R) is not correct explanation of
Assertion (A).
c) Assertion (A) is true but Reason (R) is false.
d) Assertion (A) is false but Reason (R) is true.
43. Which match (es) is/are incorrect?
(a) Spermatogonia – 46 chromosomes
(b) Spermatid – 46 chromosomes
(c) Sperm – 23 chromosomes
(d) Secondary spermatocyte – 23 chromosomes
a) Only (b) b) (a), (b) and (c) c) (c) and (d) d) (a), (b), (c) and (d)
44. No menstruation cycle occurs;
(a) before puberty.
(b) after 50 years.
(c) during lactation.
(d) between puberty and menopause.
a) (a) and (b)
b) (a), (b) and (c)
c) (c) and (d)
d) (a), (b), (c) and (d)
45. Which of the following hormones is not a secretion product of human placenta?
a) Human chorionic gonadotropin b) Vasopressin
c) Estrogen d) Progesterone
46. In the event of pregnancy, the corpus luteum persists under the influence of;
a) LH
b) FSH
c) chorionic gonadotropin
d) progesterone
47. Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of;
a) estrogen from placenta
b) oxytocin from maternal pituitary
c) oxytocin from foetal pituitary
d) relaxin from Leydig cells
48. Which of the following has same ploidy as that of spermatid?
(A) Secondary oocyte; (B) Secondary spermatocyte; (C) Ootid; (D) Ova
a) (C) and (D)
b) (A) and (D)
c) Only (D)
d) (A), (B), (C) and (D)
49. At which phase, both LH and FSH attain a peak level?
a) Menstrual phase
b) Follicular phase
c) Ovulatory phase
d) Luteal phase
50. Which of the following does not occur during implantation?
a) The embryo secretes enzymes that digest away part of the endometrium.
b) The embryo is drawn into the endometrium and becomes surrounded by it.
c) The embryo forms finger like projections that burrow into the uterine wall.
d) The embryo develops into a hollow ball with a fluid filled interior.
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ANSWER KEY- HUMAN REPRODUCTION
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Q. No Key Q. No Key Q. No Key Q. No Key Q. No Key
1 B 11 C 21 D 31 B 41 C
2 B 12 B 22 D 32 D 42 C
3 C 13 B 23 A 33 A 43 A
4 D 14 A 24 B 34 C 44 B
5 D 15 C 25 A 35 A 45 B
6 B 16 A 26 A 36 A 46 A
7 C 17 C 27 A 37 C 47 B
8 A 18 B 28 B 38 C 48 D
9 C 19 B 29 A 39 A 49 C
10 D 20 A 30 D 40 A 50 A