NCERT CLASS 12 | TOPIC : HUMAN REPRODUCTION | QB-4 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 12 | TOPIC : HUMAN REPRODUCTION | QB-4 | NEET BIOLOGY ONLINE TEST

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It contains 58 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 1. Signals from fully developed foetus and placenta ultimately leads to a parturition which requires the release of [AIPMT MAINS 2010]

(a) Oestrogen from placenta (b) Oxytocin from maternal pituitary (c) Oxytocin from foetal pituitary (d) Relaxin from placenta

2 ➤ 2. Secretions from which one of the following are rich in fructose, calcium and some enzymes? [AIPMT MAINS 2010]

(a) Male accessory glands (b) Liver (c) Pancreas (d) Salivary glands

3 ➤ 3. In human female, the blastocyst [AIPMT MAINS 2010]

(a) Forms placenta even before implantation. (b) Gets implanted into uterus 3 days after ovulation. (c) Gets nutrition from uterine endometrial secretion only after implantation. (d) Gets implanted in endometrium by the trophoblast cells.

4 ➤ 4. Seminal plasma in human males is rich in [AIPMT PRE 2010]

(a) Fructose and calcium (b) Glucose and calcium (c) DNA and testosterone (d) Ribose and potassium

5 ➤ 5. Sertoli cells are found in [AIPMT PRE 2010]

(a) Ovaries and secrete progesterone (b) Adrenal cortex and secrete adrenalin (c) Seminiferous tubules and provide nutrition to germ cells (d) Pancreas and secrete cholecystokinin

6 ➤ 6. Vasa efferentia are the ductules leading from [AIPMT PRE 2010]

(a) Testicular lobules to rete testis (b) Rete testis to vas deferens (c) Vas deferens to epididymis (d) Epididymis to urethra

7 ➤ 7. The signals for parturition originate from [AIPMT PRE 2010]

(a) Placenta only (b) Placenta as well as fully developed foetus (c) Oxytocin released from maternal pituitary (d) Fully developed foetus only

8 ➤ 8. The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy? [AIPMT PRE 2010]

(a) Fourth month (b) Fifth month (c) Sixth month (d) Third month

9 ➤ 9. The second maturation division of the mammalian ovum occurs [AIPMT PRE 2010]

(a) Shortly after ovulation before the ovum makes entry into the fallopian tube. (b) Until after the ovum has been penetrated by a sperm. (c) Until the nucleus of the sperm has fused with that of the ovum. (d) In the Graafian follicle following the first maturation division.

10 ➤ 10. Which one of the following statements about human sperm is correct? [AIPMT PRE 2010]

(a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization. (b) The sperm lysins in the acrosome dissolves the egg envelope facilitating fertilization. (c) Acrosome serves as a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function.

11 ➤ 11. Which one of the following statements about morula in humans is correct? [AIPMT PRE 2010]

(a) It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA. (b) It has far less cytoplasm as well as less DNA than in an uncleaved zygote. (c) It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote. (d) It has more cytoplasm and more DNA than an uncleaved zygote.

12 ➤ 12. The part of fallopian tube closest to the ovary is [AIPMT PRE 2010]

(a) Isthmus (b) Infundibulum (c) Cervix (d) Ampulla

13 ➤ 13. The figure given below depicts a diagrammatic sectional view of the female reproductivesystem of humans. Which one set of three parts out of A to F have been correctly identified?

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(a) C - Infundibulum, D - Fimbriae, E – Cervix (b) D - Oviductal funnel, E - Uterus, F – Cervix (c) A - Perimetrium, B - Myometrium, C - Fallopian tube (d) B - Endometrium, C - Infundibulum, D - Fimbriae

14 ➤ 14. The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for [AIPMT PRE 2011]

(a) Escaping any possible compression by the visceral organs. (b) Providing more space for the growth of epididymis. (c) Providing a secondary sexual feature for exhibiting the male sex. (d) Maintaining the scrotal temperature lower than the internal body temperature.

15 ➤ 15. What happens during fertilization in humans after many sperms reach close to the ovum? [AIPMT MAINS 2011]

(a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except the one nearest to the ovum lose their tails. (c) Cells of corona radiata trap all the sperms except one. (d) Only two sperms nearest to the ovum penetrate zona pellucida.

16 ➤ 16. On which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH surge) normally occurs? [AIPMT MAINS 2011]

(a) 14th day (b) 20th day (c) 5th day (d) 11th day

17 ➤ 17. The secretory phase in the human menstrual cycle is also called [AIPMT MAINS 2012]

(a) Follicular phase lasting for about 6 days. (b) Luteal phase and lasts for about 13 days. (c) Follicular phase and lasts for about 13 days. (d) Luteal phase and lasts for about 6 days.

18 ➤ 18. Identify the human development stage shown below as well as the related right place of its occurrence in a normal pregnant women and select the right option for the two together: Developmental stage Site of occurrence

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(a) Blastula End part of fallopian tube (b) Blastocyst Uterine wall (c) 8-celled morula Starting point of fallopian tube (d) Late morula Middle part of fallopian tube

19 ➤ 19. Which one of the following statements is false with respect to the viability of mammalian sperm? [AIPMT PRE 2012]

(a) Sperm is viable for only up to 24 hours. (b) Survival of sperm depends on the pH of the medium and is more active in alkaline medium. (c) Viability of sperm is determined by its motility. (d) Sperms must be concentrated in a thick suspension.

20 ➤ 20. Signals for parturition originates from [AIPMT PRE 2012]

(a) Both placenta as well as fully developed foetus (b) Oxytocin released from maternal pituitary (c) Placenta only (d) Fully developed foetus only

21 ➤ 21. In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was [AIPMT PRE 2012]

(a) High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo. (b) High level of circulating HCG to stimulate endometrial thickening. (c) High level of FSH and LH in uterus to stimulate endometrial thickening. (d) High level of circulating HCG to stimulate oestrogen and progesterone synthesis.

22 ➤ 22. What is the correct sequence of sperm formation? [AIPMT 2013]

(a) Spermatid, spermatocyte, spermatogonia, spermatozoa (b) Spermatogonia, spermatocyte, spermatozoa (c) Spermatogonia, spermatozoa, spematocyte (d) Spermatogonia, spermatocyte, spermatid, spermatozoa

23 ➤ 23. Menstrual flow occurs due to the lack of [AIPMT 2013]

(a) Progesterone (b) FSH (c) Oxytocin (d) Vasopressin

24 ➤ 24. Which one of the following is not the function of placenta? [AIPMT 2013]

(a) Facilitates supply of oxygen and nutrients to embryo. (b) Secretes oestrogen. (c) Facilitates the removal of carbon dioxide and waste material from embryo. (d) Secretes oxytocin during parturition.

25 ➤ 25. The shared terminal duct of the reproductive and urinary system in the human male is [AIPMT 2014]

(a) Urethra (b) Ureter (c) Vas deferens (d) Vasa efferentia

26 ➤ 26. The main function of mammalian corpus luteum is to produce [AIPMT 2014]

(a) Oestrogen only (b) Progesterone (c) Human chorionic gonadotropin (d) Relaxin only

27 ➤ 27. Select the correct option describing gonadotropin activity in a normal pregnant female. [AIPMT 2014]

(a) High level of FSH and LH stimulates the thickening of endometrium. (b) High level of FSH and LH facilitates implantation of the embryo. (c) High level of hCG stimulates the synthesis of oestrogen and progesterone. (d) High level of hCG stimulates the thickening of endometrium.

28 ➤ 28. Capacitation refers to changes in the [AIPMT 2015]

(a) Sperm before fertilization (b) Ovum before fertilization (c) Ovum after fertilization (d) Sperm after fertilization

29 ➤ 29. Which of these is not an important component of initiation of parturition in humans? [AIPMT 2015]

(a) Increase in oestrogen and progesterone ratio (b) Synthesis of prostaglandins (c) Release of oxytocin (d) Release of prolactin

30 ➤ 30. Which of the following cells during gametogenesis is normally diploid? [AIPMT 2015]

(a) Primary polar body (b) Spermatid (c) Spermatogonia (d) Secondary polar body

31 ➤ 31. Hysterectomy is the surgical removal of [AIPMT 2015]

(a) Uterus (b) Prostate gland (c) Vas deferens (d) Mammary glands

32 ➤ 32. Which of the following events is not associated with ovulation in human female? [RE-AIPMT 2015]

(a) Full development of Graafian follicle (b) Release of secondary oocyte (c) LH surge (d) Decrease in estradiol

33 ➤ 33. Ectopic pregnancies are referred to as [RE-AIPMT 2015]

(a) Implantation of embryo other than uterus (b) Implantation of defective embryo in the uterus (c) Pregnancies terminated due to hormonal imbalance (d) Pregnancies with genetic abnormality

34 ➤ 34. Which of the following layers in an antral follicle is acellular? [RE-AIPMT 2015]

(a) Theca interna (b) Stroma (c) Zona pellucida (d) Granulosa

35 ➤ 35. In human female, meiosis-II is not completed until? [RE-AIPMT 2015]

(a) Fertilization (b) Uterine implanation (c) Birth (d) Puberty

36 ➤ 36. Fertilization in humans is practically feasible only if [NEET - I, 2016]

(a) The sperms are transported into vagina just after the release of ovum in fallopian tube. (b) The ovum and sperms are transported simultaneously to ampullary–isthmic junction of the fallopian tube. (c) The ovum and sperms are transported simultaneously to ampullary–isthmic junction of the cervix. (d) The sperms are transported into cervix within 48 hrs of release of ovum in uterus.

37 ➤ 37. Select the incorrect statement: [NEET - I, 2016]

(a) FSH stimulates the sertoli cells which help in spermiogenesis (b) LH triggers ovulation in ovary (c) LH and FSH decrease gradually during the follicular phase (d) LH triggers secretion of androgens from the Leydig cells

38 ➤ 38. Which of the following depicts the correct pathway of transport of sperms? [NEET - II, 2016]

(a) Rete testis → Epididymis → Efferent ductules → Vas deferens (b) Rete testis → Vas deferens → Efferent ductules → Epididymis (c) Efferent ductules → Rete testis → Vas deferens → Epididymis (d) Rate Testis → Efferent ductules → Epididymis → Vas deferens

39 ➤ 39. Match the column- I With Column – II and select the correct option using the codes given below: [NEET - II, 2016] A. Mono pubis 1. Embryo formation B. Antrum 2. Sperm C. Trophectoderm 3. Female external genitalia D. Nebenkern 4. Graafian follicle

(a) A:3, B:4, C:1, D:2 (b) A:2, B:1, C:4, D:2 (c) A:1, B:4, C:3, D:2 (d) A:3, B:4, C:2, D:1

40 ➤ 40. Several hormones like hCG, hPL, estrogen, progesterone are produced by [NEET - II, 2016]

(a) Placenta (b) Fallopian tube (c) Pituitary (d) Ovary

41 ➤ 1. Choose the incorrect statement from the following:

(a) In birds and mammals internal fertilization takes place. (b) Colostrum contains antibodies and nutrients. (c) Polyspermy in mammals is prevented by the chemical changes in the egg surface. (d) In humans, female implantation occurs almost seven days after fertilization.

42 ➤ 2. Identify the correct statement from the following:

(a) High levels of oestrogen triggers the ovulatory surge. (b) Oogonial cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards. (c) Sperms released from seminiferous tubules are highly motile. (d) Progesterone level is high during the post ovulatory phase of menstrual cycle.

43 ➤ 3. Spot the odd one out from the following structures with reference to the male reproductive system.

(a) Rete testis (b) Epididymis (c) Vasa efferentia (d) Isthmus

44 ➤ 4. Seminal plasma, the fluid part of semen, is contributed by i. Seminal vesicle ii. Prostate iii. Urethra iv. Bulbourethral gland

(a) i and ii (b) i, ii and iv (c) ii, iii and iv (d) i and iv

45 ➤ 5. Spermiation is the process of the release of sperms from

(a) Seminiferous tubules (b) Vas deferens (c) Epididymis (d) Prostate gland

46 ➤ 6. Mature Graafian follicle is generally present in the ovary of a healthy human female around

(a) 5 to 8 days of menstrual cycle (b) 11 to 17 days of menstrual cycle (c) 18 to 23 days of menstrual cycle (d) 24 to 28 days of menstrual cycle

47 ➤ 7. 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.

48 ➤ 8. Which one of the following is not a male accessory gland?

(a) Seminal vesicle (b) Ampulla (c) Prostate (d) Bulbourethral gland

49 ➤ 9. The immature male germ cell undergoes division to produce sperms by the process of spermatogenesis. Choose the correct option from below with reference to the above statement.

(a) Spermatogonia have 46 chromosomes and always undergo meiotic cell division. (b) Primary spermatocytes divide by mitotic cell division. (c) Secondary spermatocytes have 23 chromosomes and undergo second meiotic division. (d) Spermatozoa are transformed into spermatids.

50 ➤ 10. Match between the following representing parts of the sperm and their functions and choose the correct option. A. Head i. Enzymes B. Middle piece ii. Sperm motility C. Acrosome iii. Energy D. Tail iv Genetic material

(a) A-ii, B-iv, C-i, D-iii (b) A-iv, B-iii, C-i, D-ii (c) A-iv, B-i, C-ii, D-iii (d) A-ii, B-i, C-iii, D-iv

51 ➤ 11. Which among the following has 23 chromosomes?

(a) Spermatogonia (b) Zygote (c) Secondary oocyte (d) Oogonia

52 ➤ 12. Match the following and choose the correct options: 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-iv, C-ii, D-i (c) A-iii, B-i, C-ii, D-iv (d) A-ii, B-iv, C-iii, D-i

53 ➤ 13. Which of the following hormones is not secreted by human placenta?

(a) hCG (b) Oestrogens (c) Progesterone (d) LH

54 ➤ 14. The vas deferens receives duct from the seminal vesicle and opens into urethra as

(a) Epididymis (b) Ejaculatory duct (c) Efferent ductule (d) Ureter

55 ➤ 15. 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 urino genial duct

56 ➤ 16. Morula is a developmental stage

(a) Between the zygote and blastocyst (b) Between the blastocyst and gastrula (c) After the implantation (d) Between implantation and parturition

57 ➤ 17. The membranous cover of the ovum at ovulation is

(a) Corona radiata (b) Zona radiata (c) Zona pellucida (d) Chorion

58 ➤ 18. Identify the odd one from the following:

(a) Labia minora (b) Fimbriae (c) Infundibulum (d) Isthmus

Your Score is

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