NEET PREVIOUS YEARS QUESTIONS

Match the items given in column I with those in column II and select the correct option given below [2018]

Column I Column II

A. Proliferative phase I. Breakdown of endometrial lining

B. Secretory phase II. Follicular phase

C. Menstruation III. Luteal phase

A B C A B C A B C A B C

(a) III II I (b) I III II (c) III I II (d) II III I

2. Hormones secreted by the placenta to maintain pregnancy are: [2018]

(a) hCG, hPL, progestogens, prolactin. (b)hCG, hPL, estrogens, relaxin, oxytocin.

3. The amnion of mammalian embryo is derived from: [2018]

(a) Ectoderm and mesoderm. (b) Endoderm and mesoderm.

4. The difference between spermiogenesis and spermiation is that [2018]

(a) in spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.

(b) in spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.

(c) in spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.

(d) in spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.

5. Capacitation occurs in [2017]

(a) epididymis. (b) vas deferens. (c) female reproductive tract. (d) rete testis.

6. Select the incorrect statement. [2016]

(a) FSH stimulates the sertoli cells which help in spermiogenesis. (b) LH triggers ovulation in ovary.

(d) LH triggers secretion of androgens from the Leydig cells.

7. Fertilisation in humans is practically feasible only if [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.

(d) the sperms are transported into cervix within 48 hrs of release of ovum in uterus.

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

(a) Synthesis of prostaglandins. (b) Release of oxytocin.

9. In human females, meiosis-II is not complete until ________. [2015]

(a) fertilisation (b) uterine implantation (c) birth (d) puberty

10. Which of the following events is not associated with ovulation in human female? [2015]

(a) Full development of Graafian follicle (b) Release of secondary oocyte

11. Which of the following cells during gametogenesis is normally diploid? [2015]

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

12. The main function of mammalian corpus luteum is to produce: [2014]

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

13. The shared terminal duct of the reproductive and urinary system in the human male is ______ [2014]

(a) urethra (b) ureter (c) vas deferens (d) vasa efferentia

14. Select the correct sequence of transport of sperm cells in male reproductive system [NEET-2019]

(1) Testis Epididymis Vasa efferentia Rete testis Inguinal canal Urethra

(2) Seminiferous tubules Rete testis Vasa efferentia Epididymis Vas deferens Ejaculatory duct Urethra Urethral meatus

(3) Seminiferous tubules Vasa efferentia EpididymisInguinal canal Urethra

(4) Testis Epididymis Vasa efferentiaVas deferensEjaculatory duct Inguinal canalUrethra Urethral meatus

15. Extrusion of second polar body from egg nucleus occurs : [NEET-2019]

(1) after entry of sperm but before fertilization (2) after fertilization

(3) before entry of sperm into ovum (4) simultaneously with first cleavage

16. Select the correct sequence of events : [NEET-2019 ODISSA]

(1) Gametogenesis Gamete transfer Syngamy Zygote Cell division (Cleavage) Cell differentiation Organogenesis

(2) Gametogenesis Gamete transfer Syngamy Zygote Cell division (Cleavage) Organogenesis Cell differentiation

(3) Gametogenesis Syngamy Gamete transfer Zygote Cell division (Cleavage) Cell differentiation Organogenesis

(4) Gametogenesis Gamete transfer Syngamy Zygote Cell differentiation Cell division

(Cleavage) Organogenesis

17. Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex ? [NEET-2019 ODISSA]

(1) Estrogen (2) Prolactin (3) Oxytocin (4) Relaxin

18. No new follicles develop in the luteal phase of the menstrual cycle because

[NEET-2019 ODISSA]

(1) Follicles do not remain in the ovary after ovulation

(2) FSH levels are high in the luteal phase

(3) LH levels are high in the luteal phase

(4) Both FSH and LH levels are low in the luteal phase

19. In human beings, at the end of 12 weeks (first trimester) of pregnancy, the following is observed:

[NEET-2020 COVID]

(1) Eyelids and eyelashes are formed

(2) Most of the major organ systems are formed

(3) The head is covered with fine hair

(4} Movement of the foetus

20. Match the following columns and select the correct option : [NEET-2020 COVID]

Column – I Column – II

(a) Ovary (i) Human chorionic Gonadotropin

(b) Placenta (ii) Estrogen &Progesterone

(d) Leydig cells (iv) Progesterone only

(1) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i) (2) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

(3) (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv) (4) (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

21. Select the correct option of haploid cells from the following groups : [NEET-2020 COVID]

(1) Primary oocyte, Secondary oocyte, Spermatid

(2) Secondary spermatocyte, First polar body, Ovum

(3) Spermatogonia, Primary spermatocyte, Spermatid

(4) Primary spermatocyte, Secondary spermatocyte, Second polar body

22. Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups [NEET-2020]

1) Allele ‘i’ does not produce any sugar

2) The gene (I) has three alleles

3) A person will have only two of the three alleles

4) When I^A and I^B are present together they express same type of sugar

23. Which of the following hormone levels cause release of ovum (ovulation ) from the graffian follicle? [NEET-2020]

1) Low concentration of FSH 2) High concentration of Estrogen

3) High concentration of Progesterone 4) Low concentration of LH

24. Mach the following columns and select the correct option [NEET-2020] Column – I Column – II

(a) Placenta (i) Androgens

(b) Zona pellucida (ii) Human Chorionic Gonadatropin (hCG)

(d) Leydig cells (iv) Lubrication of the Penis

(a) (b) (c) (d) (a) (b) (c) (d)

1)(ii) (iii) (iv) (i) 2)(iv) (iii) (i) (ii)

3)(i) (iv) (ii) (iii) 4)(iii) (ii) (iv) (i)

25. Receptors for sperm binding in mammals are present on: [NEET-2021]

1) Vitelline membrane 2) Perivitelline space 3) Zone pellucida 4) Corona radiate

26. Which of these is not an important component of initiation of parturition in humans?

                                                                                                                                                            [NEET-2021]
1) Synthesis of prostaglandins         2) Release of Oxytocin
3) Release of Prolactin                       4) Increase in oestrogen and progesterone ratio

27. Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?

[NEET-2021]

1) Corpus luteum 2) Foetus 3) Uterus 4) Graafian follicle

28. Given below are two statements: [NEET-2022]

Statement I: The release of sperms into the seminiferous tubules is called spermiation.

Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia.

In the light of the above statements, choose the most appropriate answer from the options given below:

1) Both statements I and Statements II are correct

2) Both statement I and Statement II are incorrect

3) Statement I is correct but Statement II is incorrect

4) Statement I is incorrect but Statement II is correct

29. Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis? [NEET-2022]

a) It results in the formation of haploid gametes

b) Differentiation of gamete occurs after the completion of meiosis

c) Meiosis occurs continuously in a mitotically dividing stem cell population

d) It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary

e) It is initiated at puberty

Choose the most appropriate answer from the options given below:

1) (c) and (e) only 2) (b) and (c) only

3) (b), (d) and (e) only 4) (b), (c) and (e) only

30. At which stage of life the oogenesis process is initiated? [NEET-2022]

1) Puberty 2) Embryonic development stage

3) Birth 4) Adult

NEET PREVIOUS YEARS QUESTIONS-EXPLANATIONS

1. (d) 2. (d) 3. (a) 4. (c) 5. (c) 6. (c) 7. (b) 8. (c)

9. (a) Meiosis-II does not complete untill fertilisation occurs in females (in human being).

10. (d)

11. (b) During gametogenesis, spermatogonia are diploid because of undergoing the process of meiosis.

12. (b)

13. (a) Urethra is a tube that connects the urinary bladder to the genitals for the removal of fluids from the body. The urethra travels through the penis, and carries semen as well as urine.

22. ABO blood groups are controlled by the gene I. The gene I has three alleles I^A, I^B and i. The alleles I^A and I^B produce different form of the sugar while allele i does not produce any sugar.

23. High concentration of Estrogen cause the release of ovum (ovulation ) from the graffian follicle.

24. (a) Placenta secretes human chorionic gonadotropin (hCG)

(b) Zona pellucida is a primary egg membrane secreted by the secondary oocyte

(d) Leydig cells synthesise and secrete testicular hormones called androgens

25. Receptors for sperm binding in mammals are present on zona pellucida

26. * At the end of gestation, the completely developed foetus is expelled out. This process is called parturition.

* Parturition is controlled by a complex neuroendocrine mechanism.

* Estrogen and progesterone ratio increases as estrogen levels rise significantly.

* Prostaglandins, which stimulate uterine contractions are also produced that act on myometrium.

* Oxytocin, the main hormone, also called as birth hormone is released by maternal pituitary, which brings about strong uterine contractions.

* Prolactin is a lactation hormone that has no role in initiation of parturition

27. The hormone relaxin is produced in the later phase of pregnancy. It is produced by the ovary.

* Graafian follicle is not formed when the woman is pregnant.

* Uterus and foetus do not produce relaxin.

* Relaxin is produced by the corpus luteum present in the ovary. Ruptured Graafian follicle is called corpus luteum, which has endocrine function

28. I) Spermiation which is a process sperms are released from seminiferous tubule.

II) Spermiogenesis is promoted by FSH where seprmatids convert into sperms

29 Statements b, c, & e are exclusively for spermatogenesis

30 Oogenesis is initiated at embryonic stage