NEET 2020:  We are providing here some important questions. For upcoming exam NEET 2020 These questions are based on the topic of BIOLOGY section HUMAN REPRODUCTION (PART ONE) which are considered important for the upcoming test. All questions are provided with correct answers.

  • Human Reproduction (part one) 


Q.1) Sometimes the labor pain are less and uterine contraction have to be induced. What do you think the doctors, injected to facilitate delivery? 

(a) Oxytocin
(b) Progesterone and estrogen hormones
(c) FSh and LH
(d) Relaxin                                                

Answer: (a) Oxytocin


Q.2) Inhibition of uterine contraction ceases and bleeding and cramps of menstruation begin due to?

(a) Increase in level of LH
(b) Decrease in level of progesterone
(c) Decrease in level of FSH
(d) Increase in level of progesterone

Answer: (b) Decrease in level of progesterone 

Explanation: Low level of progesterone cause menstruation because progesterone is responsible for maintaining stability of endometrium of uterus


Q.3) Which one of the following is an incorrect match? 

(a) Endomertium: undergoes cyclical changes during menstrual cycle
(b) Uterus: birth canal 
(c) Myometrium: Exhibits strong contractions during delivary of the body
(d) Perimetrium: serosa of uterus

Answer: (b) Uterus: birth canal

Explanation: The cavity of cervix is called cervical canal.  Cervical canal + Vagina = Birth canal


Q.4) kidnays,  heart and gonads are formed from? 

(a) Inner cell mass
(b) mesoderm
(c) Ectoderm
(d) Endoderm

Answer:(b) mesoderm


Q.5)  Which one of the following is the incorrect match of the events occurring during menstrual cycle?

(a) Menstruation : Breakdown of endometrium and ovum is not fertilised
(b) Development of corpus luteum : Follicular phase and increased secretion of progesterone
(c) Proliferative phase : Rapid regeneration of endometrium and maturation of Graafian follicle
(d)Menstruation : Breakdown endometrium and ovum is not fertilised


Answer: (b) Development of corpus luteum : Follicular phase and increased secretion of progesterone

Explanation: Development of corpus luteum occurs in luteal or secretory phase


Q.6) Which of the following is a set of male accessory ducts?
(a) Rete testis, vasa efferentia, tubuli recti, oviduct
(b) Seminiferous tubules, vasa efferentia, epididymis and vas deferens
(c) Epididymis, ejaculatory duct, urethra (d) Rete testis, vasa efferentia, epididymis and vas deferens

Answer: (d) Rete testis, vasa efferentia, epididymis and vas deferens 


Explanation: The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens. Oviduct is accessory duct in females.


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Q.7) Why do all copulations not lead to fertilisation and pregnancy?
The root cause is Final
(a) Ovum and sperms are not transported simultaneously to the ampulla
(b) Due to numerous sperms and one ovum (c) Due to less progesterone
(d) Due to non-formation of corpus luteum


Answer: (a) Ovum and sperms are not transported simultaneously to the ampulla 


Explanation: Life span of sperm in male reproductive tract few weeks
Life span of sperm in female reproductive tract 48 to 72 hours.
Viability of secondary oocyte after its release is for 24 hours. 


Q.8) Which of the following enzyme helps sperm to penetrate zona pellucida? 

(a)Neuraminidase 

(b) Corona penetrating enzyme (CPE) 

(v) Hyaluronidase 

(d) Acrosin

Answer: (d) Acrosin

Explanation:Acrosin is also called zona lysin and digests 2ona pellucida. Hyaluronidase dissolves hyaluronic acid. CPE Rdissolves corona radiata.


Q.9) Which of the following is not the function of Sertoli cells Final Results (a) Release of androgen binding protein 

(b) Secretion of testosterone 

(c) Release of antimullerian factor 

(d) Regulation of spermatogenesis by releasing inhibin

Answer: (b) Secretion of testosterone 

Explanation: Leydig cells (interstitial cells) secrete testosterone upon stimulation by LH or ICSH.


Q.10)In human beings, pregnancy lasts for 9 months. The gestation period of dog, elephant, cat and cow is given below. Which of the following is wrong match?

(a) Elephant 607 - 641 days 

(b)Cow 330 - 345 days 

(c) Dog 60 - 65 days

(d) Cat 52 - 65 days

Answer: (b)Cow 330 - 345 days 

Explanation: Cow's gestation period = 279 to 292 days.

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