Human Reproduction PYQs Set 1 (PDF)

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Mere Teacher · Previous Year Questions NEET Biology · Human Reproduction · Set 1 (Q1-30)
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1. $Which one of the following statements about morula in humans is correct?$ (1) $It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA.$ (2) $It has far less cytoplasm as well as less DNA than in an uncleaved zygote.$ (3) $It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote.$ (4) $It has more cytoplasm and more DNA than an uncleaved zygote.$ 2. $Select the correct option describing gonadotropin activity in a normal pregnant female :-$ (1) $High level of FSH and LH stimulates the thickening of endometrium.$ (2) $High level of FSH and LH facilitate implantation of the embryo.$ (3) $High level of hCG stimulates the synthesis of estrogen and progesterone.$ (4) $High level of hCG stimulates the thickening of endometrium$ 3. $Meiotic division of the secondary oocyte is completed :-$ (1) $At the time of fusion of a sperm with an ovum$ (2) $Prior to ovulation$ (3) $At the time of copulation$ (4) $After zygote formation$ 4. $Signals from fully developed foetus and placenta ultimately leads to a parturition which requires the release of$ (1) $Oestrogen from placenta$ (2) $Oxytocin from maternal pituitary$ (3) $Oxytocin from foetal pituitary$ (4) $Relaxin from placenta$ 5. $Seminal plasma in human males is rich in$ (1) $Fructose and calcium$ (2) $Glucose and calcium$ (3) $DNA and testosterone$ (4) $Ribose and potassium$ 6. $Which one of the following statements about human sperm is correct?$ (1) $Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization.$ (2) $The sperm lysins in the acrosome dissolves the egg envelope facilitating fertilization.$ (3) $Acrosome serves as a sensory structure leading the sperm towards the ovum.$ (4) $Acrosome serves no particular function.$ 7. $The signals for parturition originate from$ (1) $Placenta only$ (2) $Placenta as well as fully developed foetus$ (3) $Oxytocin released from maternal pituitary$ (4) $Fully developed foetus only$ 8. $Extrusion of second polar body from egg nucleus occurs :-$ (1) $after entry of sperm but before completion of fertilization$ (2) $after fertilization$ (3) $before entry of sperm into ovum$ (4) $simultaneously with first cleavage$ 9. $The main function of mammalian corpus luteum is to produce$ (1) $Oestrogen only$ (2) $Progesterone$ (3) $Human chorionic gonadotropin$ (4) $Relaxin only$ 10. $Which one of the following is not the function of placenta?$ (1) $Facilitates supply of oxygen and nutrients to embryo.$ (2) $Secretes oestrogen.$ (3) $Facilitates the removal of carbon dioxide and waste material from embryo.$ (4) $Secretes oxytocin during parturition$ 11. $Several hormones like hCG, hPL, estrogen, progesterone are produced by :-$ (1) $Fallopian tube$ (2) $Pituitary$ (3) $Ovary$ (4) $Placenta$ 12. $Which of the following depicts the correct pathway of transport of sperms?$ (1) $Rete testis \to Vas deferens \to Efferent ductules \to Epididymis$ (2) $Efferent ductules \to Rete testis \to Vas deferens \to Epididymis$ (3) $Rete testis \to Efferent ductules \to Epididymis \to Vas deferens$ (4) $Rete testis \to Epididymis \to Efferent ductules \to Vas deferens$ 13. $The main function of mammalian corpus luteum is to produce : -$ (1) $estrogen only$ (2) $progesterone$ (3) $human chorionic gonadotropin$ (4) $relaxin only$ 14. $Which of the following secretes the hormone, relaxin during the later phase of pregnancy?$ (1) $Corpus luteum$ (2) $Foetus$ (3) $Uterus$ (4) $Graafian follicle$ 15. $In humans, at the end of the first meiotic divison, the male germ cells differentiate into the :-$ (1) $Spermatids$ (2) $Spermatozonia$ (3) $Primary spermatocytes$ (4) $Secondary spermatocytes$ 16. $Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?$ (1) $Low concentration of FSH$ (2) $High concentration of Estrogen$ (3) $High concentration of Progesterone$ (4) $Low concentration of LH$ 17. $Which one of the following is the correct matching of the events occuring during menstrual cycle?$ (1) $Menstruation : Breakdown of myometrium and ovum not fertilised$ (2) $Ovulation : LH and FSH attain peak level and sharp fall in the secretion of progesterone.$ (3) $Proliferative : Rapid regeneration of phase myometrium and maturation of Graafian follicle.$ (4) $Development of: Secretory phase and corpus luteum increased secretion of progesterone.$ 18. $Which of these is not an important component of initiation of parturition in humans?$ (1) $Increase in oestrogen and progesterone ratio$ (2) $Synthesis of prostaglandins$ (3) $Release of oxytocin$ (4) $Release of prolactin$ 19. $A temporary endocrine gland in the human body is:-$ (1) $Corpus cardiacum$ (2) $corpus luteum$ (3) $Corpus allatum$ (4) $Pineal gland$ 20. $The difference between spermiogenesis and spermiation is :-$ (1) $In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.$ (2) $In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.$ (3) $In spermiogenesis spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.$ (4) $In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules.$ 21. $At which stage of life the oogenesis process is initiated?$ (1) $Adult$ (2) $Puberty$ (3) $Embryonic development stage$ (4) $Birth$ 22. $Signals for parturition originate from :-$ (1) $Placenta only$ (2) $Fully developed foetus only$ (3) $both placenta as well as fully developed foetus$ (4) $Oxytocin released from maternal pituitary$ 23. $Fertilization in humans is practically feasible only if:-$ (1) $the sperms are transported into vagina just after the release of ovum in fallopian tube$ (2) $the ovum and sperms are transported simultaneously to ampullary isthmic junction of the fallopian tube$ (3) $the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix$ (4) $the sperms are transported into cervix within 48 hrs of release of ovum in uterus$ 24. $In the human female, menstruation can be deferred by the administration of :-$ (1) $FSH only$ (2) $LH only$ (3) $Combination of FSH and LH$ (4) $Combination of estrogen and progesterone$ 25. $Sertoli cells are regulated by the pituitary hormone known as :-$ (1) $FSH$ (2) $GH$ (3) $Prolactin$ (4) $LH$ 26. $Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?$ (1) $Yolk sac$ (2) $Amnion$ (3) $Chorion$ (4) $Allantois$ 27. $Menstrual flow occurs due to the lack of$ (1) $Progesterone$ (2) $FSH$ (3) $Oxytocin$ (4) $Vasopressin$ 28. $How many secondary spermatocytes are required to form 400 million spermatozoa?$ (1) $50 million$ (2) $100 million$ (3) $200 million$ (4) $400 million$ 29. $What is the correct sequence of sperm formation?$ (1) $Spermatid, spermatocyte, spermatogonia, spermatozoa$ (2) $Spermatogonia, spermatocyte, spermatozoa$ (3) $Spermatogonia, spermatozoa, spematocyte$ (4) $Spermatogonia, spermatocyte, spermatid, spermatozoa$ 30. $The shared terminal duct of the reproductive and urinary system in the human male is$ (1) $Urethra$ (2) $Ureter$ (3) $Vas deferens$ (4) $Vasa efferentia$