Human Reproduction MCQs with Answers

Question-1. Choose the incorrect statement from the following:

1. In the human female implantation occurs almost seven days after fertilisation
2. Colostrum contains antibodies and nutrients
3. In birds and mammals internal fertilisation takes place
4. Polyspermy is prevented by the chemical changes in the egg surface

Question-2. Cleavage in mammalian egg is

1. unequal holoblastic
2. superficial meroblastic
3. discoidal meroblastic
4. equal holoblastic

Question-3. Cleavage starts after fertilization in

1. Uterus
2. Vestibule
3. Clitoris
4. Fallopian tube

Question-4. Connective tissue around seminiferous tubules possess endocrine cells called

1. Sertoli cells
2. Primary germ cells
3. None of these
4. Leydig cells

Question-5. Conversion of spermatids into sperms is

1. Ppermatogenesis
2. Gametogenesis
3. Metamorphosis
4. Spermiogenesis

Question-6. Corona radia is made up of

1. stratum functionalis
2. zona pellucid around the oocyte
3. All of these
4. follicular cells around the oocyte

Question-7. Corpus leteum develops from

1. none of the these
2. Nephrostome
3. Oocyte
4. Graafian follicle

Question-8. Corpus luteum

1. None of these
2. Decreases in size during pregnancy
3. Degenerates during pregnancy
4. Later forms corpus albicans

Question-9. Corpus luteum develops under the influence of

1. FSH
2. Estrogen
3. All of these
4. LH

Question-10. Corpus luteum produces

1. Testosterone
2. Estrogen
3. All of these
4. Progesterone

Question-11. Correct sequence of hormone secretion from beginning of menstruation is

1. Estrogen, progesterone, FSH
2. FSH, progesterone, estrogen
3. All of these
4. FSH, estrogen progesterone

Question-12. Cryptorchidism is a condition where

1. One of both testes are not developed
2. One of both testes are not developed
3. None of these
4. One or both testes fail to descend into the scrotum

Question-13. During cleavage, what is true about cells?

1. Size does not increase
2. There is less consumption of oxygen
3. The division is like meiosis
4. Nucleocytoplasmic ratio remains unchanged

Question-14. During embryonic development, the establishment of polarity along anterior/ posterior, dorsal/ventral or medial/lateral axis is called

1. pattern formation
2. organizer phenomena
3. axis formation
4. anamorphosis

Question-15. Ejaculation of human male contains about 200 – 300 million sperms, of which for normal fertility ____ % sperms must have normal shape and size and at least ____% must show energetic motility.

1. 50, 50
2. 60, 40
3. 30, 70
4. 40, 60

Question-16. ells of Leydig occur in

1. Ovary
2. Liver
3. Spleen
4. Testis

Question-17. Extra-embryonic membranes of the mammalian embryo are derived from

1. trophoblast
2. formative cells
3. follicle cells
4. inner cell mass

Question-18. Extrusion of second polar body from egg nucleus occurs

1. after completion of fertilization
2. before entry of sperm
3. without any relation of sperm entry
4. after entry of sperm but before completion of fertilization

Question-19. Eye lens is formed from

1. mesoderm
2. endoderm
3. both a) and b)
4. ectoderm

Question-20. Fertilizins are emitted by

1. mature eggs
2. sperms
3. polar bodies
4. immature eggs

Question-21. Foetal ejection reflex in human female is induced by:

1. differentiation of mammary glands
2. pressure exerted by amniotic fluid
3. release of oxytocin from pituitary
4. fully developed foetus and placenta

Question-22. Freshly released human egg has

1. one X - chromosome
2. two X - chromosomes
3. Both a) and b)
4. one Y - chromosome

Question-23. Gray crescent is the area

1. just opposite to the site of entry of sperm into ovum
2. at the animal pole
3. at the vegetal pole
4. at the point of entry of sperm into ovum

Question-24. How does human sperm locomote?

1. Cilia
2. Neutrophils
3. None of these
4. Flagella

Question-25. How many autosomes does a human primary spermatocyte have?

1. 34
2. 24
3. 14
4. 44

Question-26. How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte

1. Four, Four
2. One, One
3. None of these
4. Four, One

Question-27. Human eggs are

1. microlecithal
2. mesolecithal
3. macrolecithal
4. alecithal

Question-28. Identify the odd one from the following

1. Fimbriae
2. Infundibulum
3. Isthmus
4. Labia minora

Question-29. Identify the wrong statement from the following

1. High levels of estrogen triggers the ovulatory surge.
2. Sperms released from seminiferous tubules are poorly motile / non-motile.
3. Progesterone level is high during the post ovulatory phase of menstrual cycle
4. Orgonial cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards

Question-30. If mammalian ovum fails to get fertilized, which one of the following is unlikely ?

1. Estrogen secretion further decreases
2. Primary follicle starts developing
3. Progesterone secretion rapidly declines
4. Corpus luteum will disintegrate

Question-31. Immediately after ovulation, the mammalian egg is covered by a membrane known as

1. Corona radiata
2. Chorion
3. All of these
4. Zona pellucida

Question-32. In 28 days human ovarian cycle, ovulation occurs on

1. 5 day
2. 14 day
3. 28 day
4. l day

Question-33. In human female the blastocyst

1. gets nutrition from uterine endometrial secretion only after implantation
2. gets implanted in endometrium by the trophoblast cells.
3. forms placenta even before implantation
4. gets implanted into uterus 3 days after ovulation

Question-34. In humans, male germs cells differentiate into _____ at the end of first meiotic division.

1. spermatogonium
2. secondary spermatocyte
3. primary spermatocyte
4. spermatid

Question-35. In telolecithal egg the yolk is found

1. on one side
2. both the sides
3. at centre
4. all over the egg

Question-36. In the human female, menstruation can be deferred by the administration of

1. combination of FSH and LH
2. combination of estrogen and progesterone
3. FSH only
4. LH only

Question-37. In the process of spermatogenesis, first maturation division is called _______.

1. reduction division
2. amitotic division
3. None of the these
4. mitotic division

Question-38. It The cell division in secondary oocyte is suspended at

1. Prophase II
2. Prophase II
3. None of these
4. Metaphase II

Question-39. Level of which hormones are at their highest during the luteal phase (second half of the cycle) of the menstrual cycle?

1. Progesterone
2. Luteinizing hormone
3. Follicular stimulating hormone
4. Estrogen

Question-40. Location and secretion of Leydig’s cells are

1. ovary — estrogen
2. testis — testosterone
3. pancreas — glucagon
4. liver — cholesterol

Question-41. Mainly which type of hormones control the menstrual cycle in human beings ?

1. LH
2. FSH, LH, estrogen
3. Progesterone
4. FSH

Question-42. Male hormone is produced in the testis by cells of

1. epithelial
2. spermatocytes
3. Leydig
4. sertoli

Question-43. Mature Graafian follicle is generally present in the ovary of a healthy human female around stet:

1. 18 – 23 day of menstrual cycle
2. 24 – 28 day of menstrual cycle
3. 5 – 8 day of menstrual cycle
4. 11 – 17 day of menstrual cycle

Question-44. Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.

1. Follicle stimulating hormone
2. Progesterone
3. Estrogen
4. Luteinizing hormone

Question-45. Meroblastic cleavage is division

1. partial/parietal
2. total
3. spiral
4. horizontal

Question-46. Middle piece of mammalian sperm possesses

1. mitochondria only
2. centriole only
3. nucleus and mitochondria
4. mitochondria and centriole

Question-47. Morula is a developmental stage

1. Between the blastocyst and gastrula
2. After the implantation
3. Between implantation and parturition
4. Between the zygote and blastocyst

Question-48. Occurrence of Leydig’s cells and their secretion is

1. liver and cholesterol
2. pancreas and glucagon
3. testis and testosterone
4. ovary and estrogen

Question-49. Ovulation in the human female normally takes place during the menstrual cycle

1. just before the end of the secretory phase
2. at the beginning of the proliferative phase
3. at the end of the proliferative phase
4. at the mid secretory phase

Question-50. Ovulation occurs under the influence of

1. FSH
2. estrogen
3. progesterone
4. LH

Question-51. Ovulation occurs under the influence of

1. follicle-stimulating hormone
2. progesterone
3. None of these
4. Ovulation occurs under the influence of

Question-52. Proliferative phase of menstrual cycle, is also called

1. luteal phase
2. luteal phase
3. All of these
4. luteal phase

Question-53. Secretion of progesterone by corpus luteum is initiated by

1. LH
2. MSH
3. testosterone
4. thyroxine

Question-54. Secretions from which one of the following are rich in fructose, calcium and some enzymes ?

1. Pancreas
2. Salivary glands
3. Male accessory glands
4. Liver

Question-55. Semen is a constituent of seminal plasma with _______.

1. sperm
2. zygote
3. follicle
4. ovum

Question-56. Seminal plasma in human males is rich in

1. glucose and calcium
2. DNA and testosterone
3. ribose and potassium
4. fructose and calcium

Question-57. Seminal plasma in humans is rich in

1. fructose and certain enzymes but poor in calcium
2. fructose, calcium and certain enzymes
3. fructose and calcium but has no enzymes
4. glucose and certain enzymes but has no calcium

Question-58. Seminal plasma, the fluid part of semen is formed by

1. prostate and seminal vesicle
2. Both
3. None of these
4. seminal vesicles, prostate and bulbourethral gland.

Question-59. Seminal plasma, the fluid part of semen, is contributed by.i. Seminal vesicleii. Prostateiii. Urethraiv. Bulbourethral gland

1. ii, iii and iv
2. i and iv
3. i and ii
4. i, ii and iv

Question-60. Sertoli cells are found in

1. adrenal cortex and secrete adrenaline
2. seminiferous tubules and provide, nutrition to germ cells
3. pancreas and secrete cholecystokinin
4. ovaries and secrete progesterone

Question-61. Sertoli cells are regulated by the pituitary hormone known as

1. GH
2. prolactin
3. LH
4. FSH

Question-62. Spermiation is the process of the release of sperms from

1. Vas deferens
2. Epididymis
3. Prostate gland
4. Seminiferous tubules

Question-63. Spot the odd one out from the following structures with reference to the male reproductive system

1. Vasa efferentia
2. Ret testis
3. Epididymis
4. Isthmus

Question-64. Stratum germinativum is an example of which kind of epithelium ?

1. Ciliated
2. Columnar
3. Squamous
4. Cuboidal

Question-65. Termination of gastrulation is indicated by

1. obliteration of archenteron
2. closure of blastopore
3. closure of neural tube
4. obliteration of blastocoel

Question-66. Test-tube baby means a baby born when

1. it develops from a non-fertilized egg
2. it is developed in a test tube
3. it is developed through tissue culture method
4. the ovum is fertilized externally and there after implanted in the uterus

Question-67. The __________ lead to vas deferens that ascends to the ______ and loops over the __________.

1. epididymis, abdomen, urinary bladder.
2. vas efferentia, abdomen, ureter.
3. urinary bladder, ejaculatory duct, abdomen.
4. prostate, stomach, urinary bladder.

Question-68. The cell which undergoes meiosis I during spermatogenesis, is the

1. secondary spermatocyte
2. spermatid
3. spermatogonium
4. primary spermatocyte

Question-69. The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:

1. spermatogonia-spermatid-spermatocytesperms
2. spermatocyte-spermatogonia-spermatid – sperms
3. spermatogonia – spermatocyte – spermatid – sperms
4. spermatid – spermatocyte –spermatogonia – sperms

Question-70. The enlarged end of penis is covered by a loose fold of skin is called.

1. foreskin
2. hymen
3. urethral meatus
4. glans penis

Question-71. The estrus cycle is a characteristic of

1. human females only
2. mammalian males other than primates
3. mammalian females other than primates
4. human males only

Question-72. The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

1. Fifth month
2. Sixth month
3. Third month
4. Fourth month

Question-73. The immature male germ cell undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.

1. Spermatozoa are transformed into spermatids
2. Primary spermatocytes divide by mitotic cell division
3. Spermatogonia have 46 chromosomes and always undergo meiotic cell division
4. Secondary spermatocytes have 23 chromosomes and undergo second meiotic division

Question-74. The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for

1. interaction with the environment and progressive evolution
2. reproduction
3. growth and movement
4. responsiveness to touch

Question-75. The mammalian corpus luteum produces

1. progesterone
2. luteotropic hormone
3. luteinizing hormone
4. estrogen

Question-76. The membranous cover of the ovum at ovulation is

1. Zona radiata
2. Zona pellucida
3. Chorion
4. Corona radiata

Question-77. The part of Fallopian tube closest to the ovary is

1. Infundibulum
2. Cervix
3. Ampulla
4. Isthmus

Question-78. The second maturation division of the mammalian ovum occurs

1. Until after the ovum has been penetrated by a sperm
2. Until the nucleus of the sperm has fused wilh that of the ovum
3. in the Graafian follicle following the first maturation division
4. Shortly after ovulation before the ovum makes entry into the Fallopian tube

Question-79. The signals for parturition originate from

1. Placenta as well as fully developed foetus
2. oxytocin released from maternal pituitary
3. fully developed foetus only
4. placenta only

Question-80. The vas deferens receives duct from the seminal vesicle and opens into urethra as:

1. Efferent ductule
2. Ureter
3. Epididymis
4. Ejaculatory duct

Question-81. There is no cell division involved in

1. embryogenesis
2. oogenesis
3. All of these
4. spermiogenesis

Question-82. Urethral meatus refers to the:

1. Muscles surrounding the urinogenial duct
2. Opening of vas deferens into urethra
3. Urinogenital duct
4. External opening of the urinogenital duct

Question-83. Vas deferens receives the duct of seminal vesicle and forms the

1. urethral meatus
2. urethra
3. epididymis
4. ejaculatory duct

Question-84. Vasa efferentia are the ductules leading from

1. vas deferens to epididymis.
2. rete testis to vas deferens.
3. testicular lobules to rete testis..
4. epididymis to urethra.

Question-85. Vasa efferentia are the ductules leading from

1. Rete testis to vas deferens
2. Vas deferens to epididymis
3. Epididymis to urethra
4. Testicular lobules to rete testis

Question-86. What is true about cleavage in fertilized egg of human?

1. Starts when egg reaches uterus
2. Starts in fallopian tube
3. It is identical to normal mitosis
4. Meroblastic

Question-87. What is true for cleavage ?

1. Size of cells decreases
2. Size of cells increases
3. Size of embryo decreases
4. Size of embryo increases

Question-88. When both ovaries are removed from rat which hormone is decreased in blood ?

1. Prolactin
2. Estrogen
3. Gonadotropic releasing factor
4. Oxytocin

Question-89. Where does the ovum receive the sperm?

1. Zona pellucid
2. Zona pellucid
3. None of these
4. Vegetal pole

Question-90. Which among the following has 23 chromosomes?

1. Oögonia
2. Zygote
3. Spermatogonia
4. Secondary oöcyte

Question-91. Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?

1. Allantois
2. Yolk sac
3. Amnion
4. Chorion

Question-92. Which of the following contains a fluid filled cavity called antrum?

1. Primary follicle of ovary.
2. Tertiary follicle of ovary.
3. Secondary spermatocyte.
4. Primary spermatocyte.

Question-93. Which of the following hormone maintains the function of male sex accessory gland and ducts?

1. Androgen
2. Progesterone
3. Luteinizing hormone
4. Estrogen

Question-94. Which of the following hormones is not secreted by human placenta?

1. Progesterone
2. Estrogens
3. hCG
4. LH

Question-95. Which of the following is a finger like structure and lies at the upper junction of the two labia minora above the urethral opening?

1. Oviduct
2. Ampulla
3. Chorionic villi
4. Clitoris

Question-96. Which one of the following is not a male accessory gland?

1. Prostate
2. Bulbourethral gland
3. None of these
4. Ampulla

Question-97. Which one of the following is the correct matching of the events occurring during menstrual cycle?

1. Menstruation: breakdown of myometrium and ovum not fertilized.
2. Ovulation : LH and FSH attain peak level and sharp fall in the secretion of progesterone.
3. Proliferative phase: Rapid regeneration of myometrium and maturation of Graafian follicle
4. Development of : Secretory phase and increased secretion of progesterone

Question-98. Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female ?

1. retention of well-developed corpus luteum
2. fertilisation of the ovum
3. maintenance of the hypertrophical endometrial lining.
4. maintenance of high concentration of sex-hormones in the blood stream

Question-99. Which one of the following statement is incorrect about menstruation?

1. The menstrual fluid can easily clot
2. At menopause in the female, there is especially abrupt increase in gonadotropic hormones
3. The beginning of the cycle of menstruation is called menarche
4. During normal menstruation about 40 mL blood is lost

Question-100. Which one of the following statements about human sperm is correct?

1. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
2. Acrosome serves as a sensory structure leading the sperm towards the ovum
3. Acrosome serves no particular function
4. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation

Question-101. Which part of ovary in mammals acts as an endocrine gland after ovulation ?

1. Stroma
2. Germinal epithelium
3. Vitelline membrane
4. Graafian follicle

Question-102. Which set is similar ?

1. Sebum — Sweat
2. Bundle of His — Pacemaker
3. Vit-B7 — Niacin
4. Corpus luteum — Graafian follicle

Question-103. Withdrawal of which of the following hormones is the immediate cause of menstruation ?

1. FSH
2. FSH-RH
3. Progesterone
4. Estrogen

Question-104. After ovulation, the ruptured Graafian follicle changes into

1. Corpus iuteum
2. Corpus albicans
3. Corpus callosum
4. Corpus striatum

Question-105. Endometrium is the lining of

1. Uterus
2. Fallopian
3. Ovary
4. Vagina

Question-106. Failure of testes to descend into the scotum is called

1. Cryptorchidism
2. Castration
3. Gynaecomastia
4. Paedogenesis

Question-107. Fusion of male and female gametes is called

1. Amphimixis
2. Ejaculation
3. Syngamy
4. Polygamy

Question-108. Mammalian follicle was first discovered by

1. Spallangani
2. Von Bear
3. Leeuwenhoek
4. De Graf

Question-109. Menopause in female comes at the age of

1. 45-55 years
2. 55 to 60 years
3. After 60 years
4. 30 to 40 years

Question-110. Nebenkern represents

1. Acrosome of sperm
2. Centiples of sperm
3. Tail of sperm
4. Mitochondrial spiral of sperm

Question-111. Source of testosterone hormone are

1. Acinal cells
2. Lutein cells
3. Leydig cells
4. Setoli cells

Question-112. Sperm entry in the ovum is assisted by

1. Hyaluronic acid
2. Fertilizin
3. Antifertilizin
4. Hyaluronidase

Question-113. The cavity present in the Graafian follicle is

1. Archenteron
2. Antrum
3. Ostium
4. Amniotic cavity

Question-114. The degenerative process by which eggs are lost from the ovary is called

1. Regression
2. Atresia
3. Hyperplasia
4. Hypoplasia

Question-115. The ovum released from the ovary is received by

1. Vagina
2. Isthmus
3. Ostium
4. Uterus

Question-116. The sperm forming tubules of testes are

1. Nephric tubules
2. Rete testis
3. Interstitial cells
4. Crypts

Question-117. The spermiogenesis is the process by which spermatozoa are formed from

1. Spermatid
2. Primary.spermatocyte.
3. Secondary spermatocyte
4. Spermatogonia

Question-118. Which of the following is not associated with the human male?

1. Perineal gland
2. CowperÂ’s glands
3. Seminal vesicles
4. Prostrate gland

Question-119. Cells become variable in morphology and function in different regions of the embryo. The process is

1. metamorphosis
2. organization
3. rearrangement
4. differentiation

Question-120. Egg is liberated from ovary in

1. primary oocyte stage
2. oogonial stage
3. mature ovum stage
4. secondary oocyte stage

Question-121. Gonads develop from embryonic

1. endoderm
2. mesoderm
3. Both b) and c)
4. ectoderm

Question-122. How many sperms are formed from a secondary spermatocyte?

1. 8
2. 2
3. 1
4. 4

Question-123. _______ is a lytic enzyme released by the sperm.

1. Helicase
2. Trypsin
3. None of the these
4. Hyaluronidase

Question-124. A change in the amount of yolk and its distribution in the egg will affect

1. Fertilization
2. Formation of zygote
3. Pattern of cleavage
4. Number of blastomeres produced

Question-125. A sac shaped like an upside down pear with a thick lining and muscles in the pelvic area where a fertilized egg or zygote comes to grow into a baby is called _______.

1. uterus
2. vagina
3. vulva
4. oviduct

Question-126. Acrosomal reaction of the sperm occurs due to

1. Reactions within the uterine environment of the female
2. Reactions within the epididymal environment of the male
3. Androgens produced in the uterus
4. Its contact with zona pellucida of the ova

Question-127. Acrosome reaction in sperm is triggered by

1. release of lysin
2. influx of Na+
3. release of fertilizin
4. capacitation

Question-128. After birth, colostrum is released from mammary glands which is rich in

1. proteins and low in fat
2. proteins, antibodies and low in fat
3. proteins, fat and low in antibodies
4. fat and low in proteins

Question-129. After ovulation, Graafian follicle regresses into

1. corpus callosum
2. corpus albicans
3. corpus atresia
4. corpus luteum

Question-130. Amount of yolk and its distribution are changed in the egg. Which one is affected?

1. Formation of zygote
2. Number of blastomeres
3. Fertilization
4. Pattern of cleavage

Question-131. At the end of first meiotic division, male germ differentiates into

1. primary spermatocyte
2. spermatogonium
3. spermatid
4. secondary spermatocyte

Question-132. At the time of organogenesis, genes regulate the process at different levels and at different time due to

1. regulator
2. intron
3. exon
4. promoter

Question-133. Bartholin’s glands are situated

1. on either side of vas deference in humans
2. on the sides of the head of some amphibians
3. at the reduced tail end of birds
4. on either side of vagina in humans

Question-134. Blastopore is

1. opening of gastrocoel
2. future anterior end of embryo
3. found in blastula
4. opening of neural tube

Question-135. By which process sperms released from the seminiferous tubules?

1. Insemination
2. Spermatogenesis
3. Spermiogenesis
4. Spermiation

Question-136. Cavity of graafian follicle is

1. Liquor folliculi
2. Discus proligerous
3. All of these
4. Antrum

Question-137. Cells of corona radiata remain grouped together by

1. Hyaluronidase
2. Lipids
3. Pectins
4. Hyaluronic acid