CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 3 - MCQExams.com

If the .......... in the male is blocked, sperms can be prevented to .......... the egg.
  • Vas deferens, fertilize
  • Epididymis, synthesise
  • Seminiferous tubule, fertilize
  • Scrotam, synthesise
Cowper's glands are found in
  • Male mammals
  • Female mammals
  • Male amphibians
  • Female amphibians
Onset of menstruation is termed as 
  • Menopause
  • Menarche
  • Fertilization
  • None of the above
Seminiferous tubules are composed of
  • Spermatogonia
  • Glandular epithelium
  • Sensory epithelium
  • Germinal epithelium
Ovulation in mammals is caused by
  • FSH and TSH
  • FSH and LH
  • FSH and LTH
  • LTH and LH
Which one of the following statements about human sperm is incorrect?
  • Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization.
  • The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
  • Acrosome serves as a sensory structure leading the sperm towards the ovum
  • Acrosome serves no particular function.
Which of the following statements is incorrect?
  • Ovaries secrete female sex hormones, Estrogen.
  • Uterus is the site of foetal growth during pregnancy.
  • Oviduct is involved in conduction of ovum towards Uterus.
  • Epididymis is involved in storage, nutrition and maturation of ova.
Animals who give birth to young ones are:
  • Oviparous
  • Viviparous
  • Ovoviviparous
  • All of the above
The vas deferens connects the epididymis to the
  • Seminal vesicles
  • Urethra
  • Testes
  • Prostate gland
Which one of the following statements with regard to embryonic development in humans is correct?
  • Cleavage division bring about considerable increase in the mass of protoplasm.
  • In the second cleavage division, one of the two blastomeres usually divides a little sooner than the second.
  • With more cleavage division, the resultant blastomeres become larger and larger.
  • Cleavage division results in a hollow ball of cells called morula.
Which part of the ovary in mammals acts as an endocrine gland after ovulation?
  • Vitelline membrane
  • Graffian follicles
  • Stroma
  • Germinal epithelium
Which of the following is a function of seminal vesicle and prostate glands?
  • Production of plasma of semen, protection and nourishment of sperm
  • Production of sperm, protection and nourishment of sperm
  • Production of ovum, protection and nourishment of sperm
  • None of the above
Cowper's gland secrete a substance to
  • Nourish sperms
  • Neutralize acidity
  • Lubricate female's vagina to facilitate copulation
  • Both B and C
At menopause, which of the following is excreted along with urine?
  • FSH
  • MSH
  • ACTH
  • ADH
After moving through the vas deferens, sperms empties into the
  • Seminal vesicles
  • Urethra
  • Urinary bladder
  • All the above
During the ovulatory phase, the structure called as corpus luteum is formed from
  • Ruptured Graafian follicle
  • Epididymis
  • Isogametes
  • Endometrium
Proliferative phase of menstrual cycle lasts for .......... days.
  • 5
  • 8
  • 10
  • 12
The number of sperms produced from 24 secondary spermatocytes will be ?
  • 24
  • 48
  • 12
  • 96
The sperm becomes mature and fully motile in
  • Rete testis
  • Cauda epididymis
  • Vasa deferentia
  • Seminal vesicle
Menarche is the stage when
  • The first menstrual cycle starts.
  • The first delivery occurs.
  • The first ejaculation occurs.
  • The first month of menopause starts.
The period when menstrual cycle stops is 
  • Menarche
  • Luteal phase
  • Menopause
  • Heat period
The phase of menstrual cycle in humans, that lasts for 3 - 5 days is 
  • Follicular phase
  • Ovulatory phase
  • Luteal phase
  • Menstruation
The term 'spermatozoon' was coined by
  • Von Baer
  • Leeuwenhoek
  • Spemann
  • Swammerdam
The fluid which is rich in calcium citrate, fibrinolysin, acid phosphatase and contributes about 30% of the total volume of semen is released by
  • Cowper's glands
  • Prostate gland
  • Seminal vesicles
  • Epididymis
Sustentacular cells is another name of 
  • Leydig cells
  • Oocytes
  • Sertoli cells
  • Oogonia
Which of the following structures contribute to secretion of semen?
215895_e1376542a6394dd6b154e05ade999607.png
  • A
  • B
  • C, G and F
  • None of the above
Which one of the following statements is incorrect regarding the viability of mammalian sperm?
  • Viability of sperm is determined by its motility.
  • Sperms must be concentrated in a thick suspension.
  • Sperm is viable for only up to 24 hours.
  • Survival of sperm depends on the pH of the medium and is more active in alkaline medium.
Which of the labelled part is involved in storage of sperms?
215894.png
  • D
  • A
  • B
  • C
The Leydig cells as found in the human body are the secretory source of
  • FSH
  • Androgen
  • Progesterone
  • Intestinal mucus
Identify the parts where meiosis occurs.
215893_fd631458bfb348a89197979c9d512dd0.png
  • A
  • B
  • C
  • D
Which of the following part of spermatozoan arises from centriole?
  • Apical cap
  • Head
  • Middle piece
  • Tail
Which one of the following is not a part of male penis?
  • Corpora cavernosa
  • Glans
  • Urethra
  • Seminiferous tubule
Vasa efferetia are the ductules leading from
  • Epididymis to urethra
  • Testicular lobules to rete testis
  • Rete testis to vas deferens
  • Vas deferens to epididymis
Which of the following is much in number in an ovary?
  • Primary follicle
  • Corpus luteum
  • Graafian follicle
  • Maturing follicle
Menstrual cycle is affected by 
  • Progesterone only
  • LH only
  • LH, FSH and estrogen
  • Estrogen
The sperm produces substance of enzymatic nature of sperm lysine. In mammals, it is called
  • Hyaluronidase
  • Hyaluronic acid
  • Androgamone
  • Gyanogamone
Which piece of a sperm is called power house?
  • Head piece
  • Neck piece
  • Middle piece
  • Tail piece
The concept that organizer is essential for embryonic development was given by
  • J. Axelrod
  • K. Landsteiner
  • H. Spemann
  • I. P. Pavlov
Release of mature spermatozoa from the Sertoli cells is called
  • Spermiation
  • Semination
  • Insemination
  • None of the above
Proximal centriole is located in which part of the sperm?
  • Tail
  • Acrosome
  • Middle part
  • In a depression of nucleus
Space between acrosome and nucleus is called as
  • Nebenkern
  • Perforatorium
  • Nucleus of Pander
  • Perivitelline space
How many ova and sperm will be formed from 50 secondary oocytes and 50 secondary spermatocytes in frog?
  • 50 ova and 200 sperms
  • 50 ova and 100 sperms
  • 100 ova and 200 sperms
  • 100 ova and 400 sperms
How many secondary spermatocytes will form 400 spermatozoa?
  • 100
  • 400
  • 40
  • 200
Haploid number of chromosomes are found in
  • Zygote
  • Amoeba
  • Queen honeybee
  • Ovum
During spermatogenesis, how many spermatozoa are formed from a single primary spermatocyte?
  • 1
  • 2
  • 4
  • 8
Which of the following is diploid?
  • Secondary spermatocytes
  • Spermatozoa and ova
  • Spermatogonia, oogonia, primary spermatocyte
  • Secondary oocytes
Non-flagellated sperm are found in
  • Sea urchin
  • Astacus
  • Ascaris
  • Both B and C
During which stage of gametogenesis meiosis occurs?
  • Growth phase
  • Multiplication phase
  • Maturation phase
  • None of the above
In which of the following animals, the sperm can survive for a longer period in the body of female?
  • Mammals
  • Aves
  • Reptiles
  • Amphibia
"Father of embryology" is
  • Spemann
  • Bonnet
  • Von Baer
  • None of the above
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