CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 10 - MCQExams.com

Choose the correct answers from the alternatives given.
Development cannot proceed properly unless each stage is successfully completed before the next begins, starting with
  • gamete formation
  • gastrulation
  • fertilization
  • cleavage
Which of the following is an unpaired gland in human body?
  • Prostate gland
  • Seminal vesicle
  • Cowpers gland
  • Bartholins gland
Choose the correct answers from the alternatives given.
Which of the following stages is the first one out of sequence?
  • Cleavage
  • Blastula
  • Morula
  • Gastrula
Choose the correct answers from the alternatives given.
In many embryos, differentiation begins at the following stage
  • Cleavage
  • Blastula
  • Gastrula
  • Neurula
Refer to the given graph showing levels of different hormones (P-S) during menstrual cycle in a normal woman
Identify the hormones P-S and select the incorrect statement regarding them
872707_ee9fa7557f884178aa67477c659e305a.png
  • $$R$$ stimulates the ovarian follicles to produce estrogen during proliferative phase while $$Q$$ stimulates the corpus luteum of the ovary to secrete progestrone
  • Menstrual phase is caused by the reduction of $$P$$ and $$S$$
  • Proliferative phase is characterised by increased production of $$S$$ whereas secretory phase is characterised by increased production of $$P$$
  • In males, $$Q$$ causes spermatogenesis whereas $$R$$ stimulates Leydig's cells to secrete testosterone
Match the items given in column I  with those in column II and select the correct option given below:
Column IColumn II 
a.Proliferative phase 1.Breakdown of endometrial lining
b.Secretory phase2.Follicular phase
c.Menstruation 3.Luteal phase
  • A-2, B-3, C-1
  • A-3, B-2, C-1
  • A-3, B-1, C-2
  • A-1, B-3, C-2
Which of the following statements is not correct regarding oviparous animals?
  • Females lay fertilized/unfertilized eggs at a safe place.
  • Development of zygote takes place outside the female's body.
  • Examples of oviparous animals are all birds, most reptiles and egg-laying mammals.
  • None of these
Which of the following situations correctly describes the similarity between an angiosperm egg and a human egg?
(i) Eggs of both are formed only once in a lifetime.
(ii) Both the angiosperm egg and human egg are stationary.
(iii) Both the angiosperm egg and human egg are motile transported.
(iv) Syngamy in both results in the formation of zygote.

Choose the correct answer from the options given below.
  • (ii) and (iv)
  • (iv) only
  • (iii) and (iv)
  • (i) and (iv)
Which of the following animals show menstrual cycle?
  • Gorillas and chimpanzees
  • Monkeys and humans
  • Orangutans and monkeys
  • All of these
In most mammals, the testes are located in scrotal sac for _________.
  • More space to visceral organs
  • Spermatogenesis
  • Sex differentiation
  • Independent functioning of kidney
Sertoli cells are regulated by the pituitary hormone known as __________.
  • LH
  • FSH
  • GH
  • Prolactin
A sex gland which contributes fluid containing fructose that provides spermatozoa energy for swimming and hormone prostaglandins that stimulate actions in the female reproductive tract to aid sperm-ovum interaction is
  • Cowper's gland
  • Prostate gland
  • Seminal vesicle
  • Preputial gland
In humans, at the end of the fist meiotic division, the male germ cells differentiate into the _______________.
  • Spermatids
  • Spermatogonia
  • Primary spermatocyon
  • Secondary spermatocytes
The function of the secretion of prostate gland is to _____________.
  • Inhibit sperm activity
  • Attract sperms
  • Stimulate sperm avidity
  • None of these
The given figure is of human female reproductive system. Identity the parts labelled as A, B, C and D and select the select option.
927768_5a09b9c4c1ea47d19def43174fdcf330.JPG
  • A-Oviduct, B-Utems, C-Ovarian ligament, D-Ovary
  • A-Cervix, B-Uterus, C-Ovary, D-Tumour
  • A-Utems, B-Uterine cavity, C-Oviductal funnel, D-Ovary
  • A-Cervix, B-Uterine cavity, C-Fallopian tube, D-Ovary
The given figure depicts a diagrammatic sectional view of the human female reproductive system. Which set of three parts out of I-VI have been correctly identified?
927773_16c20e1cb35a4b068a220f200305b829.png
  • (II) Endometrium, (III) Infundibulum, (IV) Fimbriae
  • (III) Infundibulum, (IV) Fimbriae, (V) Cervix
  • (IV) Oviducal funnel, (V) Uterus, (V) Cervix
  • (I) Perimetrium, (II) Myometrium, (III) Fallopian tube
In spermatogenesis the phase of maturation involves
  • the growth of spermatogonia into primary spermatocyte
  • the formation of spermatogonia from gonocytes through mitosis
  • the formation of spermatids from primary spermatocytes through meiosis
  • the formation of oogonia from the spermatocytes through meiosis.
Prostate glands are located below
  • gubernaculum
  • seminal vesicles
  • epididymis
  • bulbourethral glands.
The term "inbreeding depression" is related to ______________.
  • increased fertility and productivity
  • increased milk production
  • reduced fertility and productivity
  • reduced milk production.
The female external genitalia include
(i) Ovary
(ii) Mammary gland
(iii) Mons pubis
(iv) Clitoris
(v) Labia majora
  • (i) and (ii)
  • (ii) and (iii)
  • (iii), (iv) and (v)
  • (ii), (iii) and (v)
The following graph shows the levels of pituitary hormones during a menstrual cycle. What do 1 and 2 represent?
927918_d6942a81b5034514958aad3891d55885.png
  • 1- LH , 2- FSH
  • 1- Estrogen , 2- Progesterone
  • 1- FSH , 2- LH
  • 1- Progesterone , 2- Estrogen
Identify the parts labelled as A, B, C, and E in the given diagram of a human sperm and select the correct option.
927871_37edb559c401461b8e6c2e48145c9b61.JPG
  • A-Nucleus, B-Tail, C-Mitochondria, D-Acrosome, E-Centriole
  • A-Acrosome, B-Nucleus, C-Centriole, D-Mitochondria, E-Plasma membrane
  • A-Nudeus, B-Mitochondria, C-Plasma membrane, D-Centriole, E-Neck
  • A-Acrosome, B-Centriole, C-Mitochondria, D-Plasma membrane, E-Tail
Spermatogenesis is induced by ____________.
  • FSH
  • ICSH
  • STH
  • ATH
Match column I with column II and select the correct option from the codes given below.
Column IColumn II
A.Acrosome(i)Rudimentary erectile tissue
B.Endometrium(ii)Uterus
C.Polar body(iii)Oogenesis
D.Clitoris(iv)Spermatozoan
  • A - (ii), B - (i), C - (iv), D - (iii)
  • A - (vi), B - (ii), C - (iii), D - (i)
  • A - (iv), B - (iii), C - (ii), D - (i)
  • A - (iv), B - (iii), C - (i), D - (ii)
The following graph shows the levels of ovarian hormones during a menstrual cycle. What do 1 and 2 represent?
927919_8013b431849e4edbbfb2c797fca0f47b.png
  • 1- Progesterone, 2- Estrogen
  • 1- FSH, 2- LH
  • 1- LH, 2- FSH
  • 1- Estrogen, 2- Progesterone
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
  • Spermatogonia $$\rightarrow$$ spermatocyte $$\rightarrow$$ spermatid $$\rightarrow$$ sperms
  • Spermatid $$\rightarrow$$ spermatocyte $$\rightarrow$$ spermatogonia $$\rightarrow$$ sperms
  • Spermatogonia $$\rightarrow$$ spermatid $$\rightarrow$$ spermatocyte $$\rightarrow$$ sperms
  • Spermatocyte $$\rightarrow$$ spermatogonia $$\rightarrow$$ spermatid $$\rightarrow$$ sperms
The sperms undergo physiological maturation, acquiring increased motility and fertilising capacity in _____________.
  • Seminiferous tubules
  • Vasa efferentia
  • Epididymis
  • Vagina
Which of the following groups of cells in the male gonad, represent haploid cells?
  • Spermatogonial cells
  • Germinal epithelial cells
  • Secondary spermatocytes
  • Primary spermatocytes
A cross section at the midpoint of the middle piece of a human sperm will show ______________________.
  • Centriole, mitochondria and 9 + 2 arrangement of microtubules
  • Centriole and mitochondria
  • Mitochondria and 9 + 2 arrangement of microtubules
  • 9 +2 Arrangement of microtubules only.
In spermatogenesis, reduction division of chromosome occurs during conversion of ____________________.
  • Spermatogonia to primary spermatocytes
  • Primary spermatocytes to secondary spermatocytes
  • Secondary spermatocytes to spermatids
  • Spermatids to Sperms
Immediately after ovulation, the mammalian egg is covered by a membrane known as ______________.
  • Chorion
  • Zona pellucida
  • Corona radiata
  • Vitelline membrane
The phase of menstrual cycle in humans that last for 7-8 days, is ____.
  • Follicular phase
  • Ovulation phase
  • Luteal phase
  • Menstruation
A human female reaches menopause around the age of
  • 50 years
  • 17 years
  • 70 years
  • 25 years.
For human female which of the following is incorrect?
  • Menstrual cycle takes 28 days on an average
  • Menopause occur at 45-55 years of age
  • The eggs released during pregnancy die
  • Menstruation takes 4 days on an average
Cessation of menstrual cycle in a woman is called ___________.
  • Lactation
  • Ovulation
  • Menopause
  • Parturition
Some important events that occur during the menstrual cycle are given below. Arrange the events in a proper sequence and select the correct option.
(i) Proliferation of endometrial wall
(ii) LH surge
(iii) Secretion of estrogen
(iv) Secretion of progesterone
(v) Ovulation
(vi) Growth of corpus luteum
(vi) Degeneration of corpus luteum
(vii) Menstruation
  • (ii) $$\rightarrow$$ (iv) $$\rightarrow$$ (iii) $$\rightarrow$$ (i) $$\rightarrow$$ (vii) $$\rightarrow$$ (v) $$\rightarrow$$ (viii) $$\rightarrow$$ (vi)
  • (iii) $$\rightarrow$$ (i) $$\rightarrow$$ (ii) $$\rightarrow$$ (v) $$\rightarrow$$ (vi) $$\rightarrow$$ (iv) $$\rightarrow$$ (vii) $$\rightarrow$$ (viii)
  • (v) $$\rightarrow$$ (i) $$\rightarrow$$ (vi) $$\rightarrow$$ (viii) $$\rightarrow$$ (iii) $$\rightarrow$$ (iv) $$\rightarrow$$ (vii) $$\rightarrow$$ (ii)
  • (ii) $$\rightarrow$$ (v) $$\rightarrow$$ (vi) $$\rightarrow$$ (i) $$\rightarrow$$ (viii) $$\rightarrow$$ (vii) $$\rightarrow$$ (iii) $$\rightarrow$$ (iv)
The accompanying diagram shows the changes that take place in the endometrium during a normal menstrual cycle. Identify the changes and select the correct option.
927920_a7432a3f690241a08d3d55cd0e1243f0.png
  • Ovulation- A , Menstruation- B
  • Ovulation- A , Menstruation- C
  • Ovulation- C , Menstruation- A
  • Ovulation- B , Menstruation- D
At menopause there is rise in urinary excretion of ____________.
  • FSH
  • STH
  • MSH
  • None of these
Repair of endometrium is undertaken by _________.
  • LH
  • FSH
  • Estrogen
  • Prolactin
Which of the following statements concerning menopause is correct?
  • Menopause occurs because all of the female's follicles become hormone-producing corpus luteum at once
  • Menopausal symptoms are a result of decrease in the production of FSH and LH
  • The onset of menopause is primarily due to follicle atresia
  • All of these
Identify the correctly matched pair/pairs of the germ layers and their derivatives.

A. Ectoderm - Epidermis
B. Endoderm - Dermis
C. Mesoderm - Muscles
D. Mesoderm - Notochord
E. Endoderm - Enamel of teeth
  • A and D
  • A and B
  • A, C and D
  • A, B, C and E
The structures derived from ectoderm are:-

(i) Pituitary gland
(ii) Cornea
(iii) Kidneys
(iv) Notochord
  • (i) and (iii)
  • (ii) and (iii)
  • (i) and (ii)
  • (ii) and (iv)
Gastrula is the embryonic stage in which _____________.
  • Cleavage occurs
  • Blastocoel form
  • Germinal layers form
  • Villi form
Spermiation is the process of the release of sperms from
  • seminiferous tubules
  • vas deferens
  • epididymis
  • prostate gland.
Implantation takes place after __________ of fertilisation.
  • 5 days
  • 6 days
  • 7 days
  • 8 days
During the development of embryo, which of the following occurs first?
  • Differentiation of organ
  • Differentiation of tissue
  • Differentiation of organ system
  • Differentiation of cells
Preparation of sperm before penetration of ovum is_______________.
  • Spermiation
  • Cortical reaction
  • Spermiogenesis
  • Capacitation
In the development of the human body, the ectoderm is responsible for the formation of __________.
  • Lens of the eye
  • Nervous system
  • Sweat glands
  • All of these
Acrosomal reaction of the sperm occurs due to
  • its contact with zone pellucida of the ova
  • reactions within the uterine environment of the female
  • reactions within the epididymal environment of the male
  • androgens produced in the uterus.
The early stage human embryo distinctly possesses -
  • Gill
  • Gill slits
  • External ear (pinna)
  • Eyebrows
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