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NEET • BIOLOGY • HUMAN REPRODUCTION
Human reproduction practice · Mixed difficulty
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121
Medium
121 of 247
Understanding
+4 | -1
Which of the following groups of cell in the male gonad, represent haploid cells?
View answer and explanation
Correct option: C
Secondary spermatocytes
Option C (Secondary spermatocytes) is correct because secondary spermatocytes are haploid cells formed after meiosis I.
122
Hard
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Remembering
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Gastrulation means
View answer and explanation
Correct option: B
Formation of 3 germ layers
Option B (Formation of 3 germ layers) is correct because gastrulation is the process where the blastula reorganizes into a three-layered structure: ectoderm, mesoderm, and endoderm.
123
Hard
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Remembering
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The longest visceral muscle cell is present in
View answer and explanation
Correct option: C
Pregnant uterus
Option C (Pregnant uterus) is correct because during pregnancy, the uterine smooth muscle cells (myometrium) undergo hypertrophy and hyperplasia, leading to a significant increase in size, making them the longest visceral muscle cells.
124
Medium
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Application
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In an analysis of a semen sample, it was observed that the total number of sperms was 18 million, of which 80%
showed high motility and 20% shows less motility. How many sperms have a Y chromosome (approx.)
showed high motility and 20% shows less motility. How many sperms have a Y chromosome (approx.)
View answer and explanation
Correct option: A
9 million
Option A (9 million) is correct because, assuming an equal distribution of X and Y chromosomes, approximately half of the total sperm count will carry a Y chromosome. Therefore, 18 million / 2 = 9 million.
125
Easy
125 of 247
Understanding
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Select the INCORRECT statement about ‘menopause’
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Correct option: C
It is a disease found in older people
Option C (It is a disease found in older people) is correct because menopause is a natural biological process, not a disease.
126
Medium
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Remembering
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Which chemical event of fertilization involves the presence of hyaluronidase enzyme?
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Correct option: A
Acrosomal reaction
Option A (Acrosomal reaction) is correct because the acrosomal reaction involves the release of hyaluronidase, an enzyme that helps the sperm penetrate the zona pellucida of the egg.
127
Easy
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Remembering
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Spermatogenesis is influenced by
View answer and explanation
Correct option: B
FSH
Option B (FSH) is correct because Follicle-Stimulating Hormone (FSH) is crucial for initiating and maintaining spermatogenesis in the seminiferous tubules of the testes.
128
Medium
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Understanding
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Milk secretion is maintained by …A… . This hormone inhibits the release from the pituitary and counters the …B… and …C… . Hence in nourishing mother, the menstrual cycle is suppressed. Here A, B and C are
View answer and explanation
Correct option: B
A-prolactin, B-FSH, C-LH
Option B (A-prolactin, B-FSH, C-LH) is correct because prolactin maintains milk secretion and inhibits FSH and LH release.
129
Easy
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Remembering
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External genitalia of male are called
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Correct option: B
Penis
Option B (Penis) is correct because the penis is the external male reproductive organ.
130
Easy
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Remembering
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During embryonic development, the body of foetus is covered with fine hair by the end of
View answer and explanation
Correct option: B
Second trimester
Option B (Second trimester) is correct because fine hair (lanugo) begins to cover the fetus's body by the end of the second trimester (around the fifth or sixth month of pregnancy).
131
Medium
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Understanding
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The haemoglobin of a human foetus
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Correct option: D
Has higher affinity for oxygen than that of an adult
Option D (Has higher affinity for oxygen than that of an adult) is correct because fetal hemoglobin has a higher affinity for oxygen to facilitate oxygen transfer from the mother's blood.
132
Medium
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Analyzing
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Assertion: In a Graafian follicle, the primary oocyte and the follicular cells may be regarded as sibling cells.
Reason: Both arise from the same parent cell the oogonium by mitotic division.
Reason: Both arise from the same parent cell the oogonium by mitotic division.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
Option A is correct because both the primary oocyte and follicular cells in a Graafian follicle originate from the same oogonium through mitotic division.
133
Hard
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Understanding
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The sperm and the egg make different contributions to zygote. Which of the following statements about their contributions are there?
i) Sperm contributes most of the mitochondria
ii) Egg contributes most of the cytoplasm
iii) Both sperm and egg contribute haploid nucleus
iv) Both sperm and egg contribute centrioles
i) Sperm contributes most of the mitochondria
ii) Egg contributes most of the cytoplasm
iii) Both sperm and egg contribute haploid nucleus
iv) Both sperm and egg contribute centrioles
View answer and explanation
Correct option: B
(ii) and (iii)
Option B ((ii) and (iii)) is correct because the egg contributes most of the cytoplasm and both sperm and egg contribute a haploid nucleus to form the diploid zygote.
134
Easy
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Remembering
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Proliferation of endometrium of uterus is controlled by
View answer and explanation
Correct option: D
Oestrogen
Option D (Oestrogen) is correct because estrogen stimulates the proliferation of the endometrium during the follicular phase.
135
Easy
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Understanding
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Androgen stimulates the …A… FSH acts on the …B… and stimulates factors for spermiogenesis. Here A and B refers to
View answer and explanation
Correct option: C
A-Spermatogenesis; B-Sertoli cell
Option C (A-Spermatogenesis; B-Sertoli cell) is correct because androgens stimulate spermatogenesis, and FSH acts on Sertoli cells to promote spermiogenesis.
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136
Medium
136 of 247
Remembering
+4 | -1
With increasing age, secretion of which of the following reduces to almost half?
View answer and explanation
Correct option: C
Hgh
Option C (Hgh) is correct because the secretion of Human Growth Hormone (HGH) reduces significantly with increasing age.
137
Medium
137 of 247
Remembering
+4 | -1
Capacitation of sperm occurs in
View answer and explanation
Correct option: A
Female genital tract
Option A (Female genital tract) is correct because capacitation, the process that enables sperm to fertilize an egg, occurs in the female reproductive tract.
138
Easy
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Understanding
+4 | -1
Which of the following is diploid cell forms two equal haploid cells?
View answer and explanation
Correct option: A
Primary spermatocyte
Option A (Primary spermatocyte) is correct because primary spermatocytes are diploid cells that undergo meiosis I to form two haploid secondary spermatocytes.
139
Medium
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Analyzing
+4 | -1
Mark the odd one
View answer and explanation
Correct option: A
Acrosome
Option A (Acrosome) is correct because the acrosome is a structure of the sperm cell, while the other options are parts of the female reproductive system.
140
Hard
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Understanding
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Number of chromosomes present in secondary spermatocyte is
View answer and explanation
Correct option: B
23
Option B (23) is correct because secondary spermatocytes are haploid cells, containing half the number of chromosomes as the diploid primary spermatocytes.
141
Medium
141 of 247
Analyzing
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How many is/are an incorrect matches in the following
View answer and explanation
Correct option: A
Menopause: Cessation of menstruation in primate females
The correct answer is B (Cleavage: Rapid meiotic cell division occurs inside the fallopian tube) because cleavage involves rapid MITOTIC, not meiotic, cell division.
142
Hard
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Understanding
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Polyspermy is prevented by all the events, except
View answer and explanation
Correct option: D
No Sodium gates in the egg membrane getting closed
Option D (No Sodium gates in the egg membrane getting closed) is correct because the closure of sodium channels is not a direct mechanism to prevent polyspermy. The fast block to polyspermy involves electrical changes due to influx of sodium ions, but the long-term block involves the cortical reaction and zona reaction.
143
Easy
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Understanding
+4 | -1
Scrotum remains connected with abdomen or pelvic cavity by
View answer and explanation
Correct option: B
Inguinal canals
Option B (Inguinal canals) is correct because the scrotum is connected to the abdomen or pelvic cavity through the inguinal canals, which allow passage of the spermatic cord.
144
Medium
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Remembering
+4 | -1
Progesterone is needed for the maintenance
View answer and explanation
Correct option: C
Of endometrium wall
Option C (Of endometrium wall) is correct because progesterone is essential for maintaining the endometrium lining of the uterus during pregnancy.
145
Hard
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Remembering
+4 | -1
The formation of gametes is termed as
View answer and explanation
Correct option: C
Gametogenesis
Option C (Gametogenesis) is correct because gametogenesis is the process of forming gametes (sperm in males and eggs in females) through meiosis.
146
Easy
146 of 247
Understanding
+4 | -1
Select the incorrect statement w.r.t. parturition.
View answer and explanation
Correct option: C
Foetal ejection reflex triggers release of oxytocin from foetal pituitary
Option C (Foetal ejection reflex triggers release of oxytocin from foetal pituitary) is correct because the fetal ejection reflex triggers the release of oxytocin from the *maternal* pituitary, not the fetal pituitary.
147
Hard
147 of 247
Remembering
+4 | -1
Bartholin's glands of female correspond to which glands in male?
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Correct option: A
Cowper's glands
Option A (Cowper's glands) is correct because Bartholin's glands in females are homologous to Cowper's glands (bulbourethral glands) in males, both secreting lubricating fluids.
148
Medium
148 of 247
Analyzing
+4 | -1
Which of the following statements are true for oogenesis, but do not hold true for spermatogenesis?
a) It is initiated at puberty
b) It results in formation of 4 haploid gametes
c) Meiosis occurs continuously in a mitotically dividing stem cells.
d) Meiosis produces unequal cells.
e) It does not cease after 50 years
a) It is initiated at puberty
b) It results in formation of 4 haploid gametes
c) Meiosis occurs continuously in a mitotically dividing stem cells.
d) Meiosis produces unequal cells.
e) It does not cease after 50 years
View answer and explanation
Correct option: B
d only
Option B (d only) is correct because only statement (d) is true for oogenesis but not for spermatogenesis. Oogenesis results in unequal cells (ovum and polar bodies), while spermatogenesis results in equal cells (spermatids).
149
Medium
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Understanding
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In human beings
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because in human beings, the chorion and amnion are well developed, the allantois and yolk sac are less developed, and the yolk cell has very little yolk.
150
Easy
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Remembering
+4 | -1
Graafian follicle after releasing ovum is called
View answer and explanation
Correct option: A
Corpus luteum
Option A (Corpus luteum) is correct because after releasing the ovum, the Graafian follicle transforms into the corpus luteum, which secretes progesterone.
Revision notes and key takeaways
Review HUMAN REPRODUCTION in your textbook or class notes, then use this set to check your understanding.
Showing 121-150 of 247 questions