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NCERT - Human Reproduction Questions and Answers of Class 12 Biology | GkSeries

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136 Which part of ovary in mammals acts as an endocrine gland after ovulation?
[1] Stroma
[2] Germinal epithelium
[3] Vitelline membrane
[4] Graafian follicle
Answer: Graafian follicle
137 What is true for cleavage?
[1] Size of embryo increases
[2] Size of cells decreases
[3] Size of cells increases
[4] Size of embryo decreases
Answer: Size of cells decreases

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138 Coelom derived from blastocoels is known as
[1] schizocoel
[2] pseudocoelom
[3] haemocoel
[4] enterocoelom
Answer: pseudocoelom
139 Human eggs are
[1] Mesolecithel
[2] Microlecithel
[3] Macrolecithel
[4] Alecithal
Answer: Alecithal
140 Correct sequence of hormone secretion from beginning of menstruation is
[1] FSH, progesterone, estrogen
[2] Estrogen, FSH, progesterone
[3] FSH, estrogen progesterone
[4] Estrogen, progesterone, FSH
Answer: FSH, estrogen progesterone
141 Ovulation in the human female normally takes place during the menstrual cycle
[1] At the end of the proliferative phase
[2] At the beginning of the proliferative phase
[3] Just before the end of the secretory cycle
[4] At the mid secretory phase
Answer: At the end of the proliferative phase
142 The Leydig cells as found in the human body are the secretory source of
[1] Glucagon
[2] Androgens
[3] Progesterone
[4] Intestinal mucus
Answer: Androgens
143 The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
[1] Spermatogonia-spermatid-spermatocyte-sperms
[2] Spermatocyte-spermatogonia-spermatid-sperms
[3] Spermatogonia-spermatocyte-spermatid-sperms
[4] Spermatid-spermatocyte-spermatogonia-sperms
Answer: Spermatogonia-spermatocyte-spermatid-sperms
144 Where do the female gonads (paired ovaries) lie?
[1] Pelvic cavity
[2] Thoracic cavity
[3] Abdominal cavity
[4] Scrotal sacs
Answer: Pelvic cavity
145 Which one of the followings regarding 'Estrogen' is correct?
[1] Causes the endometrium to rebuild
[2] Has no effect on the Wolffian duct
[3] Maintains the secondary sexual characteristics in female
[4] All of these
Answer: All of these
146 Corpus leteum develops from
[1] Oocyte
[2] Nephrostome
[3] Graafian follicle
[4] None of the above
Answer: Graafian follicle
147 Which of the following are secretions produced by the spermatozoa at the time of fertilization?
[1] Fertilizin and sperm lysin
[2] Anti-fertilizin and sperm lysin
[3] Fertilizin and anti-fertilizin
[4] Only sperm lysin
Answer: Anti-fertilizin and sperm lysin
148 About 60% of the semen is formed by secretion of
[1] Cowper’s gland
[2] Seminiferous tubule
[3] Prostate gland
[4] Seminal vesicles
Answer: Seminal vesicles
149 Corpus luteum disintegrates due to non-availability of
[1] LTH
[2] FSH
[3] Progesterone
[4] LH
Answer: LH
150 After ovulation, Graafian follicle forms
[1] Corpus luteum
[2] Corpus albicans
[3] Corpus artesia
[4] Corpus callosum
Answer: Corpus luteum

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