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

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181 Both corpus luteum and macula lutea are
1 found in human ovaries
2 a source of hormones
3 characterized by a yellow colour
4 contributory in maintaining pregnancy

Answer: characterized by a yellow colour
182 If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from
1 Vagina to uterus
2 Testes to epididymis
3 Epididymis to vas deferens
4 Ovary to uterus

Answer: Testes to epididymis
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183 Bartholin’s glands are situated
1 on the side of head of some amphibians
2 at the reduced tail end of birds
3 on either side of vagina in humans
4 on either side of vas deferens in humans

Answer: on either side of vagina in humans
184 The secretory phase in the human menstrual cycle is also called
1 Luteal phase and lasts for about 6 days
2 Follicular phase lasting for about 6 days
3 Luteal phase and lasts for about 13 days
4 Follicular phase and lasts for about 13 days

Answer: Luteal phase and lasts for about 13 days
185 Which one of the following statements is correct?
1 FSH and LH occur in both males and females
2 FSH and LH stimulate the follicle to secrete estrogen.
3 The ovarian cycle depends on the blood levels of FSH and LH.
4 All of these are correct.

Answer: All of these are correct.
186 Which one of the following statement is incorrect?
1 Scrotum regulates the temperature of the developing sperm within the testes
2 Middle piece of a sperm contains many mitochondria to provide energy for movement
3 Epididymis and ductus deferens also store sperm
4 Sperm contributes cytoplasm and organelles to zygote

Answer: Sperm contributes cytoplasm and organelles to zygote
187 A protective layer around testes is
1 Tunica adventitia
2 Tunica media
3 Tunica vasculosa
4 Tunica albuginea

Answer: Tunica media
188 Which one of the following statements about morula in humans is correct?
1 It has more cytoplasm and more DNA than an uncleaved zygote
2 It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
3 It has far less cytoplasm as well as less DNA than in an uncleaved zygote
4 It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote

Answer: It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
189 Immediately after ovulation, the mammalian egg is covered by a membrane known as:
1 Chorion
2 Zona pellucida
3 Corona radiata
4 Vitelline membrane

Answer: Zona pellucida
190 At the time of implantation, the human embryo is called
1 zygote
2 blastocyst
3 embryo
4 foetus

Answer: blastocyst
191 In spermatogenesis, reduction division of chromosome occurs during conversion of
1 Secondary spermatocytes to spermatids
2 Primary spermatocytes to secondary spermatocytes
3 Spermatogonia to primary spermatocytes
4 Spermatids to sperms

Answer: Primary spermatocytes to secondary spermatocytes
192 32-celled stage of human embryo is
1 Smaller than fertilized egg
2 Same size as fertilized egg
3 Two times the size of fertilized egg
4 Four times the size of fertilized egg

Answer: Same size as fertilized egg
193 Foramen ovale
1 Is a shallow depression in the interventricular septum
2 Is a condition in which the heart valves do not completely close
3 Is a connection between the pulmonary trunk and the aorta in the fetus
4 Connects the two atria in the fetal heart

Answer: Connects the two atria in the fetal heart
194 Vasa efferentia are the ductules leading from
1 Epididymis to urethra
2 Testicular lobules to rete testis
3 Rete testis to vas deferens
4 Vas deferens to epididymis

Answer: Rete testis to vas deferens
195 Conversion of spermatids into sperms is
1 Spermiogenesis
2 Ppermatogenesis
3 Gametogenesis
4 Metamorphosis

Answer: Spermiogenesis

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