Class 12 Biology MCQ Chapter 3 Human Reproduction
Prepare effectively for your board examinations with our Class 12 Biology MCQ Chapter 3 Human Reproduction English Medium collection. This article offers a wide range of important multiple-choice questions (MCQs) with answers, specially designed for AHSEC Higher Secondary students seeking comprehensive revision and exam-oriented practice.
The chapter Human Reproduction provides detailed knowledge about the reproductive system, reproductive health, and the process of human reproduction. Students will explore topics such as the male and female reproductive systems, gametogenesis, menstrual cycle, fertilization, implantation, pregnancy, embryonic development, parturition, and lactation. These concepts are essential for understanding human biology and are commonly featured in board examinations.
All MCQs are prepared according to the latest AHSEC syllabus and examination guidelines. The questions are designed to help students revise important concepts, improve analytical thinking, and strengthen their understanding of key biological processes. Regular practice will enhance confidence and improve performance in objective-type examinations.
Unit VI: Reproduction
Human Reproduction
VSA & MCQ
I. Very Short Question-Answers
Q. What is reproduction in humans?
Ans: Reproduction in humans is a sexual process by which new individuals are produced.
Q. Name the primary male sex organ.
Ans: Testis.
Q. Where are testes located in human males?
Ans: In the scrotum.
Q. What is the function of scrotum?
Ans: It maintains a temperature lower than body temperature for sperm formation.
Q. What are seminiferous tubules?
Ans: Seminiferous tubules are coiled structures in testes where sperms are produced.
Q. What is spermatogenesis?
Ans: Spermatogenesis is the process of formation of sperms.
Q. Name the male sex hormone.
Ans: Testosterone.
Q. What are Leydig cells?
Ans: Leydig cells are interstitial cells that secrete testosterone.
Q. What is the function of Sertoli cells?
Ans: Sertoli cells provide nourishment to developing sperms.
Q. Name the duct that stores sperms temporarily.
Ans: Epididymis.
Q. What is semen?
Ans: Semen is a mixture of sperms and secretions of accessory glands.
Q. Name the female primary sex organ.
Ans: Ovary.
Q. What is oogenesis?
Ans: Oogenesis is the process of formation of ova.
Q. Name the female sex hormones.
Ans: Estrogen and progesterone.
Q. What is ovulation?
Ans: Ovulation is the release of a mature ovum from the ovary.
Q. Name the structure that receives the ovum after ovulation.
Ans: Fallopian tube or oviduct.
Q. Where does fertilization occur in human females?
Ans: Ampullary-isthmic junction of the fallopian tube.
Q. What is menstruation?
Ans: Menstruation is the shedding of the uterine lining in the absence of fertilization.
Q. What is menstrual cycle?
Ans: Menstrual cycle is the cyclic reproductive changes in human females occurring every 28 days.
Q. What is gestation period in humans?
Ans: About 9 months or 280 days.
Q. What is implantation?
Ans: Implantation is the attachment of blastocyst to the uterine wall.
Q. What is placenta?
Ans: Placenta is a vascular connection between mother and foetus.
Q. Name the hormone secreted by placenta.
Ans: Human chorionic gonadotropin (hCG).
Q. What is parturition?
Ans: Parturition is the process of childbirth.
Q. Which hormone induces milk secretion after childbirth?
Ans: Prolactin.
Q. Which hormone helps in milk ejection?
Ans: Oxytocin.
Q. What is colostrum?
Ans: Colostrum is the first milk produced after childbirth rich in antibodies.
Q. What is puberty?
Ans: Puberty is the stage at which reproductive organs become functional.
Q. What is menopause?
Ans: Menopause is the permanent cessation of menstruation in females.
Q. What is fertilization?
Ans: Fertilization is the fusion of male and female gametes.
II. Multiple Choice Questions (MCQs)
Q. The primary male sex organ is:
(a) Penis
(b) Scrotum
(c) Testis
(d) Epididymis
Ans: (c) Testis
Q. Sperms are produced in:
(a) Epididymis
(b) Seminiferous tubules
(c) Vas deferens
(d) Prostate gland
Ans: (b) Seminiferous tubules
Q. The male sex hormone is:
(a) Estrogen
(b) Progesterone
(c) Testosterone
(d) Oxytocin
Ans: (c) Testosterone
Q. Leydig cells secrete:
(a) Progesterone
(b) Testosterone
(c) FSH
(d) LH
Ans: (b) Testosterone
Q. Sertoli cells are associated with:
(a) Nourishment of sperms
(b) Secretion of estrogen
(c) Implantation
(d) Ovulation
Ans: (a) Nourishment of sperms
Q. The female gamete is called:
(a) Sperm
(b) Zygote
(c) Ovum
(d) Blastocyst
Ans: (c) Ovum
Q. Oogenesis occurs in:
(a) Uterus
(b) Ovary
(c) Vagina
(d) Oviduct
Ans: (b) Ovary
Q. Ovulation is the release of:
(a) Embryo
(b) Sperm
(c) Ovum
(d) Zygote
Ans: (c) Ovum
Q. Fertilization in humans occurs in:
(a) Uterus
(b) Ovary
(c) Cervix
(d) Ampullary-isthmic junction
Ans: (d) Ampullary-isthmic junction
Q. Implantation occurs in:
(a) Ovary
(b) Uterus
(c) Cervix
(d) Vagina
Ans: (b) Uterus
Q. The outermost membrane surrounding the foetus is:
(a) Placenta
(b) Chorion
(c) Amnion
(d) Endometrium
Ans: (c) Amnion
Q. Human gestation period is approximately:
(a) 3 months
(b) 6 months
(c) 9 months
(d) 12 months
Ans: (c) 9 months
Q. The structure connecting foetus to placenta is:
(a) Oviduct
(b) Umbilical cord
(c) Endometrium
(d) Cervix
Ans: (b) Umbilical cord
Q. The hormone responsible for milk secretion is:
(a) Oxytocin
(b) Estrogen
(c) Prolactin
(d) Progesterone
Ans: (c) Prolactin
Q. Milk ejection is stimulated by:
(a) Oxytocin
(b) FSH
(c) Testosterone
(d) LH
Ans: (a) Oxytocin
Q. The first milk after childbirth is called:
(a) Plasma
(b) Colostrum
(c) Amniotic fluid
(d) Lymph
Ans: (b) Colostrum
Q. Menstrual cycle in human female averages:
(a) 14 days
(b) 21 days
(c) 28 days
(d) 40 days
Ans: (c) 28 days
Q. Menstruation occurs due to:
(a) Fertilization
(b) Pregnancy
(c) Breakdown of endometrium
(d) Ovulation
Ans: (c) Breakdown of endometrium
Q. The cessation of menstrual cycle is called:
(a) Menarche
(b) Menopause
(c) Ovulation
(d) Gestation
Ans: (b) Menopause
Q. Menarche refers to:
(a) Childbirth
(b) Fertilization
(c) First menstruation
(d) Menopause
Ans: (c) First menstruation
Q. The hormone hCG is secreted by:
(a) Pituitary gland
(b) Placenta
(c) Ovary
(d) Thyroid gland
Ans: (b) Placenta
Q. The fluid-filled cavity of blastocyst is called:
(a) Blastocoel
(b) Amnion
(c) Chorion
(d) Placenta
Ans: (a) Blastocoel
Q. Which hormone maintains pregnancy?
(a) Testosterone
(b) Progesterone
(c) FSH
(d) Thyroxine
Ans: (b) Progesterone
Q. The process of childbirth is called:
(a) Fertilization
(b) Gestation
(c) Parturition
(d) Ovulation
Ans: (c) Parturition
Q. Which hormone causes uterine contraction during childbirth?
(a) Prolactin
(b) Estrogen
(c) Oxytocin
(d) Testosterone
Ans: (c) Oxytocin
Q. Human sperm is:
(a) Diploid
(b) Triploid
(c) Haploid
(d) Tetraploid
Ans: (c) Haploid
Q. The site of sperm maturation is:
(a) Testis
(b) Epididymis
(c) Vas deferens
(d) Urethra
Ans: (b) Epididymis
Q. The female reproductive tract receives sperms through:
(a) Ovary
(b) Uterus
(c) Cervix
(d) Vagina
Ans: (d) Vagina
Q. The embryo gets nourishment from mother through:
(a) Placenta
(b) Ovary
(c) Oviduct
(d) Cervix
Ans: (a) Placenta
Q. The release of ovum from ovary is controlled by:
(a) FSH
(b) LH
(c) TSH
(d) ACTH
Ans: (b) LH
Q. Assertion (A): Testes are located outside the abdominal cavity.
Reason (R): Spermatogenesis requires a temperature lower than body temperature.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (b)
Q. Assertion (A): Fertilization occurs in the uterus.
Reason (R): Implantation occurs in the uterus.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (d)
Q. Assertion (A): Placenta acts as an endocrine tissue.
Reason (R): Placenta secretes hormones like hCG and progesterone.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Q. Assertion (A): Menstruation occurs during pregnancy.
Reason (R): Endometrium is maintained during pregnancy.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (c)
Q. Assertion (A): Colostrum contains antibodies.
Reason (R): Colostrum provides passive immunity to the newborn.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (b)
Q. Assertion (A): LH induces ovulation in females.
Reason (R): LH causes rupture of Graafian follicle.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Q. Assertion (A): Menopause marks the end of reproductive phase in females.
Reason (R): Menopause occurs due to the beginning of oogenesis.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (c)
