Class 12/Question Bank
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Questions on Human Reproduction
Which of the following is the primary male sex organ? a) Vas deferens b) Epididymis c) Testis d) Prostate gland
The process of formation of sperms is called: a) Oogenesis b) Spermatogenesis c) Gametogenesis d) Fertilization
The female reproductive system includes: a) Ovaries, oviducts, uterus, vagina, external genitalia b) Testis, epididymis, vas deferens, seminal vesicles c) Prostate gland, bulbourethral glands, urethra d) Mammary glands, fallopian tubes, cervix
Fertilization in humans normally occurs in the: a) Uterus b) Ovary c) Vagina d) Fallopian tube
The hormone responsible for the development of secondary sexual characteristics in males is: a) Estrogen b) Progesterone c) Testosterone d) Luteinizing hormone
The inner lining of the uterus is called the: a) Perimetrium b) Myometrium c) Endometrium d) Cervix
The process of release of ovum from the ovary is called: a) Menstruation b) Ovulation c) Implantation d) Parturition
The placenta is formed by the interdigitation of: a) Uterine tissue and fetal tissue b) Ovarian tissue and uterine tissue c) Fetal tissue and umbilical cord d) Maternal blood and fetal blood
The gestation period in humans is approximately: a) 6 months b) 9 months c) 12 months d) 3 months
The milk-producing glands in females are: a) Adrenal glands b) Thyroid glands c) Mammary glands d) Pituitary glands
The head of the sperm contains: a) Mitochondria b) Nucleus c) Centriole d) Cytoplasm
The acrosome of sperm contains: a) Enzymes for fertilization b) Mitochondria for energy c) Genetic material d) Tail for motility
The middle piece of the sperm contains: a) Nucleus b) Acrosome c) Mitochondria d) Tail
The process of sperm formation begins at: a) Birth b) Puberty c) Adulthood d) Old age
The cells that provide nourishment to the developing sperms are: a) Leydig cells b) Spermatogonia c) Sertoli cells d) Interstitial cells
The primary spermatocyte is: a) Haploid b) Diploid c) Triploid d) Tetraploid
How many sperms are formed from one primary spermatocyte? a) 1 b) 2 c) 3 d) 4
The process of conversion of spermatids into spermatozoa is called: a) Spermatogenesis b) Spermiogenesis c) Spermiation d) Oogenesis
The female gonad is the: a) Uterus b) Ovary c) Vagina d) Fallopian tube
The primary oocyte is: a) Haploid b) Diploid c) Triploid d) Tetraploid
The process of formation of ovum is called: a) Spermatogenesis b) Oogenesis c) Gametogenesis d) Fertilization
The first meiotic division of the primary oocyte is completed: a) Before birth b) At puberty c) After fertilization d) During ovulation
The secondary oocyte is released from the ovary at: a) Metaphase I b) Prophase I c) Metaphase II d) Anaphase II
The corpus luteum secretes: a) Estrogen b) Progesterone c) Testosterone d) Luteinizing hormone
The menstrual cycle typically lasts for: a) 14 days b) 21 days c) 28 days d) 35 days
The follicular phase of the menstrual cycle is characterized by: a) Growth of ovarian follicles b) Secretion of progesterone c) Breakdown of endometrium d) Ovulation
Ovulation is induced by a surge of: a) FSH b) LH c) Estrogen d) Progesterone
The luteal phase of the menstrual cycle is characterized by: a) Development of corpus luteum b) Growth of ovarian follicles c) Menstrual flow d) Ovulation
Implantation is the process of: a) Fertilization of ovum b) Attachment of blastocyst to uterine wall c) Release of ovum from ovary d) Formation of placenta
The outer layer of the blastocyst is called: a) Inner cell mass b) Trophoblast c) Embryoblast d) Zona pellucida
The inner cell mass differentiates into: a) Trophoblast b) Embryoblast c) Placenta d) Umbilical cord
The embryonic stage after implantation is called: a) Zygote b) Morula c) Blastocyst d) Gastrula
The three germ layers are formed during: a) Cleavage b) Implantation c) Gastrulation d) Organogenesis
The organ that connects the fetus to the uterine wall is the: a) Umbilical cord b) Placenta c) Amnion d) Chorion
The hormone secreted by the placenta is: a) hCG b) FSH c) LH d) Estrogen
The fluid-filled sac that surrounds the embryo is the: a) Chorion b) Amnion c) Yolk sac d) Allantois
The process of delivery of the fetus is called: a) Implantation b) Gestation c) Parturition d) Lactation
The hormone that stimulates uterine contractions during parturition is: a) Estrogen b) Progesterone c) Oxytocin d) Prolactin
The first milk produced after childbirth is called: a) Milk b) Colostrum c) Whey d) Casein
The male reproductive system consists of: a) A pair of testes, accessory ducts, glands, and external genitalia b) A pair of ovaries, oviducts, uterus, vagina, and external genitalia c) Mammary glands, fallopian tubes, cervix d) Prostate gland, bulbourethral glands, urethra
The testes are located in the scrotum because: a) It provides protection b) It maintains a lower temperature for spermatogenesis c) It provides nourishment d) It helps in sperm transport
The seminiferous tubules are lined by: a) Leydig cells b) Sertoli cells c) Spermatogonia d) Both b and c
The cells that synthesize and secrete testicular hormones (androgens) are: a) Sertoli cells b) Spermatogonia c) Leydig cells d) Primary spermatocytes
The male accessory ducts include: a) Rete testis, vasa efferentia, epididymis, vas deferens b) Seminal vesicles, prostate gland, bulbourethral glands c) Urethra, ejaculatory duct d) Seminiferous tubules, epididymis
The male accessory glands include: a) Seminal vesicles, prostate gland, bulbourethral glands b) Rete testis, vasa efferentia, epididymis c) Testis, epididymis d) Vas deferens, urethra
The seminal plasma is rich in: a) Fructose, calcium, and certain enzymes b) Glucose, sodium, and proteins c) Amino acids, potassium, and lipids d) Water, chloride, and vitamins
The female reproductive system consists of: a) A pair of ovaries, a pair of oviducts, a uterus, vagina, and external genitalia b) Testes, epididymis, vas deferens, seminal vesicles c) Prostate gland, bulbourethral glands, urethra d) Mammary glands, fallopian tubes, cervix
The ovaries are connected to the pelvic wall and uterus by: a) Ligaments b) Tendons c) Muscles d) Bones
The oviducts are also known as: a) Uterus b) Vagina c) Fallopian tubes d) Cervix
The part of the fallopian tube closer to the ovary is the: a) Isthmus b) Ampulla c) Infundibulum d) Fimbriae
The finger-like projections of the infundibulum are called: a) Cilia b) Microvilli c) Fimbriae d) Villi
The uterus is also called the: a) Womb b) Birth canal c) Vagina d) Cervix
The uterus opens into the vagina through a narrow: a) Fundus b) Body c) Cervix d) Isthmus
The external genitalia in females include: a) Mons pubis, labia majora, labia minora, hymen, clitoris b) Vagina, cervix, uterus c) Ovaries, oviducts d) Mammary glands
The mammary glands are modified: a) Sebaceous glands b) Sweat glands c) Apocrine glands d) Endocrine glands
The process of gamete formation is called: a) Fertilization b) Implantation c) Gametogenesis d) Parturition
Spermatogonia are: a) Haploid b) Diploid c) Triploid d) Tetraploid
Secondary spermatocytes are: a) Haploid b) Diploid c) Triploid d) Tetraploid
Spermatids are: a) Haploid b) Diploid c) Triploid d) Tetraploid
The release of sperms from the seminiferous tubules is called: a) Spermatogenesis b) Spermiogenesis c) Spermiation d) Ejaculation
Oogonia are: a) Haploid b) Diploid c) Triploid d) Tetraploid
The primary oocyte grows in size and gets surrounded by a layer of granulosa cells to form the: a) Primary follicle b) Secondary follicle c) Tertiary follicle d) Graafian follicle
The fluid-filled cavity in the tertiary follicle is called the: a) Antrum b) Follicle c) Corpus luteum d) Zona pellucida
The secondary oocyte forms a new membrane called: a) Theca interna b) Theca externa c) Zona pellucida d) Corona radiata
The rupture of the Graafian follicle and release of the secondary oocyte is called: a) Menstruation b) Ovulation c) Implantation d) Parturition
The menstrual phase is characterized by: a) Secretion of LH b) Breakdown of endometrial lining c) Growth of follicles d) Ovulation
The proliferative phase is also called the: a) Menstrual phase b) Follicular phase c) Luteal phase d) Secretory phase
The secretory phase is also called the: a) Menstrual phase b) Follicular phase c) Luteal phase d) Proliferative phase
The fusion of male and female gametes is called: a) Implantation b) Gestation c) Fertilization d) Parturition
The fertilized egg is called a: a) Gamete b) Zygote c) Morula d) Blastocyst
The rapid mitotic divisions of the zygote are called: a) Gastrulation b) Organogenesis c) Cleavage d) Implantation
The solid ball of 8-16 cells formed after cleavage is called a: a) Zygote b) Blastocyst c) Morula d) Gastrula
The blastocyst gets embedded in the endometrium of the uterus during: a) Fertilization b) Cleavage c) Implantation d) Gastrulation
The finger-like projections appearing on the trophoblast after implantation are called: a) Villi b) Microvilli c) Chorionic villi d) Fimbriae
The chorionic villi and uterine tissue become interdigitated to form the: a) Umbilical cord b) Amnion c) Placenta d) Yolk sac
The placenta acts as an: a) Endocrine gland b) Exocrine gland c) Both a and b d) Neither a nor b
The umbilical cord connects the: a) Placenta to the uterus b) Fetus to the placenta c) Fetus to the uterus d) Mother to the fetus
The inner cell mass contains certain cells called: a) Trophoblast cells b) Stem cells c) Germ cells d) Somatic cells
The outer ectoderm, middle mesoderm, and inner endoderm are formed during: a) Cleavage b) Implantation c) Gastrulation d) Organogenesis
The period of development from conception to birth is called: a) Implantation b) Parturition c) Gestation d) Lactation
The signals for parturition originate from the: a) Placenta only b) Fully developed fetus only c) Both placenta and fully developed fetus d) Uterus only
The hormone that causes milk ejection is: a) Prolactin b) Oxytocin c) Estrogen d) Progesterone
The male reproductive organ that produces sperm and testosterone is the: a) Epididymis b) Vas deferens c) Testis d) Seminal vesicle
The coiled tube on the posterior side of the testis where sperm mature is the: a) Vas deferens b) Epididymis c) Rete testis d) Ejaculatory duct
The tube that carries sperm from the epididymis to the ejaculatory duct is the: a) Urethra b) Vas deferens c) Seminiferous tubule d) Vasa efferentia
The gland that secretes a thick, yellowish fluid containing fructose to nourish sperm is the: a) Prostate gland b) Bulbourethral gland c) Seminal vesicle d) Cowper's gland
The gland that secretes a milky, slightly acidic fluid that activates sperm is the: a) Seminal vesicle b) Bulbourethral gland c) Prostate gland d) Cowper's gland
The female reproductive organ that produces eggs and female hormones is the: a) Uterus b) Fallopian tube c) Ovary d) Vagina
The funnel-shaped part of the fallopian tube near the ovary is the: a) Isthmus b) Ampulla c) Infundibulum d) Fimbriae
The muscular organ where a fertilized egg implants and develops is the: a) Ovary b) Fallopian tube c) Uterus d) Vagina
The narrow opening between the uterus and the vagina is the: a) Fundus b) Cervix c) Isthmus d) Body
The external female genitalia collectively known as the vulva include: a) Mons pubis, labia majora, labia minora, clitoris b) Vagina, cervix, uterus c) Ovaries, fallopian tubes d) Urethra, anus
The erectile tissue in the female external genitalia, homologous to the penis, is the: a) Labia minora b) Hymen c) Clitoris d) Mons pubis
The process of egg formation in females is called: a) Spermatogenesis b) Oogenesis c) Gametogenesis d) Fertilization
The primordial germ cells in females differentiate into: a) Primary oocytes b) Secondary oocytes c) Oogonia d) Polar bodies
The primary oocytes are arrested in which stage of meiosis? a) Prophase I b) Metaphase I c) Anaphase I d) Telophase I
The mature ovarian follicle is called the: a) Primary follicle b) Secondary follicle c) Tertiary follicle d) Graafian follicle
After ovulation, the ruptured Graafian follicle transforms into the: a) Corpus albicans b) Corpus luteum c) Corpus spongiosum d) Corpus cavernosum
The hormone that maintains the uterine lining during pregnancy is: a) Estrogen b) Progesterone c) LH d) FSH
The cessation of menstruation in females is called: a) Menarche b) Menopause c) Ovulation d) Puberty
/Class-12/Question-Bank/Unit_1_Chapter_2_Human_Reproduction_Questions.mdx