CBSE Class 12 Biology Human Reproduction MCQs Set 05

Question: The term test-tube baby implies that –
a) Fertilisation of ovum takes place in the uterus but develops in the test-tube
b) Fertilisation of ovum takes place in the test-tube and develops in test-tube itself
c) Fertilisation of ovum takes place in the test-tube but it develops in the uterus
d) Fertilisation of ovum takes place in the fallopian tube and embryo develops in the uterus
Answer: c

Question: Menstruation cycle occurs –
a) In all mammals
b) In eutherian animals
c) In metatherian animals
d) In primates
Answer: d

Question: Which one of the following statements is correct?
a) Fertilisation in human takes place in the womb
b) Zygote contains haploid number of chromosomes
c) Changes in zona pellucida prevent polyspermy
d) Primary oocyte inhibits the process of Oogenesis
Answer: c

Question: Hormonal oral contraceptives help in preventing pregnancy by inhibiting –
a) Ova formation
b) Fertilisation
c) Implantation
d) None of these
Answer: b

Question: Which one of the following is the incorrect matching of the events occurring during the menstrual cycle?
a) The tertiary follicle further changes into the mature follicle or Graafian follicle
b) Development of corpus luteum in the proliferative phase with increased secretion of progesterone
c) The oocyte forms a new membrane called zona pellucida
d) The Graafian follicle ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation
Answer: b

Question: The changes that occur in female at the onset of puberty are –
a) The enlargement of breasts
b) Beginning of menstrual cycle
c) Development of pubic hair
d) All the above
Answer: d

Question: How many ovum are released in a single menstrual cycle?
a) Two
b) Numerous
c) One
d) Four
Answer: c

Question: Menstrual flow occurs during –
a) First day of menstrual cycle
b) Last three days of menstrual cycle
c) Middle of menstrual cycle
d) First week of menstrual cycle
Answer: d

Question: Menstrual flow is released from the body of a human female through –
a) Uterus
b) Vagina
c) Penis
d) None of these
Answer: b

Question: If the released ovum is fertilised –
a) Menstruation will take place
b) Menstruation will not take place
c) Menstruation will take place in the middle of cycle
d) Menstruation will take place on 20th day of cycle
Answer: b

Question: During follicular phase –
a) Formation of secondary follicle from primary follicle takes place
b) Formation of tertiary follicle from secondary follicle takes place
c) Formation of mature Graafian follicle from primary follicle takes place
d) None of these
Answer: b

Question: Changes in ovary and uterus during menstrual cycle take place due to change in level of –
a) Pituitary and thyroid hormone
b) Pituitary and androgen hormone
c) Thyroid and ovarian hormone
d) Pituitary and ovarian hormone
Answer: d

Question: Gonadotropins are –
a) Pituitary hormones
b) Thyroid hormones
c) Ovarian hormones
d) Corticoid hormones
Answer: a

Question: The gonadotropins LH and FSH attain a peak level during –
a) Initial 3–5 days of menstrual cycle
b) Initial 5–8 days of menstrual cycle
c) Middle of menstrual cycle
d) Last 5 days of menstrual cycle
Answer: c

Question: Cease of menstrual cycle in humans is known as –
a) Menarch
b) Antrum
c) Menopause
d) Diapause
Answer: c

Question: Fertilisation takes place in –
a) Uterus
b) Cervix
c) Ovary
d) Fallopian tube
Answer: d

Question: Fertilisation is a process in which –
a) Corpus luteum is formed
b) Graafian follicle is formed
c) Sperm fuses with ovum
d) First menstruation begins
Answer: c

Question: Only one sperm fuses with ovum because –
a) Only one sperm reaches the cervix
b) Only one sperm reaches the uterus
c) Contact of one sperm with zona pellucida layer of ovum induces changes in membrane that block the entry of additional sperms
d) Ovum rejects all other sperms after selecting the best one
Answer: c

Question: Second meiotic division of secondary oocyte results in –
a) Two equal size ovum
b) Two secondary polar bodies
c) One ovum and one secondary polar body
d) One ovum and one primary polar body
Answer: c

Question: Nucleus of sperm fuses with nucleus of –
a) Secondary oocyte
b) Secondary polar body
c) Ootid
d) None of these
Answer: c

Question: The duct opening at the tip of the nipple is –
a) Oviduct
b) Lactiferous duct
c) Vulva
d) Uterus
Answer: b

Question: The connective tissue called tunica albuginea covers the
a) Liver
b) Kidney
c) Ovary
d) Primary follicle
Answer: c

Question: The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
a) Fourth month
b) Fifth month
c) Sixth month
d) Third month
Answer: b

Question: Estrogen and progesterone are secreted by
a) Placenta
b) Ova
c) Testis
d) Kidney
Answer: a

Question: Cells of Leydig are found in
a) Liver
b) Ovary
c) Seminiferous tubules
d) Kidney
Answer: c

Question: Kidney and genital organs are formed from
a) Endoderm
b) Ectoderm
c) Mesoderm
d) Ectoderm and Mesoderm
Answer: c

Question: Placenta in human is
a) Haemochorial
b) Metadiscoidal
c) Deciduous
d) All
Answer: d

Question: FSH was administered to a group of rats who had their anterior pituitary glands removed. Compared with the control group of normal rats, which of the following events did NOT take place in the experimental animals?
a) Proliferation of the endometrium
b) Maturation of a Graafian follicle
c) Development of the corpus luteum
d) Build-up of oestrogen in the bloodstream
Answer: c

Question: Leydig cells are found in
a) Testis
b) Ovary
c) Vasa deferens
d) Scrotum
Answer: a

Question: The region of the embryo that first develops a close connection with the uterus is called the –
a) Chorion
b) Amnion
c) Placenta
d) Endometrium
Answer: a

Question: The menstrual cycle begins during –
a) Childhood
b) Puberty
c) Adulthood
d) Infancy
Answer: b

Question: In human the gestation period is –
a) 7 months
b) 9 months
c) 25 months
d) 8 months
Answer: b

Question: Which part of the male reproductive system is the place where sperm complete the maturation process?
a) The prostate gland
b) The epididymis
c) The vas deferens
d) The penis
Answer: b

Question: Termination of gastrulation is indicated by –
a) Obliteration of blastocoel
b) Obliteration of archenteron
c) Closure of blastopore
d) Closure of neural tube
Answer: a

Question: At menopause there is rise in urinary excretion of –
a) STH
b) FSH
c) LTH
d) MSH
Answer: b

Question: The differentiation of spermatids into spermatozoa is called –
a) Spermatogenesis
b) Spermiogenesis
c) Spermatocytogenesis
d) Spermatids
Answer: b

Question: What is the function of amnion?
a) Perspiration
b) Incretion
c) Protection from shock
d) Nutrition
Answer: c

Question: When FSH reaches the testes, it causes the production of –
a) Secondary sex characteristics
b) Testosterone
c) LH
d) Sperm cells
Answer: d

Question: Which of the following set is developed from endoderm?
a) Nervous system, urinary bladder, eye
b) Liver, pancreas, thymus
c) Liver, connective tissue, least
d) Thymus, spinal cord, nervous system
Answer: b

Question: Mark the odd one –
a) Endometrium
b) Corpus luteum
c) Acrosome
d) Graafian follicle
Answer: c