R4RIN – MCQs, Mock Tests | Biology Biology MCQS[NEET-2021 to 2022]-Human reproduction

The Leydig cells as found in the human body are the secretory source of

1. Glucagon
2. Androgens
3. Progesterone
4. Intestinal mucus

✅ Correct Answer: 2

Signals for parturition originate from

1. Placenta only
2. Fully developed foetus only
3. Both placenta as well as fully developed foetus
4. Oxytocin released from maternal pituitary

✅ Correct Answer: 3

Which one of the following statements is false in respect of viability of mammalian sperm?

1. Sperm is viable for only up to 24 hours
2. Viability of sperm is determined by its motility
3. Sperms must be concentrated in a thick suspension
4. None of the above

✅ Correct Answer: 1

Which one of the following statements is correct?

1. FSH and LH occur in both males and females
2. The ovarian cycle depends on the blood levels of FSH and LH.
3. FSH and LH stimulate the follicle to secrete estrogen.
4. All of the above

✅ Correct Answer: 4

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

✅ Correct Answer: 4

The part of Fallopian tube closest to the ovary is

1. Infundibulum
2. Isthmus
3. Cervix
4. Ampulla

✅ Correct Answer: 1

About which day in a normal human menstrual cycle does rapid secretion of LH (Popularly called LH-surge) normally occurs?

1. 5th day
2. 11th day
3. 14th day
4. 20th day

✅ Correct Answer: 3

Ovulation in the human female normally takes place during the menstrual cycle

1. At the end of the proliferative phase
2. Just before the end of the secretory cycle
3. At the mid secretory phase
4. At the beginning of the proliferative phase

✅ Correct Answer: 1

Which of the following structures are derivatives of the endoderm?

1. Skin and nerve cord
2. Alimentary canal and respiratory structures
3. Muscles and blood
4. Excretory and reproductive structures

✅ Correct Answer: 2

In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?

1. 6:01:00
2. 6:00:01
3. 3:01:03
4. 3:02:03

✅ Correct Answer: 1

Human seminal plasma, the fluid part of semen, is produced by contributions from the: i. Urethra ii. Prostate iii. Seminal vesicle iv. Bulbourethral gland

1. i and iii
2. i and iv
3. i, iii and iv
4. ii, iii and iv

✅ Correct Answer: 4

Which one of the following statement is correct?

1. Spermatogenesis is the formation of sperm cells.
2. Spermatogenesis occurs in the seminiferous tubules.
3. Follicle-stimulating hormone (FSh) indirectly stimulates spermatogenesis.
4. All of these are correct

✅ Correct Answer: 4

Which one of the following statements is incorrect about menopause?

1. Generally occurs between the ages of 45 and 55
2. Causes the cessation of the female reproductive cycle
3. Anterior pituitary no longer produces FSH and LH
4. Ovaries slowly reduce their secretion of estrogen

✅ Correct Answer: 3

Which one of the following statement is correct about sertoli cells also called as nurse cells?

1. Found in adrenal cortex and secrete adrenaline
2. Found in ovaries and secrete progesterone
3. Found in pancreas and secrete cholecystokinin
4. Found in Seminiferous tubules and provide nutrition of germ cells

✅ Correct Answer: 4

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 m
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 zyg

✅ Correct Answer: 2

Foetal ejection reflex in human female is induced by

1. Differentiation of mammary glands
2. Pressure exerted by amniotic fluid
3. Release of oxytocin from pituitary
4. Fully developed foetus and placenta

✅ Correct Answer: 4

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

1. Retention of well-developed corpus luteum
2. Fertilisation of the ovum
3. Maintenance of the hypertrophical endometrial lining
4. Maintenance of high concentration of sex-hormones in the blood stream

✅ Correct Answer: 4

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

✅ Correct Answer: 3

Correct sequence of embryo development:

1. Gamete &#8594; Zygote &#8594; Morula &#8594; Blastula &#8594; Gastrula
2. Gamete &#8594; Zygote &#8594; Blastula &#8594; Morula &#8594; Gastrula
3. Gamete &#8594; Neurula &#8594; Gastrula
4. Gamete &#8594; Neurula &#8594; Morula

✅ Correct Answer: 1

Which one of the following statements is incorrect about menstruation?

1. The beginning of the cycle of menstruation is called menarche
2. During normal menstruation about 40 ml blood is lost
3. The menstrual fluid can easily clot
4. At menopause in the female, there is especially abrupt increase in gonadotr

✅ Correct Answer: 3

The hemoglobin of a human foetus:

1. Has a higher affinity for oxygen than that of an adult
2. Has a lower affinity for oxygen than that of the adult
3. Its affinity for oxygen is the same as that of an adult
4. Has only two protein subunits instead of four

✅ Correct Answer: 1

What happens during fertilisation in humans after many sperms reach close to the ovum?

1. Cells of corona radiata trap all the sperms except one
2. Only two sperms nearest the ovum penetrate zona pellucida
3. Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona
4. All sperms except the one nearest to the ovum lose their tails

✅ Correct Answer: 3

ZIFT is

1. Transfer of mixture of sperms and ova into the fallopian tube
2. Transfer of embryo into the uterus
3. Transfer of zygote into the fallopian tube
4. Transfer of mixture of sperms and ova into the uterus

✅ Correct Answer: 3

At the time of implantation, the human embryo is called

1. zygote
2. blastocyst
3. embryo
4. foetus

✅ Correct Answer: 2

Sertoli cells are nourishing cells in the testis. They also secrete a hormone. Identify the same.

1. Inhibin
2. Gonadotropin
3. Testosterone
4. Relaxin

✅ Correct Answer: 1

The type of connective tissue that is associated with the Umbilical cord is:

1. Adipose connective tissue
2. Jelly-like connective tissue
3. Areolar connective tissue
4. Reticular connective tissue

✅ Correct Answer: 2

The chemical substance released by activated spermatozoa that acts on the ground substances of the follicle cells is known as

1. Progesterone
2. Hyaluronidase
3. Relaxin
4. Gonadotropin

✅ Correct Answer: 2

Usually the first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

1. Third month
2. Fourth month
3. Fifth month
4. Sixth month

✅ Correct Answer: 3

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

✅ Correct Answer: 2

Which of the following groups of cells in the male gonad, represent haploid cells?

1. Primary spermatocytes
2. Spermatogonial cells
3. Germinal epithelial cells
4. Secondary spermatocytes

✅ Correct Answer: 4

In the human female, menstruation can be deferred by the administration of:

1. Combination of estrogen and progesterone
2. Combination of FSH and LH
3. LH only
4. FSH only

✅ Correct Answer: 1

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

✅ Correct Answer: 3

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 mo
3. Epididymis and ductus deferens also store sperm.
4. Sperm contributes cytoplasm and organelles to zygote.

✅ Correct Answer: 4

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

✅ Correct Answer: 2

Which one of the followings causes the mammary glands to enlarge at puberty?

1. Testosterone
2. Progesterone
3. Estrogen
4. Oxytocin

✅ Correct Answer: 3

What is the inner lining of the uterus called?

1. Cervix
2. Oviduct
3. Endometrium
4. Fimbriae

✅ Correct Answer: 3

Where does fertilization usually take place?

1. Cervix
2. Vagina
3. Uterus
4. Oviduct

✅ Correct Answer: 4

The process of sperm production takes place in the ______.

1. Epididymis
2. Vas deferens
3. Prostate glands
4. Seminiferous tubules

✅ Correct Answer: 4

Which one of the followings secretes the gonadotropic hormones?

1. Adrenal
2. Anterior pituitary
3. Posterior pituitary
4. Thyroid

✅ Correct Answer: 2

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

✅ Correct Answer: 3

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

✅ Correct Answer: 3

Which one of the followings is incorrectly matched regarding female reproductive organs?

1. Ovaries - eggs and sex hormones are produced
2. Oviducts - serves as the site of fertilization
3. Uterus - Serves as the birth canal
4. Cervix - Contains opening to embryo/fetus

✅ Correct Answer: 3

Which one of the followings is incorrectly matched regarding male reproductive organs?

1. Testes: Sperm and sex hormones are produced
2. Epididymis: Ducts where sperm mature
3. Prostate gland: Contributes fluid to semen
4. Urethra: Contributes nutrients and mucus-containing fluid to semen

✅ Correct Answer: 4

Which one of the following events occurs in luteal phase (or secretory phase) of the menstrual cycle?

1. Follicle-stimulating hormone (FSH) secretion begins
2. Follicle maturation takes place
3. Corpus luteum forms
4. Endometrium breaks down

✅ Correct Answer: 3

Where do the female gonads (paired ovaries) lie?

1. Pelvic cavity
2. Thoracic cavity
3. Abdominal cavity
4. Scrotal sacs

✅ Correct Answer: 1

Which one of the following statements about human sperm is correct?

1. Acrosome serves no particular function
2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fer
3. Acrosome serves as a sensory structure leading the sperm towards the ovum
4. All of the above

✅ Correct Answer: 2

The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for

1. Providing a secondary sexual feature for exhibiting the male sex
2. Maintaining the scrotal temperature lower than the internal body temperatur
3. Escaping any possible compression by the visceral organs
4. Providing more space for the growth of epididymis

✅ Correct Answer: 2

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

✅ Correct Answer: 2

A cross section at the midpoint of middle piece of human sperm will show

1. Centriole, mitochondria and 9 + 2 arrangement of microtubules
2. Centriole and mitochondria
3. Mitochondria and 9 + 2 arrangement of microtubules
4. 9 + 2 arrangement of microtubules only

✅ Correct Answer: 3

A mature sperm has

1. A pair of flagella
2. A nucleus, an acrosome and a centriole
3. A nucleus, an acrosome, a pair of centrioles
4. A nucleus, an acrosome, a pair of centrioles and a tail

✅ Correct Answer: 4