MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
NEET
NEET Biology MCQ
Human Reproduction Mcq
Quiz 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
Identify the wrong statement with reference to transport of oxygen [ NEET 2020]
0%
a) Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin
0%
b) Low pCO2 in alveoli favours the formation of oxyhaemoglobin
0%
c) Binding of oxygen with haemoglobin is mainly related to partial pressure of O2
0%
d) Partial pressure of CO2 can interfere with O2 binding with haemoglobin
Explanation
In the alveoli, where there is high pO2, low pCO2, lesser H+ concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin, whereas in the tissues, where low pO2, high pCO2, high H+ concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin. Answer : (a)
Q.2
Select the correct sequence for transport of sperm cells in male reproductive system. ... [NEET 2019]
0%
a) Testis → Epididymis → Vasa efferentia → Rete testis → Inguinal canal → Urethra
0%
b) Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus
0%
c) Seminiferous tubules → Vasa efferentia → Epididymis → Inguinal canal → Urethra
0%
d) Testis → Epididymis → Vasa efferentia → Vas deferens → Ejaculatory duct → Inguinal canal → Urethra → Urethral meatus
Explanation
The correct sequence for transport of sperm cells in male reproductive system is: Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus. Answer : (b)
Q.3
The contraceptive ‘SAHELI’ .....[NEET 2018]
0%
a) is an IUD.
0%
b) increases the concentration of estrogen and prevents ovulation in females.
0%
c) blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
0%
d) is a post-coital contraceptive.
Explanation
Oral administration of small doses of either progestogens or progestogen–estrogen combinations is another contraceptive method used by the females. They are used in the form of tablets and hence are popularly called the pills. They inhibit ovulation and implantation as well as alter the quality of cervical mucus to prevent/retard entry of sperms. Saheli–the new oral contraceptive for the females contains a non-steroidal preparation. Answer : (c)
Q.4
Select the option including all sexually transmitted diseases. [NEET 2020]
0%
a) AIDS, Malaria, Filaria
0%
b) Cancer, AIDS, Syphilis
0%
c) Gonorrhoea, Syphilis, Genital herpes
0%
d) Gonorrhoea, Malaria, Genital herpes
Explanation
Infections or diseases which are transmitted through sexual intercourse are collectively called sexually transmitted infections (STI) or venereal diseases (VD) or reproductive tract infections (RTI). Gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B and AIDS are some of the common STIs. Answer : (c)
Q.5
Meiotic division of the secondary oocyte is completed ... .. [NEET 2020]
0%
a) After zygote formation
0%
b) At the time of fusion of a sperm with an ovum
0%
c) Prior to ovulation
0%
d) At the time of copulation
Explanation
Fertilization induces the completion of the meiotic division of the secondary oocyte. The second meiotic division is also unequal and results in the formation of a second polar body and a haploid ovum (ootid). The process of fusion of a sperm with an ovum is called fertilisation. Answer : (b)
Q.6
Match the following columns and select the correct option.
Column-I
Column-II
(a) Placenta
(i) Androgens
(b) Zona pellucida
(ii) Human Chorionic Gonadotropin (hCG)
(c) Bulbo-urethral
(iii) Layer of the ovum glands
(d) Leydig cells
(iv) Lubrication of the Penis
0%
a) a →iii; b →ii; c →iv; d →i;
0%
b) a →ii; b →iii; c →iv; d →i;
0%
c) a →iv; b →iii; c →i; d →ii;
0%
d) a →i; b →iv; c →ii; d →iii;
Explanation
Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc. Leydig cells, also known as interstitial cells of Leydig, are found adjacent to the seminiferous tubules in the testicle. They produce testosterone (androgens) in the presence of luteinizing hormone (LH). The zona pellucida is the extracellular coat of the mammalian oocyte. It acts as a selective filter before fertilization that can only be penetrated by sperm that have completed the acrosome reaction. The secretions of bulbourethral glands also helps in the lubrication of the penis. Answer : (b)
Q.7
Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle? [NEET 2020]
0%
a) Low concentration of LH
0%
b) Low concentration of FSH
0%
c) High concentration of Estrogen
0%
d) High concentration of Progesterone
Explanation
The secretion of gonadotropins (LH and FSH) increases gradually during the follicular phase, and stimulates follicular development as well as secretion of estrogens by the growing follicles. Both LH and FSH attain a peak level in the middle of cycle (about 14th day). Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge induces rupture of Graafian follicle and thereby the release of ovum (ovulation). Answer : (c)
Q.8
Which one is produced by mesoderm? ... ... [ JKMCEE 1994]
0%
a) Heart and notochord
0%
b) Heart and brain
0%
c) Spinal cord and notochord
0%
d) Brain and notochord
Explanation
Dermis of skin, connective tissue, muscles, skeleton, blood, heart,notochord, blood vessel, adrenal cortex, urino – genitals system except part of urinary bladder, lining of coelom, spleen and eyes are produced by mesoderm. Answer : (a)
Q.9
Which one is not character of haemochorial placenta ... ... [ Guj CET 2010 ]
0%
a) CO2 and excretory products pass from foetus to mother's body
0%
b) O2 and nutrients from mother's body enter the foetus
0%
c) Chorion villi are covered by blood sinuses of mother
0%
d) It protects foetus from mechanical shocks
Explanation
Characteristics of placenta : (i) Acts Nutritive organs – Food materials from the mother’s blood into the foetal blood through the placenta (ii) Acts as Digestive organ – Trophoblast of placenta digests proteins before passing them into the foetal blood. (iii) Acts as Respiratory organ – Oxygen diffuses from the maternal blood into the foetal blood through the placenta. Carbon dioxide diffuses from the foetal blood into the maternal blood also through the placenta for elimination by the mother’ lungs. Foetal haemoglobin has a greater affinity for oxygen than adult haemoglobin (iv) Acts as Excretory organ – Nitrogenous waste such as urea, pass form the foetal blood into the maternal blood via placenta for elimination by mother’s kidney (v) Acts as Endocrine organ – Placenta secretes some hormone such as estrogens, progesterone, human chorionic gonadotropin ( hCG), human placental lactogen ( hPL) chorionic thyrotropin, chorionic corticotrophin and relaxin. The hCG stimulates and maintains the corpus luteum to secrete progesterone until the end of pregnancy. The hPL stimulates the growth of the mammary glands during pregnancy. Relaxin facilitates parturition by softening the connective tissue of pubic symphysis (vi) Acts as Storage organ – The placenta stores glycogen for the foetus before liver is formed Answer : (d)
Q.10
Tunica albuginea is related to ... ... [ CMC 2002 ]
0%
a) Liver
0%
b) Lung
0%
c) Spleen
0%
d) Testes
Explanation
Tunic albuginea, is the actual covering of the testes. The covering is made up of dense bluish with fibrous or collangenous connective tissue Answer : (d)
Q.11
Which differentiates a sperm from egg ... ..
Basis for comparison
Human sperm
Human ovum
Size
Very small
Large in size
Mitochondria
In the middle piece, mitochondria form a spiral and are compactly arranged.
Mitochondria are scattered in the cytoplasm.
Cytoplasm
Present in the small amount
Present in large amount.
Nucleus
It is condensed with no nucleoplasm. The nucleus contains X or Y chromosome.
Ovum contains nucleoplasm, called as the germinal vesicle. The nucleus contains only X chromosome
Centrioles
Present.
Absent.
Produced in
Sperms are produced in the testes.
Ovum is produced in ovaries
Number of sperms formed
Four sperms are formed from one spermatogonium.
Only one ovum is formed from one oogonium
Differentiated into
Sperms are separated into head, neck, middle piece and tail.
Ovum is not externally separated into regions.
Movement
Can move.
Not able to move.
Surrounded by
Surrounded by plasma membrane only.
Ovum is surrounded by the egg envelopes.or Accessory membranes
0%
a) Cytoplasm is more abundant in sperm than in egg
0%
b) Accessory membranes are absent in sperm but present in egg
0%
c) Nucleus is clear in sperm and very compact in egg
0%
d) Mitochondria from a sheat in egg and diffused in sperm
Explanation
Basis for comparison
Human sperm
Human ovum
Size
Very small
Large in size
Mitochondria
In the middle piece, mitochondria form a spiral and are compactly arranged.
Mitochondria are scattered in the cytoplasm.
Cytoplasm
Present in the small amount
Present in large amount.
Nucleus
It is condensed with no nucleoplasm. The nucleus contains X or Y chromosome.
Ovum contains nucleoplasm, called as the germinal vesicle. The nucleus contains only X chromosome
Centrioles
Present.
Absent.
Produced in
Sperms are produced in the testes.
Ovum is produced in ovaries
Number of sperms formed
Four sperms are formed from one spermatogonium.
Only one ovum is formed from one oogonium
Differentiated into
Sperms are separated into head, neck, middle piece and tail.
Ovum is not externally separated into regions.
Movement
Can move.
Not able to move.
Surrounded by
Surrounded by plasma membrane only.
Ovum is surrounded by the egg envelopes.or Accessory membranes
Answer : (b)
Q.12
Membrane that gives protection to embryo from external shocks is ... .. [ MPPMT 1994 ]
0%
a) Amnion
0%
b) Allantois
0%
c) Chorion
0%
d) Placenta
Explanation
The amnion is a tough, thin membrane that surrounds a developing fetus in mammals, reptiles, and birds. amnion to expand and become the amniotic sac which serves to provide a protective environment for the developing embryo or fetus. Answer : (a)
Q.13
Acrosome occurs in the sperm in ... .... [ MPPMT 1998 ]
0%
a) tail part
0%
b) behind the nucleus
0%
c) middle piece
0%
d) tip
Explanation
The acrosome is an organelle that develops over the anterior half of the head in the spermatozoa (sperm cells) of many animals including humans Answer : (d)
Q.14
What is incorrect during amphimixis
0%
a) Swelling of sperm nucleus
0%
b) Initial movement of male nucleus along copulation path
0%
c) Establishment of achromatic spindle by proximal centriole
0%
d) Completion of second meiotic division if not occurred already
Explanation
Definition of amphimixis is the union or the fusion between the male and the female gametes in sexual reproduction Answer : (b)
Q.15
A cross section at mid point of the middle piece of human sperm will show ... ... [ AIIMS 2005 ]
0%
a) Centriole, mitochondria, 9+2 arrangement of microtubules
0%
b) Centriole and mitochondria
0%
c) Mitochondria and 9+2 arrangement of microtubules
0%
d) 9+2 arrangement of microtubules only
Explanation
Sperm consists of head, neck, a middle piece and a tail.When viewed under electron microscope, cross- section of a midpiece of sperm consists of- (i) core of the flagellum is composed of an axoneme surrounded by 9 dense fibres. (ii) axoneme consists of 2 singlet microtubules surrounded by 9 microtubule doublets. (iii) mitochondria is well placed for providing the ATP required for flagellar movement. Answer : (c)
Q.16
Amnion surrounds ... ... [ AMU 2000 ]
0%
a) Allantois
0%
b) Chorion
0%
c) Embryo
0%
d) Yolk sac
Explanation
The amnion is a tough, thin membrane that surrounds a developing fetus in mammals, reptiles, and birds. amnion to expand and become the amniotic sac which serves to provide a protective environment for the developing embryo or fetus. Answer : (c)
Q.17
Pregnancy begins with implantation of ... ... [ Wardha 2005 ]
0%
a) Embryo
0%
b) Fertilized ovum
0%
c) Blastopore
0%
d) Blastocyst
Explanation
A type of tissue called trophoblast develops from the fertilized egg and surrounds it. This trophoblast helps to implant the blastocyst(fertilized egg) once it arrives in the uterus. At this point, pregnancy has officially begun. Answer : (d)
Q.18
Match the columns and find the correct combination ... ... [ KCET 2008]
Column I
Column II
a) Oxytocin
p) Stimulates ovulation
b) Prolactin
q) Implantation and maintenance of pregnancy
c) Luteinising
r) Lactation after child birth
d) Progesterone
s) Uterine contraction during labour
- -
t) Reabsorption of warter by nephrons
0%
a) a → s, b → r, c → p, d → q
0%
b) a → t, b → r, c → p, d → s
0%
c) a → s, b → q, c → r, d → t
0%
d) a → t, b → p, c → s, d → r
Explanation
Oxytocin (Oxt) is a peptide hormone and neuropeptide. Oxytocin is released into the bloodstream as a hormone in response to stretching of the cervix and uterus during labor. a = s Prolactin (PRL), also known as lactotropin, is a protein best known for its role in enabling mammals (and birds), usually females, to produce milk. b = r Luteinizing hormone (LH) in synergy with follicle stimulating hormone (FSH) stimulates normal follicular growth and ovulation. c= p Progesterone belongs to a group of steroid hormones called progestogens. It is mainly secreted by the corpus luteum in the ovary during the second half of the menstrual cycle. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy. d= q Answer : (a)
Q.19
Sperm enters the egg from ... ... [ RPMT 2002 ]
0%
a) Animal pole
0%
b) Vegetal pole
0%
c) Micropyle
0%
d) Megapyle
Explanation
Sperm entry can occur anywhere in the animal hemisphere. Answer : (a)
Q.20
50 secondary oocytes in female and 50 secondary spermatocytes in male give rise to .... ... [MPPMT 1993]
0%
a) 50 ova and 100 sperms
0%
b) 100 ova and 200 sperms
0%
c) 200 ova and 50 sperms
0%
d) 100 ova and 100 sperms
Explanation
In the process of spermatogenesis single secondary spermatocyte produces two sperms thus 50 secondary spermatocytes will produce 100 sperms. In the process of oogenesis single secondary oocyte produces one ova and one polar body. Thus, 50 will produce 50 ovum. Answer : (a)
Q.21
Cleavage was first seen by ... ..
0%
a) Spallanzani
0%
b) Aristotle
0%
c) Hertwig
0%
d) Harvey
Explanation
An Italian biologist, Spallanzani worked on animal reproduction and in the year 1780, described the first two planes of cleavage in an egg. Answer : (a)
Q.22
In man the sperm released from the testis take the following route to reach the ureter ... ....
0%
a) Vasa efferentia, epididymis, vas deferens and urethra
0%
b) Vasa efferentia, Bidder's canal, nephrostome
0%
c) Vasa efferentia, collecting tubules and bidder canals
0%
d) Vasa efferentia, Bidder canal, uriniferous tubules and nephrostome
Explanation
The testes are where sperm are manufactured in the scrotum. The vasa efferentia (efferent ducts) connect the rete testis with the initial section of the epididymis. The epididymis is a tortuously coiled structure topping the testis, and it receives immature sperm from the testis and stores it for several days. When ejaculation occurs, sperm is forcefully expelled from the tail of the epididymis into the deferent duct. Sperm then travels through the deferent duct through up the spermatic cord into the pelvic cavity, over the ureter to the prostate behind the bladder. Here, the vas deferens joins with the seminal vesicle to form the ejaculatory duct, which passes through the prostate and empties into the urethra. When ejaculation occurs, rhythmic muscle movements propel the sperm forward Answer : (a)
Q.23
Ovulation occurs under the influence of high titre of ... ... [ AIIMS 1996 ]
0%
a) LH
0%
b) FSH
0%
c) Estrogen
0%
d) Progesterone
Explanation
LH surge is important because it initiates the beginning of ovulation and fertile period. Answer : (a)
Q.24
Cleavage differs from mitosis because ... ...
0%
a) In cleavage there is no growth phase
0%
b) In cleavage consumption of roman O2 increases
0%
c) In cleavage nucleus-cytoplasmic ratio increases
0%
d) All the above
Explanation
Cleavage
Mitosis
Cleavage occurs in the zygote, parthenogenetic egg
Mitosis occurs in most body cells
Size of blastomeres decreases as their number increases
Size of the daughter cells remain nearly contstar due to growth
The total mass of blastomeres decreases as their number increases
The total mass of daughter cells becomes more than that of parent cell
DNA synthesis occurs much faster to form chromosomes for new blastomeres
DNA synthesis occurs at the normal rate
Nuclear/cytoplasmic ratio increases as cleavage progresses
Nuclear/cytoplasmic ratio does not change
SOLUTION Answer : (d)
Q.25
Production of sperms from spermatids is ... ... [ AFMC 2003 ]
0%
a) Spermiogenesis
0%
b) Spermatogenesis
0%
c) Oogenesis
0%
d) Gametogenesis
Explanation
SOLUTION Production of sperms from spermatids is spermiogenesis. It is the last stage of spermatogenesis. It occurs in testis and begins at puberty. The spermatids are transformed into sperms by the process of metamorphosis. Sperms are also known as spermatozoa. After spermiogenesis, the sperm heads become embedded in the Sertoli cells, and are finally released from the seminiferous tubules by the process called spermiation. Answer : (a)
Q.26
Movement of sperm is by ... ... [ Odisha 2008 ]
0%
a) Head
0%
b) Acrosome
0%
c) Middle piece
0%
d) Tail/flagellum
Explanation
SOLUTION Sperm motility is produced through activation of the sperm flagellum, which core structure, the axoneme, resembles motile cilia Answer : (d)
Q.27
In human females, menstrual cycle ceases around 50 years of age. it is termed as ... ... [ HPPMT 2011 ]
0%
a) Menopause
0%
b) Menarche
0%
c) Diapause
0%
d) None of the above
Explanation
SOLUTION Menopause is the time that marks the end of your menstrual cycles. It's diagnosed after you've gone 12 months without a menstrual period. Menopause can happen at age 40s or 50s Answer : (a)
Q.28
Which one functions as endocrine gland after ovulation ... ... [ CBSE 2007 ]
0%
a) Stroma
0%
b) Vitelline membrane
0%
c) Germinal epithelium
0%
d) Graafian follicle
Explanation
SOLUTION During ovulation, the mature follicle or Graafian follicle bursts and the ovum is released. After ovulation, the granulosa cells and the interstitial cells form a mass of large and yellowish conical cells. This is named as Corpus luteum which serves as a temporary endocrine gland by releasing progesterone and estrogen. Answer : (d)
Q.29
Which layer of embryo is formed first ... ... [ CPMT 2007 ]
0%
a) Mesoderm
0%
b) Ectoderm
0%
c) Endoderm
0%
d) Both B and C
Explanation
Immediately after implantation, the inner cell mass (embryo) differentiates. The human foetus within the uterus into an outer layer called ectoderm and an inner layer called endoderm. A mesoderm soon appears between the ectoderm and the endoderm. Answer : (d)
Q.30
Menstrual cycle occurs in ... ... [ Wardha 2005 ]
0%
a) Human females
0%
b) Mammalian females
0%
c) Primate females
0%
d) All of above
Explanation
All female mammals have a menstrual cycle. Humans, primates and some other mammals (bats, African elephant shrews and certain tree shrews) have such a thick endometrial lining that part of it is being shed through the vagina. Answer : (d)
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page