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Quiz 3
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Q.1
Which hormone is produced in women during pregnancy ... ... [ HPPMT 2010 ]
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a) human chorionic gonadotropin ( hCG)
0%
b) Relaxin
0%
c) Human placental lactogen (hPL)
0%
d) All the above
Explanation
Answer : (d)
Q.2
Number of foetal extraembryonic membranes in humans is ... ... [ MPPMT 2002 ]
0%
a) 2
0%
b) 3
0%
c) 4
0%
d) 1
Explanation
our embryonic development parallels Mammals and birds and even reptiles produce four different kinds of extraembryonic membranes to protect the embryo they are amnion, yolk sac, allantois, and chorion Answer : (c)
Q.3
Testosterone is secreted by ... ... [ JKCMEE 2007 ]
0%
a) Sertoli cells
0%
b) Leydig/interstitial cells
0%
c) Seminiferous cells
0%
d) All the above
Explanation
Leydig cells, also known as interstitial cells of Leydig, are found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH) Answer : (b)
Q.4
Which layer of uterus undergoes cyclic changes during menstrual cycle ... ... [ HPPMT 2011 ]
0%
a) Myometrium
0%
b) Endometrium
0%
c) Perimetrium
0%
d) All the above
Explanation
Endometrium is the innermost layer of the uterine wall, which undergoes cyclic changes during different stages of the menstrual cycle. The main function of the endometrium is to provide sites for implantation and the development of placenta. Answer : (b)
Q.5
Release of oocytes / ova from ovary is ... ... [ MPPMT 1994 ]
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a) Gestation
0%
b) Ovulation
0%
c) Parturition
0%
d) Implantation
Explanation
Ovulation is a part of menstrual cycle. It occurs when an egg is released from ovary Answer : (b)
Q.6
LH surge occurs during phase of menstrual cycle. ..... [ Odisha 2007 ]
0%
a) Menstrual phase
0%
b) Beginning of proliferative phase
0%
c) Just before end of proliferation phase
0%
d) At the middle of the cycle
Explanation
There are three phases of your menstrual cycle: follicular phase, ovulatory phase, and luteal phase. In terms of the luteinizing hormone (LH) surge, the ovulatory phase is most important or at the middle of the cycle Answer : (d)
Q.7
Human eggs are ... ... [ CBSE 1991 ]
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a) Alecithal
0%
b) Microlecithal
0%
c) Mesolecithal
0%
d) Macrolecithal
Explanation
Human egg is almost free of yolk, therefore it is called microlecithal Answer : (a)
Q.8
Nonprimate mammals have ... ....
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a) Menstrual cycle
0%
b) Oestrous cycle
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c) Breeding seasons
0%
d) Non breeding seasons
Explanation
In non-primate mammals like cows, sheep, deer, dog, tiger, etc., such cyclical changes during reproduction are called oestrus cycle. It is a 21-day cycle which is marked by the recurring appearance of oestrus or heat. This is when ovulation occurs Answer : (b)
Q.9
Role of Leydig cells is ... ... [ CBSE 2012 ]
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a) Nourishment of sperms
0%
b) Provide motility to sperms
0%
c) Bring about maturation of sperms
0%
d) Synthesis of testosterone / Androgen
Explanation
Leydig cells release a class of hormones called androgens (19-carbon steroids). They secrete testosterone, androstenedione and dehydroepiandrosterone (DHEA), Answer : (d)
Q.10
Which one is correct ... ... [ manipal 2001 ]
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a) Meiosis I occurs in primary spermatocyte
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b) Meiosis I occurs in secondary spermatocyte
0%
c) Meiosis I takes place in spermatids
0%
d) Meiosis II occurs in spermatids
Explanation
The primary spermatocyte divides meiotically (Meiosis I) into two secondary spermatocytes Answer : (a)
Q.11
Accessory genital gland found only in males is ... ... [ KCET 2007 ]
0%
a) Cowper's gland
0%
b) Bartholin gland
0%
c) Perineal gland
0%
d) Gastric Glands
Explanation
Male accessory glands (MAG) in humans are the seminal vesicles, prostate gland, and the Cowper's glands (also called bulbourethral glands) Bartholin's glands are located in the superficial perineal pouch in females The perineal body (or central tendon of perineum) is a pyramidal fibromuscular mass in the middle line of the perineum at the junction between the urogenital triangle and the anal triangle. It is found in both males and females. Gastric Glands is not accessory genital gland Answer : (a)
Q.12
Find the correct options a) Testosterone influence male secondary sexual characters b) Gestation period in Rabbit is about 276 days c) Bulbourethral gland secretes a vaginal lubricant d) Placenta secretes estrogen
0%
a) b, c
0%
b) b, d
0%
c) a,c, d
0%
d) a, b, c
Explanation
Gestation period in Rabbit is about 32 days. Statement ‘b’ is wrong In response to sexual stimulation, the bulbourethral glands secrete an alkaline mucus-like fluid. This fluid neutralizes the acidity of the urine residue in the urethra, helps to neutralize the acidity of the vagina, and provides some lubrication for the tip of the penis during intercourse. Statement "c" is also correct Answer : (c)
Q.13
Placenta is formed in humans by ... ... [ MPPMT 2002 ]
0%
a) Amnion
0%
b) Allantois
0%
c) Chorion
0%
d) All the above
Explanation
Chorioallantoic placenta that forms from the chorion and allantois. Answer : (c)
Q.14
Phase of menstrual cycle in human that lasts for 7-8 days is ... ... [ AIIMS 2003]
0%
a) Follicular phase
0%
b) Ovulatory phase
0%
c) Luteal phase
0%
d) Menstruation
Explanation
The entire duration of a Menstrual cycle can be divided into four main phases: 1. Menstrual phase (From day 1 to 5) 2. Follicular phase (From day 5 to 13) 3. Ovulation phase (Day 14) 4. Luteal phase (From day 15 to 28) Answer : (a)
Q.15
Graafian follicles occur in ... ... [ Har PMT 2005 ]
0%
a) Ovary
0%
b) Testis
0%
c) Egg
0%
d) Sperm
Explanation
A Graafian follicle, or ovarian follicle, is found inside an ovary Answer : (a)
Q.16
Function of allantois is ... .. [ MPPMT 1999 ]
0%
a) Respiration
0%
b) Execration
0%
c) Nutrition and excretion
0%
d) Protection from shock
Explanation
The function of the allantois is to collect liquid waste from the embryo, as well as to exchange gases used by the embryo Answer : (c)
Q.17
Delivery of developed foetus is ... .. [ Odisha 2005 ]
0%
a) Ovulation
0%
b) Oviposition
0%
c) Parturition
0%
d) Abortion
Explanation
Delivery of developed foetus is scientifically called as-Parturition Answer : (c)
Q.18
Primary spermatocyte differs from spermatogonium in ... ... [ DPMT 2011 ]
0%
a) Size and volume
0%
b) Size of chromosomes
0%
c) DNA content
0%
d) Number of chromosomes
Explanation
Spermatogonia are undifferentiated male germ cells which are present in the basal compartment of seminiferous tubules. They are diploid cells which undergo mitosis to form diploid primary spermatocytes. Primary spermatocytes are intermediate cells which are formed by mitosis from spermatogonia and are present in adluminal compartment (towards inner region) of seminiferous tubule. Primary spermatocytes undergo meiosis to form halpoid secondary spermatocytes. Answer : (a)
Q.19
Due to deficiency of which hormone, bones become weak in females ... ... [ GUJ CET 2011 ]
0%
a) ACTH
0%
b) TSH
0%
c) Progesterone
0%
d) Estrogen
Explanation
Bones become weak in females may be due to a decrease in bone density. Estrogen works in conjunction with calcium, vitamin D, and other minerals to keep bones strong. Low estrogen can lead to infertility in women. Answer : (d)
Q.20
Tunica albuginea is the covering around ... ...
0%
a) Ovary
0%
b) Testis
0%
c) Kidney
0%
d) Heart
Explanation
The tunica albuginea is the fibrous covering of the testis. It is a dense blue-grey membrane, composed of bundles of white fibrous connective tissue, from which it derives its name albuginea, which interlace in every direction. Answer : (b)
Q.21
Chromosome number is halved during ... ... [ BHU 2003 ]
0%
a) Formation of first polar body
0%
b) Formation of second polar body
0%
c) Meiosis II
0%
d) Division of secondary oocyte
Explanation
In meiosis 1, it is said that chromosome numbers become halved in the two daughter cells. Answer : (a)
Q.22
A zygote is completely divided into two by a cleavage furrow. the cleavage type is ... ... [ MPPMT 1992 ]
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a) Equatorial
0%
b) Meroblastic
0%
c) Radial
0%
d) Holoblastic
Explanation
Holoblastic cleavage : characterized by cleavage planes that divide the whole egg into distinct and separate though coherent blastomeres holoblastic eggs holoblastic cleavage. Answer : (d)
Q.23
In telolecithal egg the yolk is found .... ... [ CBSE 1993 ]
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a) All over the egg
0%
b) On one side
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c) Both the sides
0%
d) Centre
Explanation
Telolecithal Eggs: The Yolk is found in excess and is in the form of large platelet like granules. The yolk is unequally distributed, more densely packed in the posterior half. Such eggs are found in sharks, amphibians, birds, cyclostomes, elasmorbranchs, ganoids and ling fishes. Answer : (b)
Q.24
First menstrual cycle is ... ...
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a) Parturition
0%
b) Menopause
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c) Menarche
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d) Implantation
Explanation
Menarche is the first menstrual cycle, or first menstrual bleeding, in female humans. From both social and medical perspectives, it is often considered the central event of female puberty, as it signals the possibility of fertility. Answer : (c)
Q.25
Vasa efferentia posses
0%
a) Peristalsis
0%
b) Secretory cells
0%
c) Ciliated cells
0%
d) Opening for seminal vesicles
Explanation
Vasa efferentia : Their lining epithelium is pseudostratified. It has large columnar ciliated cells and small nonciliated cells with endocytic activity, ciliated cells help in conducting sperms Answer : (c)
Q.26
Spermatogenesis involves ... ... [ MPPMT 2000 ]
Mitosis of the spermatogonia
16 days
Up to the primary spermatocytes Spermatogonia A & B
First meiosis
24 days
For the division of the primary spermatocytes to form secondary spermatocytes
Second meiosis
A few hours
For engendering the spermatids
Spermiogenesis
24 days
Up to the completed sperm cells
Total
~64 days
- -
0%
a) Mitosis
0%
b) Meiosis
0%
c) Metamorphosis
0%
d) Both A and B
Explanation
Mitosis of the spermatogonia
16 days
Up to the primary spermatocytes Spermatogonia A & B
First meiosis
24 days
For the division of the primary spermatocytes to form secondary spermatocytes
Second meiosis
A few hours
For engendering the spermatids
Spermiogenesis
24 days
Up to the completed sperm cells
Total
~64 days
- -
Spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis. The approximate 64 day cycle of the spermatogenesis can be subdivided into four phases that last differing lengths of time: Answer : (d)
Q.27
Twin develops from ... ... [ Har PMT 2005 ]
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a) Different zygotes
0%
b) Different ova
0%
c) Different sperms
0%
d) Same zygote
Explanation
Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ('identical'), meaning that they develop from one zygote Answer : (d)
Q.28
Failure of testes to descend into scrotum is .... ... [ BHU1998]
0%
a) Vasectomy
0%
b) Cryptorchidism
0%
c) Impotency
0%
d) Tubectomy
Explanation
Cryptorchidism Occurs when a boy is born with one or both testicles in the lower abdomen rather than the scrotum. Known also as undescended testicles Answer : (b)
Q.29
Acrosome of sperm contains ... ... [ MPPMT 2010]
0%
a) Hydrolytic enzymes
0%
b) DNA
0%
c) Fructose
0%
d) Mitochondria
Explanation
The acrosome is a unique membranous organelle located over the anterior part of the sperm nucleus that is highly conserved throughout evolution. This acidic vacuole contains a number of hydrolytic enzymes that, when secreted, help the sperm penetrate the egg's coats. Answer : (a)
Q.30
In spermatogenesis, a primary spermatocyte produce four similar sperms while in oogenesis a primary oocyte forms.. ... [ MPPMT 1991 ]
0%
a) Four similar ova
0%
b) Three large ova and one polar body
0%
c) Two large ova and two polar bodies
0%
d) One large ovum and 2-3 polar bodies
Explanation
Answer : (d)
0 h : 0 m : 1 s
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