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 Multiple Choice QuestionsMultiple Choice Questions

111.

Assertion : Mammary glands are apocrine glands.

Reason : The distal part containing secretory granules break down and leaves as a secretion.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


112.

How many sperms are formed from a secondary
spermatocyte

  • 4

  • 8

  • 2

  • 1


113.

Grey crescent is the area

  • at the point of entry of sperm into ovum

  • just opposite to the site of entry of sperm into ovum

  • at the animal pole

  • at the vegetal pole.


114.

Assertion : Mammalian ova produces hyaluronidase.

Reason : The eggs of mammal are microlecithal and telolecithal.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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115.

Which of the following is true regarding sperm?

  • Fertilizin : for penetrating egg membrane

  • Hyalurodinase : for penetrating egg membrane

  • Acrosin : dissolves corona radiata

  • Capacitation : takes place in penis


116.

Assertion: In mammals the female secondary sexual characters are developed by gonadotropins.

Reason: Gonadotropins are secreted by graafian follicle.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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117.

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

  • centriole, mitochondria and 9 + 2 arrangement of microtubules

  • centriole and mitochondria

  • mitochondria and 9 + 2 arrangement of microtubules

  • 9 + 2 arrangement of microtubules only


A.

centriole, mitochondria and 9 + 2 arrangement of microtubules

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.


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118.

Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

  • Release of egg: 5th day

  • Endometrium regenerates: 5 - 10 days

  • Endometrium secretes nutrients for implantation : 11 - 18 days

  • Rise in progesterone level : 1 - 15 days


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119.

Both corpus luteum and macula lutea are

  • found in human ovaries

  • a source of hormones

  • characterized by a yellow colour

  • contributory in maintaining pregnancy


120.

The phase of menstrual cycle in humans that last for 7 - 8 days, is: 

  • follicular phase

  • ovulatory phase

  • luteal phase

  • menstruation


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