Multiple Choice Questions

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Assertion: Extra oxygen consumption in human, body is known as oxygen debt.

Reason: The extra oxygen is required by the body to oxidise the accumulated lactic acid produced during strenuous exercise.

  • 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.


A.

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

During strenuous exercise, the muscle does not get sufficient oxygen to meet its energy needs immediately. So, it contracts anaerobically and accumulates lactic acid. During recovery, the oxygen consumption of the muscle far exceeds than that in the resting state. The extra oxygen consumed during recovery is called oxygen debt of the muscle.


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Assertion: Now-a-days amniocentesis is banned.

Reason: Amniocentesis gives the information of any abnormality in the foetus and many other complications regarding pregnancy can be detected.

  • 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.


In humans at the end of first meiotic division, the male germ cells differentiate into the

  • primary spermatocytes

  • secondary spermatocytes

  • spermatids

  • spermatogonia


Assertion: In a regular medical examination of a small population, a 35 years old lady was found to have higher levels of oestrogens, progesterone in her blood.

Reason : The lady is 12 weeks pregnant.

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

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

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


What do A, B, C and D represent?

  • A- Infundibulum; B- Fertilization; C- Myometrium; D- Morula

  • A- Infundibulum; B- Fertilization; C- Endometrium; D- Blastocyst

  • A- Isthmus; B- Fertilization; C- Myometrium; D- Blastocyst

  • A- Isthmus; B- Fertilization; C- Endometrium; D- Morula


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Assertion : Parturition is induced by neural signal in maternal pituitary.

Reason : At the end of gestation period, the maternal pituitary release prolactin which causes uterine contractions.

  • 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


Acrosome reaction in sperm is triggered by

  • capacitation

  • release of lysin

  • influx of Ca++

  • release of fertilizin


Which of the following statements is correct

  • Monkey, apes and humans exhibit estrous cycle.

  • Urine is pale yellow and slightly alkaline.

  • Lots of enzymes are present in bile juice.

  • Ovulation in humans is spontaneous.


Which animal has the longest gestation period?

  • Shark

  • Walrus

  • Elephant

  • Dog


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Assertion: Corpus luteum is produced by Graafian follicle after ovulation.

Reason: It secretes estrogen which is necessary to maintain pregnancy.

  • 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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