Assertion : Senescence is time when age associated defects are manifested. Reason : Certain genes ma

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2.Human Reproduction

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Assertion : Senescence is the time when age associated defects are manifested.

Reason : Certain genes may be undergoing sequential switching on and off during one's life.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-2005)

Solution

According to programmed senescence theory of ageing, ageing is a result of switching on and off of certain genes. $B$ and $T-$ lymphocytes undergo programmed cell death called apoptosis.

Standard 12

Biology

$A$ : The morula passes through the phase of compaction, produces two major type of cells : the peripheral cells and the inner cell mass.
$R$ : The descendants of inner cell mass become the trophoblast cells

normal

The seminal fluid coagulates on ejaculation due to

normal

The events of the menstrual cycle are represented below. In which of the following option the level of $FSH$, $LH$ an progesterone is mentioned correctly

normal

Vitellogenesis occurs during the formation of

normal

The main function of tropho ectoderm in mammalian embryo is

normal

Assertion : Senescence is the time when age associated defects are manifested. Reason : Certain genes may be undergoing sequential switching on and off during one's life.

Solution

Similar Questions

$A$ : The morula passes through the phase of compaction, produces two major type of cells : the peripheral cells and the inner cell mass. $R$ : The descendants of inner cell mass become the trophoblast cells

The seminal fluid coagulates on ejaculation due to

The events of the menstrual cycle are represented below. In which of the following option the level of $FSH$, $LH$ an progesterone is mentioned correctly

Vitellogenesis occurs during the formation of

The main function of tropho ectoderm in mammalian embryo is

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Assertion : Senescence is the time when age associated defects are manifested.

Reason : Certain genes may be undergoing sequential switching on and off during one's life.

$A$ : The morula passes through the phase of compaction, produces two major type of cells : the peripheral cells and the inner cell mass.
$R$ : The descendants of inner cell mass become the trophoblast cells