Assertion : Senescence is the time when age a | vedclass

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

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

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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.

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.

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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.