Which of the following theories sees aging as a process whereby cells are assumed to have a limitation on the number of times they can reproduce to repair damage? a. wear-and-tear theory
b. cellular clock theory
c. activity theory
d. free radical theory

Option B, Cellular clock theory

Explanation:

The Cellular Clock Theory of Aging states that the older the cells get , the more they become incapable of reproducing or replicating. The telomeres (tip of the chromosomes) are DNA sequences which cap the chromosomes get smaller in size with time and eventually they hinder the cell division. As per a normal standard rate, a telomere replicates 70 to 80 times in its life span and then it stops replicating.

Hence, option B is correct

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

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