One hypothesis that proposes to explain senescence notes that cells that divide throughout the life course have shortened DNA sequences at the end of the chromosomes. This is referred to as the hypothesis.

Telomere

Explanation:

The correct answer would be telomere hypothesis.

The telomere hypothesis is the main hypothesis that links aging, otherwise known as senescence, to the shortening of telomeres. Telomeres are short DNA nucleotides found at the end of each chromosome of humans.

The hypothesis postulates that loss of telomeres in the vegetative cells of the body is primarily responsible for cell aging or senescence.

Hence, the correct answer would be the telomere hypothesis.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

i think its white blood cells

i hope this