What role do telomeres play during cell division?

What role do telomeres play during cell division?

• A. They assist in DNA replication
• B. They protect chromosome ends from deterioration
• C. They facilitate chromosome pairing
• D. They enhance gene expression

Answer: (B)

Telomeres serve a crucial role in maintaining the integrity of chromosomes during cell division by protecting the ends of chromosomes from deterioration. Composed of repetitive nucleotide sequences, telomeres act as protective caps that prevent the chromosome ends from fraying or getting fused together with other chromosomes, which could lead to genomic instability. During DNA replication, the enzymes responsible for copying DNA cannot fully replicate the ends of linear chromosomes, leading to the potential loss of important genetic information if not for telomeres. By safeguarding these ends, telomeres ensure that even with repeated rounds of cell division, vital genetic material is preserved, contributing to cellular longevity and stability. The other options are less relevant to the primary function of telomeres; while some may relate to broader genetic processes, they do not accurately reflect the specific protective role that telomeres play during the replication and division of cells.

Telomeres serve a crucial role in maintaining the integrity of chromosomes during cell division by protecting the ends of chromosomes from deterioration. Composed of repetitive nucleotide sequences, telomeres act as protective caps that prevent the chromosome ends from fraying or getting fused together with other chromosomes, which could lead to genomic instability.

During DNA replication, the enzymes responsible for copying DNA cannot fully replicate the ends of linear chromosomes, leading to the potential loss of important genetic information if not for telomeres. By safeguarding these ends, telomeres ensure that even with repeated rounds of cell division, vital genetic material is preserved, contributing to cellular longevity and stability.

The other options are less relevant to the primary function of telomeres; while some may relate to broader genetic processes, they do not accurately reflect the specific protective role that telomeres play during the replication and division of cells.