What happens to DNA during cellular growth and repair?

What happens to DNA during cellular growth and repair?

• A. DNA is replicated to provide copies for new cells.
• B. DNA dissolves during growth.
• C. DNA is not copied during repair.
• D. DNA becomes protein during replication.

Answer: (A)

The ability to copy genetic information is what growth and maintenance rely on. During cellular growth, DNA replication creates complete copies of the genome so each new cell receives a full set of genetic instructions after division. This replication is largely semi-conservative: each new DNA molecule contains one original strand and one newly synthesized strand, ensuring fidelity while allowing the genome to be passed on. In repair, damaged DNA sequences are restored by using an intact template to reconstruct the correct sequence, effectively copying the needed information to fix the genome. So the main idea is that DNA is copied to provide accurate templates for new cells and to restore integrity when damage occurs. Dissolving DNA during growth isn’t accurate, since the genome must be preserved and copied. Saying DNA is not copied during repair is incorrect because repair often involves synthesizing DNA to replace damaged sections. Stating that DNA becomes protein during replication confuses replication with protein synthesis, which happens later via transcription and translation.

The ability to copy genetic information is what growth and maintenance rely on. During cellular growth, DNA replication creates complete copies of the genome so each new cell receives a full set of genetic instructions after division. This replication is largely semi-conservative: each new DNA molecule contains one original strand and one newly synthesized strand, ensuring fidelity while allowing the genome to be passed on. In repair, damaged DNA sequences are restored by using an intact template to reconstruct the correct sequence, effectively copying the needed information to fix the genome. So the main idea is that DNA is copied to provide accurate templates for new cells and to restore integrity when damage occurs.

Dissolving DNA during growth isn’t accurate, since the genome must be preserved and copied. Saying DNA is not copied during repair is incorrect because repair often involves synthesizing DNA to replace damaged sections. Stating that DNA becomes protein during replication confuses replication with protein synthesis, which happens later via transcription and translation.