Question

An organism living at an extremely hot place is likely to have a high GC content in its DNA. Give a reason to explain.

Answer 1

Organisms that live in very hot environments, such as thermophiles in hot springs, need their DNA to remain stable at high temperatures. A high GC content makes DNA more stable because G–C pairs have three hydrogen bonds, which are stronger and more heat-resistant than A–T pairs that have only two bonds.

When there are more GC pairs, the DNA double helix becomes harder to break or denature at high temperatures, helping it stay intact for proper functioning and replication.