No. of H-bonds between G-C is (IGKV- – CET 2024)

✅Explanation: In DNA, Guanine (G) and Cytosine (C) form three hydrogen bonds between them. This is one of the key features of DNA base pairing, with the other being that Adenine (A) and Thymine (T) form two hydrogen bonds. The specific base pairing between G-C (with three hydrogen bonds) and A-T (with two hydrogen bonds) ensures the fidelity of DNA replication and transcription.

🔑Key Points:
-The melting temperature (Tm) of DNA depends on the hydrogen bonding between base pairs.
-G-C pairs have three hydrogen bonds, while A-T pairs have only two hydrogen bonds.
-Therefore, DNA regions rich in G-C pairs have a higher Tm compared to regions rich in A-T pairs due to the stronger bonding.