Question Detail
Question
Which of the following is correct? a. Adenine forms two hydrogen bonds with guanine; thymine forms three hydrogen bonds with cytosine b. Adenine forms three hydrogen bonds with thymine; guanine forms two hydrogen bonds with cytosine c. Adenine forms three covalent bonds with thymine... d. Adenine forms two hydrogen bonds with thymine; guanine forms three hydrogen bonds with cytosine
Correct Answer
Option D is the correct answer.
Detailed Explanation
In DNA base pairing, Adenine (A) specifically pairs with Thymine (T) via two hydrogen bonds. Guanine (G) specifically pairs with Cytosine (C) via three hydrogen bonds. This specific pairing is crucial for the double helix structure and replication.
Hint
Remember 'A-T' has 2 bonds, 'G-C' has 3 bonds.