Question

In DNA, the number of hydrogen bonds that hold each adenine-thymine base pair and each guanine-cytosine base pair, respectively, are _ _ _.

• A. 3 and 3
• B. 2 and 2
• C. 2 and 3
• D. 3 and 2

Hint:

Remember: A–T has 2 hydrogen bonds, while G–C has 3 hydrogen bondsThis makes G–C pairs more stable

Answer 1

The Correct Option is C

Step 1: Recall the base pairs.
In DNA, adenine pairs with thymine and guanine pairs with cytosine.

Step 2: Count the hydrogen bonds.
The A and T pair is joined by two hydrogen bonds. The G and C pair is joined by three hydrogen bonds.

Step 3: Answer.
\[ \boxed{2 \text{ and } 3} \]