Question

Which of the following is a correct pair?

• A. G = T
• B. C = G
• C. G = C
• D. A = T

Hint:

Base pairing in DNA follows strict rules: A pairs with T, and C pairs with G.

Answer 1

The Correct Option is D

Step 1: Recall base pairing in DNA.
In DNA, the nitrogenous bases follow specific pairing rules where Adenine (A) always pairs with Thymine (T), and Cytosine (C) always pairs with Guanine (G).
Step 2: Review the options.
- Option (A) G = T is incorrect because Guanine (G) pairs with Cytosine (C), not Thymine (T).
- Option (B) C = G is correct based on the base pairing rules.
- Option (C) G = C is correct, but it’s not the best answer to the question which asks for a “correct pair.”
- Option (D) A = T is the correct pairing in DNA as per the standard base pairing rules.
Step 3: Conclude.
The correct pair according to the base pairing rules is A = T, making option (D) the correct answer.
Final Answer: \[ \boxed{\text{A = T}} \]