Question

The complementary strand for the following single strand of DNA is 

• A. A
• B. B
• C. C
• D. D

Hint:

To find the complementary strand of a DNA sequence, pair A with T, and C with G, ensuring the strands run in opposite directions.

Answer 1

The Correct Option is A

Step 1: Understanding the complementary strand.
DNA strands are complementary, meaning each base on one strand pairs with a specific base on the other strand. The base pairs are adenine (A) with thymine (T), and cytosine (C) with guanine (G). The strands run in opposite directions (5' to 3' and 3' to 5').
Step 2: Analyzing the strand.
The given DNA strand is: 5' A T G C T 3'. Using complementary base pairing, the complementary strand will be: 3' T A C G A 5'. Thus, the correct answer is option (B).
Step 3: Conclusion.
The complementary strand for the given DNA sequence is 3' A T G C T 5'. The correct answer is (B).