Question Detail

BIO 101 BIO 101 Past Questions Objective Question
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Question

What is the base sequence of the DNA strand that would be complementary to the following single stranded DNA molecule 5' AGTTACCTGATCGTA 3'?
Options
A 5' TCAATGGACTAGCAT 3'
B 3' TCAATGGACTAGCAT 5'
Correct Answer
C 5' UCAAUGGACUAGCAU 3'
D 3' UCAAUGGACUAGCAU 5'
Correct Answer

Option B is the correct answer.

Detailed Explanation

Complementary DNA strands are antiparallel. The original strand is given 5' to 3'. The complementary strand must run 3' to 5' and follow base-pairing rules: A with T, and G with C. So, complement of A is T, G is C, T is A, T is A, A is T, etc. The correct complementary sequence running 3' to 5' is TCAATGGACTAGCAT.

Hint

Are the strands parallel or antiparallel? And what pairs with what?

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1132 of 2556
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