Question

part of a dna strand is shown below.
t-a-c-g-t-t
what is the complementary dna strand?
a-u-c-c-u-u
a-t-g-c-a-a
u-a-g-c-u-u
u-a-g-g-a-a

Explanation:

Step1: Record base pairing rules

In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

Step2: Pair each base

Given DNA strand: T - A - C - G - T - T

• T pairs with A
• A pairs with T
• C pairs with G
• G pairs with C
• T pairs with A
• T pairs with A

So the complementary strand is A - T - G - C - A - A.

Answer:

B. A-T-G-C-A-A (assuming the second option is labeled as B, as the options are: 1. A-U-C-C-U-U, 2. A-T-G-C-A-A, 3. U-A-G-C-U-U, 4. U-A-G-G-A-A)