Question

If the sequence of one strand of DNA is written as follows: 5' - ATGC ATGC ATGC ATGC ATGC - 3', write down the sequence of the complementary strand in 3' → 5' direction.

Hint:

Remember the base pairing rule: A-T and G-C for DNA.

Answer 1

Step 1: Recall complementary base pairing.
Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C).
Step 2: Write the complementary strand.
- A pairs with T, T pairs with A, G pairs with C, and C pairs with G.
Step 3: Complete the strand.
The complementary strand will read: 3' - TACG TACG TACG TACG TACG - 5'.
Final Answer: \[ \boxed{3' - TACG TACG TACG TACG TACG - 5'} \]