One strand of a DNA molecule has the base sequence 5′-ATAGGT-3′. The complementary base sequence on the other strand of DNA will be 3′- __________-5′.

• A. TGGATA
• B. TGGAUA
• C. UAUCCA
• D. ATAGGT
• E. TATCCA

Answer: (E)

Verified step by step guidance

1. Understand that DNA is composed of two strands that are complementary to each other, meaning that each base on one strand pairs with a specific base on the other strand.
2. Recall the base pairing rules for DNA: Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G).
3. Given the sequence 5′-ATAGGT-3′, identify the complementary bases for each nucleotide: A pairs with T, T pairs with A, G pairs with C, and so on.
4. Write the complementary sequence by replacing each base with its pair: A with T, T with A, G with C, and vice versa.
5. Reverse the order of the complementary sequence to match the 3′ to 5′ direction, resulting in the sequence 3′-TATCCA-5′.