Question

If a DNA strand contains the sequence 5ʹ-ATTCCGGATCGA-3ʹ, which of the following is the sequence of the complementary strand of DNA?

a) 3ʹ-TAAGGCCTAGCT-5ʹ
b) 3ʹ-TAAGGCCTATCGA-5ʹ
c) 3ʹ-UAACCGGAUCGA-5ʹ
d) 3ʹ-UAAUGGCCAUCGA-5ʹ

Answer 1

The complementary strand of DNA is 3ʹ-TAAGGCCATCGA-5ʹ.

Step-by-step explanation:

The complementary strand of DNA is formed by pairing each nucleotide with its complementary base. In DNA, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). Therefore, the complementary strand of 5ʹ-ATTCCGGATCGA-3ʹ is 3ʹ-TAAGGCCATCGA-5ʹ.