Question

In a double-stranded DNA molecule, one of the strands has the sequence 5-CCCATTCTA-3: Based on the sequence information above, is the following statement true or false: The 5′-terminal residue of the other chain is G.

a) True
b) False

Answer 1

The statement is false; the 5'-terminal residue of the complementary strand to 5'-CCCATTCTA-3' would be thymine (T), not guanine (G).

Step-by-step explanation:

The statement is false. Given a DNA strand with the sequence 5'-CCCATTCTA-3', the complementary strand would pair each cytosine (C) with guanine (G), each adenine (A) with thymine (T), and vice versa. Thus, the complementary strand would read 3'-GGGTAAGAT-5', and the 5'-terminal residue of the complementary strand would be thymine (T), not guanine (G).