One of the strands of a double-helix DNA has the following base sequence: 5' CGGTTAGCA 3'. Identify the complementary base sequence of this strand.
A) 3'GCCAATCGT 5'
B) 5TAACCGATG 3'
C) 5'GCCTTACGA 3'
D) 3TAAGGGAGG 5'

Question

Quizplus · Accepted Answer

The complementary base sequence is determined by the base-pairing rules: Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G). The sequence must also be antiparallel, meaning if one strand is 5' to 3', the complementary strand must be 3' to 5'. Therefore, the correct complementary sequence to 5' CGGTTAGCA 3' is 3' GCCAATCGT 5'.

One of the Strands of a Double-Helix DNA Has the Following