Question

What are the DNA complement base pairs for this strand of DNA? 5’ AGTTTA 3’

a) 3’ AGTTTA 5’
b) 3’ TCAAAT 5’
c) 5’ TCAAAT 3’
d) 5’ TAAACT 3’

Answer 1

The complementary DNA sequence to 5' AGTTTA 3' is 3' TCAAAT 5', according to the base pairing rules where A pairs with T and strands are antiparallel.

Step-by-step explanation:

The question is asking for the complementary DNA sequence to the given DNA strand with the sequence 5' AGTTTA 3'. To find the complementary strand, we apply the base pairing rules where adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). It is also important to remember that DNA strands are antiparallel, meaning the 5' to 3' direction of one strand is opposite to the 3' to 5' direction of the other.

Following these rules, we can deduce that the complementary base pairs for 5' AGTTTA 3' would be 3' TCAAAT 5', which matches with option b). Each A in the original strand pairs with a T in the complementary strand and vice versa.