Question

What would be the complementary strand for the following DNA sequence 5' GACATACCCAGACGGTATATTGA 3'

a) 5' CTGTATCCCAGACGGATATAACT 3'
b) 5' TCAATATACCGTCTGGGTATGTC 3'
c) 5' CTGTATGGGTCTGCCATATAACT 3'
d) 5' AGTTATATGGCAGACCCATACAG 3'
e) 5' TCAATATAGGCAGACCCTATGTC 3'

Answer 1

The correct answer will be option-C.

Step-by-step explanation:

The complementary base pairs are added by the rule given by the Chargaff which stated that A will bind to the T via double bond and G will bind to the C via a triple bond.

Thus the complementary sequence formed will be in the direction which is read from the 5' end to 3' end.

DNA strand- 5' GACATACCCAGACGGTATATTGA 3'

Complementary strand- 5' CTGTATGGGTCTGCCATATAACT 3'

Thus, option- C is the correct answer.