If one side of a DNA molecule had the sequence 5' GCCATGACT 3', the complementary side that would be synthesized would read

5' CGGTACTGA 3'

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5' TAACGTCAG 3'

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3' TAACGTCAG 5'

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3' CGGTACTGA 5'

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Solution

The correct option is C 3' CGGTACTGA 5'
The complementary strand of DNA is anti-parallel, the nitrogen base pairing occurs as, A-T (two hydrogen bonds), G-C (three hydrogen bonds).
So, the correct answer is '3' CGGTACTGA 5'

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Given the DNA sequence 5’ CCTAGAA 3’, the complementary strand would read:

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