Question

One strand of DNA has sequence of nucleotide 3 ‘ATTCGCTAT 5’ then other strand of DNA has

• A. 3 ‘TAAGCGATA 5’
• B. 3 ‘TAGCACGTA 5’
• C. 5 ‘TAGCACGTA 3’
• D. 5 ‘TAAGCGATA 3’

Answer 1

The correct option is D 5 ‘TAAGCGATA 3’

In a double stranded DNA, the sequence of nucleotides is complementary to each other. That is, A pair with T and G pair with C. So, the sequence of nucleotide for 3 ‘ATTCGCTAT 5’ will be 5’TAAGCGATA 3’.