Question

The direction of DNA replication is from:

• A. amino acid end
• B. 3 end towards 5 end
• C. 5 end towards 3 end
• D. amino terminus to carboxy terminus

Answer 1

Answer: (C)

5 end towards 3 end

Answer 2

The synthesis of new DNA strand takes place by addition of DNA nucleotides to 3?OH group of the last nucleotide of the growing strand. Thus, the synthesis takes place in 5 $\to$ 3 direction.