This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following is not common to synthesis of both leading and lagging strands 
Select and explain. 
A. RNA primer is needed, B. Nucleoside monophosphates are added in 5' to 3' direction along the growing DNA chain, C. DNA polymerase III synthesizes DNA, D. DNA ligase repeatedly join the ends of DNA along the growing strands.
D: DNA ligase repeatedly join the ends of DNA along the growing strands.
Answer: D: DNA ligase repeatedly join the ends of DNA along the growing strands. 
Explanation: Option d occurs in lagging strand. Not in leading strand.