試題詳解

21. Why is there a need to produce Okazaki fragments on the lagging strand, but not on the leading strand of DNA?
(A)It is faster to make several smaller fragments than one larger fragment.
(B)It is more efficient to make several shorter strands than one longer strand of DNA.
(C)There is not enough DNA ligase for linking Okazaki fragments together if they were produced from both DNA strands.
(D) The two parental strands of DNA are antiparallel and DNA polymerase makes DNA in the 5’ to 3’ direction only.
(E)By having one leading strand and one lagging strand the cell will need less amounts of DNA polymerase.