Which of the following provides the free 3OH group for DNA p

Which of the following provides the free 3\'-OH group for DNA polymerase to fill in the ends of telomere DNA?

A. The end of the previous Okazaki fragment.

B. The RNA primers laid down by primase.

C. The RNA found in telomerase.

D. None of the above. The ends are filled in by RNA polymerase which does not require a free 3\'-OH group.

Solution

The Answer is B:The RNA primers laid down by primase provides the free 3\'-OH group for DNA plymerase to fill in the ends of telomer DNA.