One end of a polynucleotide has a(n) _____ terminus, and the other end has a(n) _____
terminus.
a. amino group, carboxyl group
b. ester linkage; ester linkage
c. amino group; 3′-Hydroxyl
d. carboxyl group; 5′-Phosphate
e. 5′-Phosphate; 3′-Hydroxyl