RNA polymerase II differs from RNA polymerase I and III by having
A)fewer amino acids at the N-terminus.
B)additional amino acids at the N-terminus.
C)fewer amino acids at the C-terminus.
D)additional amino acids at the C-terminus.
E)individual amino acids,but all three RNA polymerases are the same size.

Question

Quizplus · Accepted Answer

RNA polymerase II is distinguished from RNA polymerase I and III by having additional amino acids at the C-terminus, known as the C-terminal domain (CTD). This domain is crucial for the processing of pre-mRNA into mature mRNA.

RNA Polymerase II Differs from RNA Polymerase I and III