The processes carried out by RNA polymerases and DNA polymerases are in some ways very similar, but they also have striking differences, including which of the following?
a) RNA polymerases require a primer to start synthesis, whereas DNA polymerases do not.
b) RNA polymerases proofread and repair errors during transcription, whereas DNA polymerases do not.
c) RNA polymerases synthesize RNA in the 5' to 3' direction, whereas DNA polymerases synthesize DNA in the 3' to 5' direction.
d) DNA polymerases are involved in transcription, whereas RNA polymerases are involved in DNA replication.