What is one difference between transcription factors and miRNA (interference RNA)? (1 point)
a. miRNAs are mobile chemical messengers, while transcription factors are not.
b. Transcription factors work at halting transcription, while miRNAs work at destroying the products of transcription.
c. miRNAs bind to DNA, while transcription factors do not.
d. Transcription factors control eukaryotic gene regulation, while miRNAs control prokaryotic gene regulation.