What is a key difference between siRNAs and microRNAs?

• A. siRNAs bind to ribosomes, while microRNAs bind to DNA.
• B. siRNAs enhance translation, while microRNAs inhibit it.
• C. siRNAs are double-stranded, while microRNAs are single-stranded.
• D. siRNAs are encoded in the genome, while microRNAs are not.

Answer: (C)