Question

select the correct answer.

which form of genetic material initiates rna interference?

double-stranded dna
double-stranded rna
single-stranded dna
single-stranded rna

Explanation:

Identify the core biological process

The question asks which form of genetic material initiates RNA interference (RNAi). RNAi is a biological process in which RNA molecules inhibit gene expression or translation.

Determine the initiator molecule

RNA interference is naturally triggered by the presence of double-stranded RNA (dsRNA) inside a cell. This foreign or unusual structure is recognized by the enzyme Dicer, which cleaves it into short interfering RNAs (siRNAs) to begin the gene silencing pathway.

Evaluate the given options

• double-stranded DNA: Typically found in the nucleus; does not directly trigger RNAi.
• double-stranded RNA: The primary trigger that initiates the RNAi pathway.
• single-stranded DNA: Not the initiator of RNAi.
• single-stranded RNA: Standard messenger RNA (mRNA) is single-stranded and is the target of degradation, not the initiator of the pathway.

Answer:

• double-stranded DNA
• double-stranded RNA (Correct answer)
• single-stranded DNA
• single-stranded RNA