alleryStart learning →Which RNA is the smallest, and what does it do?
ARibosomal RNA, which aligns the message on the ribosome
BTransfer RNA, which regulates how the genes are expressed
CMicro RNA, which regulates how the genes are expressed
DMessenger RNA, which regulates how the genes are expressed
Answer & Solution
Correct answer: C. Micro RNA, which regulates how the genes are expressed
1. MicroRNAs are the smallest RNA molecules.
2. Their role involves the regulation of gene expression.
3. They do this by interfering with the expression of certain mRNA messages.
4. Transfer RNA is also small, usually 70 to 90 nucleotides, but it delivers amino acids rather than regulating genes.
5. Ribosomal RNA aligns the mRNA on the ribosome and catalyses peptide bond formation.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 3 "Biological Macromolecules", section 3.5 Nucleic Acids_
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