Adding or Removing the 5' Cap on Messenger RNA Helps

question 149

Multiple Choice

Adding or removing the 5' cap on messenger RNA helps regulate gene activity at the level of translation because the 5 cap is necessary for:

• A)RNA splicing.
• B)3  polyadenylation.
• C)translational initiation.
• D)translational termination.

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Definitions:

Poly-A Tail

The string of adenine nucleotides added to the 3' end of a newly synthesized pre-mRNA molecule, playing a role in mRNA stability and translation.

mRNA Export

mRNA export is the process by which mRNA molecules are transported from the nucleus to the cytoplasm following transcription, preparing them for translation into proteins.

Nucleus

The membrane-bound organelle in eukaryotic cells that contains the cell's genetic material and controls its activities.

Peptidyl Transferase

An enzyme component of the ribosome that catalyzes the formation of peptide bonds between amino acids during the synthesis of proteins.