The Signal Peptide Is

question 41

Multiple Choice

The signal peptide is:

• A) found on precursors to plasma proteins.
• B) encoded nearer to the end than the 5' end of mRNA.
• C) synthesized after the ribosome binds to the rough ER.
• D) found nearest the carboxyl terminus of proteins.
• E) found nearest the amino terminus of soluble cytoplasmic proteins.

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Definitions:

Peripheral Membrane Protein

A protein associated with one of the surfaces of a biological membrane. Compare with integral membrane protein.

Receptor

A protein molecule that receives chemical signals from outside a cell, allowing cells to respond to various stimuli.

Signaling Molecule

Chemicals that transport information between cells in the body to coordinate responses.

Scaffold Proteins

Proteins that organize groups of intracellular signaling molecules into signaling complexes.