The Recognition of a Chemical Signal by a Receptor Protein

question 43

Multiple Choice

The recognition of a chemical signal by a receptor protein in the membrane is most similar to ____.

• A) mRNA specifying the sequence of amino acids in a polypeptide
• B) binding of a specific substrate to the active site of an enzyme
• C) turning on gene transcription
• D) allosteric regulation of proteins
• E) an enzyme requiring a specific optimum pH and temperature for activity

---

Definitions:

Electrons

Subatomic particles with a negative charge that orbit the nucleus of an atom.

Positive Charge

An electrical charge with more protons than electrons, resulting in a net surplus of positive electric charge.

Protons

Positively charged subatomic particles found within the nucleus of an atom.

Electrons

Subatomic particles with a negative charge, orbiting the nucleus of an atom.