A medical student is comparing oxygen-binding proteins. Which protein exhibits a quaternary level of organization involving four subunits and a prosthetic group?
Q1. A medical student is comparing oxygen-binding proteins. Which protein exhibits a quaternary level of organization involving four subunits and a prosthetic group?
Answer: Hemoglobin
Explanation: Hemoglobin is a quaternary protein consisting of four polypeptide chains. Myoglobin is a single-chain protein that only reaches the tertiary level.