Questions: Level of structure found in hemoglobin but not in insulin: A. Primary B. Secondary C. Tertiary D. Quaternary

Transcript text: Level of structure found in hemoglobin but not in insulin: A. Primary B. Secondary C. Tertiary D. Quaternary

Solution

Step 1: Understand the Question

The question asks for the level of structure found in hemoglobin but not in insulin. The options provided are:

Step 2: Review Protein Structure Levels

Proteins have four levels of structure:

Primary structure: The sequence of amino acids in the polypeptide chain.
Secondary structure: Local folding into structures such as alpha-helices and beta-sheets.
Tertiary structure: The overall three-dimensional shape of a single polypeptide chain.
Quaternary structure: The arrangement of multiple polypeptide chains into a functional protein complex.

Step 3: Compare Hemoglobin and Insulin Structures

Hemoglobin: A protein with quaternary structure, composed of four polypeptide chains (two alpha and two beta chains).
Insulin: A protein with primary, secondary, and tertiary structures, but it does not have a quaternary structure as it is composed of only two polypeptide chains linked by disulfide bonds.