How Many Antigen-Binding Sites Are Present on an IgM Molecule

question 54

Multiple Choice

How many antigen-binding sites are present on an IgM molecule?

• A)2
• B)4
• C)10
• D)16
• E)25

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Definitions:

Axial Position

A spatial location in a molecule where substituents are perpendicular to the plane of a ring, such as in cyclohexane.

Bicyclic Structure

A chemical compound featuring two interconnected rings, which can vary in size and the atoms they contain.

Line-Angle Formula

A simplified representation of a molecule showing how atoms are connected; lines represent bonds, and vertices represent carbon atoms.

Chair Conformation

A stable, puckered ring structure of cyclohexane that minimizes steric hindrance and strain.