Which part of an antibody molecule contains the variable regions of a heavy and light chain that fold into a groove that will interact directly with and bind to a specific antigen?
A)Fc end
B)Fab ends
C)heavy chains
D)light chains
E)disulfide bonds

Question

Quizplus · Accepted Answer

The Fab ends (fragment antigen binding) of an antibody molecule contain the variable regions of both the heavy and light chains. These regions fold into a groove that will directly interact with and bind to a specific antigen. The Fc end (fragment crystallizable) of the antibody molecule is responsible for interacting with cells and molecules of the immune system. The heavy and light chains are the two types of polypeptide chains that make up an antibody molecule. Disulfide bonds are covalent bonds between sulfur atoms that help stabilize the structure of the antibody molecule.

Which Part of an Antibody Molecule Contains the Variable Regions