An immunoglobulin (Ig)molecule, of whatever class, with regions symbolized as C or V, H or L, has a light chain made up of
A) one C region and one V region.
B) three C regions and one V region.
C) one H region and one L region.
D) three H regions and one L region.
E) two C regions and two V regions.

Question

Quizplus · Accepted Answer

A light chain in an immunoglobulin molecule is composed of one constant (C) region and one variable (V) region. Therefore, option A is the correct answer. Option B is incorrect because it describes the heavy chain instead of the light chain. Option C and D are also incorrect because they describe a single chain of the heavy chain instead of the light chain. Option E is incorrect because it describes multiple chains, which is not possible for a light chain.

An Immunoglobulin (Ig)molecule, of Whatever Class, with Regions Symbolized as C