Multiple Choice
Immunoglobulin/antibody classes are distinguished by:
8. Protein Function
Antibody
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What is the subunit structure of IgG, one of the 5 classes of antibodies produced by our immune system?
A
2 light chains and 2 heavy chains.
B
2 light chains, 2 heavy chains, and a J chain.
C
4 light chains, 4 heavy chains, and a J chain.
D
10 light chains, 6 heavy chains, and a J chain.
Verified step by step guidance1
Understand that IgG is one of the five classes of antibodies, also known as immunoglobulins, which play a crucial role in the immune response by identifying and neutralizing foreign objects like bacteria and viruses.
Recognize that antibodies are Y-shaped molecules composed of two main types of polypeptide chains: light chains and heavy chains.
Recall that the basic structure of an antibody consists of two identical light chains and two identical heavy chains, forming a tetrameric structure.
Note that the light chains are smaller polypeptides, while the heavy chains are larger and form the backbone of the antibody structure.
Identify that IgG specifically consists of two light chains and two heavy chains, without any additional components like a J chain, which is present in other antibody classes such as IgM.
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