11.2 Antibody

1. Describe the general structure of antibodies.

2. State the classes of antibodies based on their structure.

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​11.2 Antibody

Multiple Choice

The antibody is defined as a ____ secreted by plasma cells that bind to a particular antigen.

• carbohydrate

• protein

• nucleotide

• enzyme

Multiple Choice

'Ig' in immunity stands for

• Instagram

• Immunoglobulin

• I guess

• Infinite group

Fill in the Blanks

Antibody structure is

-shaped.

Multiple Choice

Each Y-shaped antibody is made up of:

• Four heavy and two light chains.

• Two heavy and four light chains.

• Two heavy and three light chains.

• Two heavy and two light chains.

Fill in the Blanks

Antibodies consist of four polypeptide chains which are linked together by a

bond.

Multiple Choice

Antibodies have a Y-shaped structure consisting of heavy and light chains. Which part of the antibody binds to the antigen?

• 1 and 2

• 1 and 3

• 1, 2 and 3

• 2 only

Drag and Drop

​

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is found at ​

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, the ​

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the sequence varies extensively from one antibody to another. The regions includes the ends of ​

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.

Drag these tiles and drop them in the correct blank above

Antigen binding site

variable region

amino acid

heavy and light chains

Multiple Choice

The most common antibody in the human body is _____.

• IgG

• IgM

• IgA

• IgD

• IgE

Multiple Choice

Which of the following is FALSE about antibodies?

• They are Y-shaped proteins.

• They are made by the immune system.

• They can attack any antigen that enters the body.

• They remain in the bloodstream for a long time after they are produced.