Question

1. The regions on an antigen that are not only used for identifying the antigen by...

1. The regions on an antigen that are not only used for identifying the antigen by the immune system, but are also what antibodies bind to.

2. A molecule that is considered foreign to the body, but is too small to elicit an immune response.

3. Some that enhances phagocytosis.

4. A protein that is produced in response to an antigen and has the ability to specifically bind to that antigen.

A. Epitope (antigen determinants)

B. Paratope (antigen binding site)

C. Hapten

D. Antibody

E. Opsonization

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Answer #1

1 - B : Paratope ( antigen binding site )

Explanation : it is a part of antibody which recognize antigen and are also antigen binding site for antibody.

2 - C : Hapten

Explanation : hapten is essentialy incomplete antigen . it ellicit immune response only when attached to large carrier such as protein as carrier itself will not ellicit the immune response.

3 - E : Opsonization

Explanation : opsonin is a molecule which enhances the phagocytosis.

4 - D : antibody

Explanation : protein calles immunoglobulin a , protective protein produced in response to foreign body called antigen .

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