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Immunology Terminology Quiz

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Questions and Answers

What is the main characteristic of an immunogen?

Does not require a carrier molecule to induce an immune response

Induces an immune response in humoral cells only

Does not need recognition by B or T cells

Capable of inducing an immune response, whether humoral or cell mediated or both (correct)

What is the role of an epitope in an antigen?

Determines the molecular size of the antigen

Structure in the antigen recognized by the B or T cells (correct)

Is responsible for genetic foreignness

Initiates the immune response

Which property of an antigen refers to its genetic foreignness to the host?

Molecular size and stability

Mode of entry into the body

Foreignness and genetic composition (correct)

Chemical composition and complexity

What type of molecule is a hapten?

Low molecular weight molecule that must bind to a carrier molecule to trigger immune responses Signup and view all the answers

Why might a human body reject a transplanted pig's heart?

The pig's heart is genetically different from humans Signup and view all the answers

Which characteristic of an antigen affects whether it can provoke an immune reaction?

Genetic composition Signup and view all the answers

Which type of substances are generally NOT antigenic?

Pure lipids and nucleic acids Signup and view all the answers

Why are proteins considered to be the most immunogenic?

Due to their larger molecular size and complex structures Signup and view all the answers

What property of an antigen can affect its immunogenicity besides its chemical composition?

Antigen's stability in the body Signup and view all the answers

In what way does a glycoprotein differ from a pure protein that makes it more antigenic?

Glycoproteins have a more complex structure than pure proteins Signup and view all the answers

What type of molecules are considered weakly immunogenic or not immunogenic at all?

Molecules below 10,000 Dalton's Signup and view all the answers

Why do some high molecular weight substances lose their immunogenicity in the body?

They break up into smaller molecules once inside the body Signup and view all the answers