Which Statement Is True

question 127

Multiple Choice

Which statement is true?

• A) There is little polymorphism at MHC loci in humans.
• B) Cytotoxic T cell receptors recognize antigenic fragments only when they are bound to class II MHC molecule.
• C) T-helper cells have a surface protein that binds to antigen‒class I MHC complexes.
• D) Cytotoxic T cells use a protein called CD8 to ensure binding to an MHC-antigen complex.
• E) T-helper cells bind to pathogens that display cell surface antigens.

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Definitions:

Tit For Tat

A strategy in game theory where a participant replicates an opponent's action, usually in the context of cooperative or retaliatory behavior.

Reciprocity

A social exchange principle where benefits are mutual, encouraging a culture of cooperative and equitable behavior.

Group Polarization

The phenomenon where discussions within a group lead to an exaggeration of the group's initial leanings, potentially resulting in more extreme positions.

Distress

A negative emotional state that arises when an individual perceives a situation as threatening or beyond their coping capabilities, often leading to discomfort or pain.