Coreceptor Molecules Are Required by T_C and T_H Cells So

question 43

Multiple Choice

Coreceptor molecules are required by T_C and T_H cells so that the TCR can stably bind to the MHC peptide presenting the antigen.All of the following are coreceptor molecules common to both T_C and T_H cells and their respective antigen-presenting cells EXCEPT

• A)CD2/LFA-3.
• B)CD28/B7.
• C)CD45R/CD22.
• D)LFA-1/ICAM-1.
• E)All of the answers are correct.

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Definitions:

Foraging Tactic

Strategies employed by animals to locate, capture, and consume food, which can vary widely among species based on ecological niches and food availability.

Optimal

The most favorable or desirable condition or outcome, especially from the standpoint of biology, where it often refers to the most efficient allocation of resources for survival and reproduction.

Fitness Payoff

The benefit gained in terms of reproductive success and survival by adopting a particular behavior or strategy.

Thief Phenotype

A behavioral characteristic exhibited by some individuals, where they steal resources (such as food or nesting materials) from other members of the same or different species.