The Adaptive Immune System Uses Multiple Strategies to Generate Diversity

question 21

Multiple Choice

The adaptive immune system uses multiple strategies to generate diversity in our ability to mount responses to a wide array of infectious microorganisms. These strategies include the generation of diverse repertoires of B-cell and T-cell antigen receptors, as well as polymorphism of MHC genes. The polymorphism of MHC genes differs from the diversity of lymphocyte antigen receptors in that:

• A) It involves DNA rearrangements at multiple gene segments in the MHC locus.
• B) It requires different enzymes than the RAG1/RAG2 recombinase required for antigen receptor rearrangements.
• C) It results in a diverse repertoire of clonally distributed receptors on dendritic cells, rather than on lymphocytes.
• D) It creates diversity between individuals in the population rather than within a single individual.
• E) It does not contribute to the transplant rejection responses that occur after organ transplantation between unrelated individuals.

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Definitions:

Monopoly

A market structure characterized by a single seller, selling a unique product in the market with restrictions on the entry of new firms.

Law of Demand

An economic principle stating that as the price of a good or service increases, consumer demand for the good or service will decrease, and vice versa, holding all else constant.

Prices

The amount of money required to purchase goods or services, typically set by supply and demand dynamics in the market.

Scarce Resources

Refers to the limited availability of resources that are used for the production of goods and services.