SCID Is Defined by a Lack of Functional B and T

question 65

Multiple Choice

SCID is defined by a lack of functional B and T cells which eliminates protection by humoral and cell-mediated immunity. Which of the following is true?

• A) A genetic defect disrupts the development of the lymphocytic cell lines.
• B) A genetic mutation renders the individual incapable of removing a toxic DNA metabolite from lymphocytes, which ultimately destroys them.
• C) Genes coding for B and T cell receptors are mutated so the cells are incapable of binding antigens.
• D) Genes that code for interleukin receptors are mutated so the individual's B and T cells do not receive the activation signals, rendering them useless.
• E) All of the choices describe cases of SCID.

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Definitions:

Conjunctive Task

A type of group task in which the group's success depends on the performance of the least proficient member.

Reward Allocation Norm

The set of principles or guidelines that govern how rewards, such as bonuses or recognition, are distributed among members of a group or an organization.

Reciprocity

A social norm of responding to a positive action with another positive action, rewarding kind actions as a way of ensuring mutual benefit or cooperation.

Status Hierarchy

An organizational or social system in which individuals or groups are ranked one above the other according to status or authority, influencing interactions and distribution of resources.