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51.

Each T-cell has a single species of T-cell receptor.(a) True(b) FalseThe question was posed to me by my college director while I was bunking the class.This question is from Immune Response in section Immune Response of Cell Biology

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The correct ANSWER is (a) True

The best I can EXPLAIN: Like B-cells, T-cells also undergo clonal selection. T-cells CONTAIN T-cell receptors that help them recognize and bind to certain infected cells or antigenic compounds. Each T-cell has a SINGLE species of T-cell receptors.
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52.

Innate immune responses are accompanied by inflammation.(a) True(b) FalseThis question was posed to me during an internship interview.This question is from The Immune Response in division Immune Response of Cell Biology

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Right choice is (a) True

To explain: Innate IMMUNE responses are USUALLY ACCOMPANIED by inflammation at the site of infection. At this site certain cells and PLASMA proteins leave the blood vessels and enter the affected tissues.
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53.

The phagocytes can recognize pathogens by means of _____________________(a) necrosis factor(b) complement activation(c) pattern recognition receptors(d) adhesion moleculesThe question was asked in final exam.This question is from The Immune Response topic in chapter Immune Response of Cell Biology

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The correct answer is (C) pattern RECOGNITION receptors

Easiest explanation: The pathogens MAKE their initial contact with phagocytic cells (dendrites and macrophages) which possess pattern recognition receptors (PRRs). The PRRs can recognize the highly CONSERVED macromolecules in bacteria and viruses.
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54.

A rare disease congenital agammaglobulinemia is caused due to abnormality in __________________(a) humoral antibody(b) cell-mediated immunity(c) acidic/alkaline pH(d) homeostasisThe question was asked during a job interview.My question is taken from The Immune Response in section Immune Response of Cell Biology

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Discussion