Memory cells are stored in

(a) spleen

(b) lymph nodes

(c) both (a) and (b)

(d) a specialised area of brain tissue

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The highly pathogenic influenza A (H5NI) virus infects 
(a) poultry 
(b) ducks
(c) migratory birds
(d) all of these.

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Enteric fever is caused by
(a) Salmonella enteritidis
(b) S. typhi
(c) S. typhimurium
(d) none of the above

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Stem cells arise from

(a) bone marrow

(b) yolk sac

(c) foetal liver

(d) all the above.

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Ingestion of food and water contaminated with infective eggs is the primary route of infection for 
(a) Taenia solium
(b) Wuchereria bancrofti
(c) Trichinella sp.
(d) Ascaris lumbricoides

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The degree of pathogenicity of a microorganism is referred to as 
(a) virulence 
(b) prevalence 
(c) severity
(d) pathogenic efficacy

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The following hepatitis viruses are RNA except

(a) hepatitis B virus

(b) hepatitis A virus

(c) hepatitis G virus

(d) hepatitis E virus.

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Cocaine is a stimulant, which may cause addiction. It is an alkaloid obtained from
(a) Eucalyptus
(b) Erythroxylon
(c) Rauwolfia
(d) Papaver

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Which of the following is non-pathogenic bacteria of colon?
(a) Escherichia coli
(b) Balantidium coli
(c) Entamoeba coli
(d) Enterobius vermicularis

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Which of the following is a component of cell mediated immunity?
(a) B-cells
(b) α-cells
(c) T-cells
(d) Both (a) and (c)

Please attempt this question first.

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