a. human influenza virus
b. st louis encephalitis virus
c. coxiella burnetti
d. mycobacterium tuberculosis
64. most common species of pseudomonas causing intravenous cathrter related infections?
a. p. cepacia
b. p.areuginosa
c. p.maltiphila
d. p.mallei
65. most sensitive diagnostic test for dengue is?
a. Ig M elisa
b. cft
c. tissue culture
d. electron microscopy
answer:
66. a gardener has multiple vesicles on hand and multiple eruption s along the lymphatics. most common fungus responsible is?
a. sporothrix shenkii
b. cladosporium
c. histoplasma
d. candida
answer:
67. which is not a rna virus?
a. ebola
b. simian 40
c. rabies
d. vesicular stomatitis virus
answer:
68. true about prion is?
a. are virus coded
b. cause misfolding of proteins
c. cleave protein
d. defect in folding of proteins
answer:
69.
a. helps in transduction of bacteria
b. imparts toxigenicity to bacteria
c. can transper chromosomal gene
d.
answer:
70: girl from shimla presented to opd with fever malaise and axillary and inguinal lymphadenopathy.culture shows stalactite growth.causative organism is?
a. yersinia pestis
b. francisella
c. pseudomonas
d.
answer:
71.true about carbohydrate antigen are all except?
a. has low immunogenicity
b. memory response seen
c. causes polyclonal b cell stimulation
d. does not stimulate T cell
72.mechanism of action of pertusis toxin is?
a. adp ribosylation
b.
c.
d. acts through g alpha subunit
answer:
a. subtle amino acid changes due to allelic differences
b. changes in aa heavy and light chain in variable region
c. changes in heavy n light chain in constant region responsible for class and subtype
d. these are areas in antigen that bind specifically to antibody
answer:
74.true about hybridoma technique are all except ?
a. narmal activated b cellsmyeloma cells
b. myeloma cells selective mutation in salvage pathway, vigorous proliferation in hat medium
c. thymidine kinase and hgprt catalyse he salvage pathway
d. aminopterin a folic antagonist, inhibits de novo nucleotide synthesis
