1. Rancidity of stored foods is due to the
activity of
a) Toxigenic microbes
b) Proteolytic microbes
c) Saccharolytic microbes
d) Lipolytic microbes
2. Virion means
a) Infectious virus particles
b) Non-infectious particles
c) Incomplete particles
d) Defective virus particles
3. Virulence of the microorganisms can be
reduced by
a) Attenuation
b) A virulence
c) Inactivation
d) Freezing
4. The test used for detection of typhoid fever
a) WIDAL test
b) ELISA
c) Rosewaller test
d) Westernblotting
5. Bacteriophage capable of only lytic
growth is called
a) Temperate
b) Avirulent
c) Virulent
d) None of these
6. Diphtheria bacillus is otherwise known as
a) Fried-Landers bacillus
b) Kleb’s hofflers bacillus
c) Frchs bacillus
d) Koch’s bacillus
7. Acridine dyes are more effective against
a) Gram positive
b) Gram negative
c) Ricke Hsia
d) Mycoplasma
8. In bacteria pigment bearing structures are
a) Chloroplast
b) Protoplast
c) Sphaeroplast
d) Chromatophores
9. The procedure of differential staining of
bacteria was developed by
a) A.H. Gram
b) H.C. Gram
c) N.C. Gram
d) H.A. Gram
10. Intermediate group of pathogen between
bacteria and viruses which are intracellular
parasites are called
a) Mucoplasmas
b) Rickettsias
c) Prions
d) Virusoides