Identification of Bacteria
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a. Ethyl
alcohol
b. Methyl
alcohol
c. Acetone
d. A mixture of ethyl alcohol and
acetone
Production of
acetoin can be detected by which of the following tests?
a. Citrate
test
b. Voges-Proskauer test
c. Methyl
red test
d. Indole
test
The production of
sufficient acid by fermentation of glucose leads to decrease in pH such that pH
of the medium falls below 4.5. Which of the following test can detect it?
a. Indole
test
b. Methyl red test
c. Citrate
utilization test
d. Voges-Proskauer
test
Which of the
following inference(s) indicate(s) the ability of an organism to utilize
citrate as a sole source of carbon in Simmon's citrate medium?
a. Blue
colour
b. Appearance
of growth
c. Both (a) and (b)
d. None of
these
The organisms that
can be acid-fast stained is__________
a. Nocardia
b. Tubercle
bacilli
c. Lepra
bacilli
d. all of these
The primary stain
of Gram's method is__________
a. Safranin
b. Phenolpthalene
c. Crystal violet
d. Methyl
red
At what
concentration of sulphuric acid, Nocardia resists decolourization?
a. 0.5% sulphuric acid
b. 5%
sulphuric acid
c. 10%
sulphuric acid
d. 8% sulphuric
acid
The gram-negative
organisms is__________
a. Actinomyces
b. Bacillus
c. Clostridium
d. None of these
Catalase production
is negative in which of the following?
a. Streptococcus
b. Salmonella
c. Proteus
d. Staphylococcus
Which of the
following is a substitute for crystal violet used in gram-staining procedure?
a. Methylene blue
b. Bromocresol
green
c. Safranin
d. Phenolpthalene
What is the colour
of gram -postive bacteria on a gram staining?
a. Purple
b. Pink
c. Colourless
d. Green
What is the colour
of gram-negative bacteria on a gram staining?
a. Purple
b. Pink
c. Green
d. Colourless
Which of the
following is a primary stain for acid fast staining of mycobacteria?
a. Crystal
violet
b. Carbol fuchsin
c. Geimsa
d. Methylene
blue
The deinococci are
gram-positive cocci and rods that are distinctive in their unusually great
resistance to__________
a. radiation
b. desiccation
c. both (a) and (b)
d. extreme
temperatures
Which of the
following shows a positive urease test?
a. Proteus
b. Klebsiella
c. Both (a) and (b)
d. None of
these
Which of the
following(s) is/ are oxidase-positive bacteria?
a. Vibrio
b. Neisseria
c. Pseudomonas
d. All of these
What is the order
of reagents used in the Gram stain?
a. Crystal
violet, iodine, safranin, decolorizer
b. Crystal violet, iodine,
decolorizer, safranin
c. Safranin,
crystal violet, decolorizer, iodine
d. Crystal
violet, safranin, iodine, decolorizer
Gram staining was
developed accidentally in 1884 by__________
a. Alexander
Fleming
b. Hans Christian Gram
c. Joseph
Christian Gram
d. Robert
Gram
The process of Gram
staining is based on the ability of bacterial cell wall__________
a. To
retain the safranin dye
b. To retain the crystal violet dye
during solvent treatment.
c. To
retain part of both dyes
d. None of
above
Which of the
following organisms can be demonstrated with silver impregnation method?
a. Vibrios
b. Salmonella
c. Spirochaetes
d. Shigella
Which of the
following(s) show(s) positive results for phenylalanine deaminase test?
a. Providencia
b. Proteus
c. Morganella
d. All of these