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UNIVERSITY/COLLEGE LEVEL
REVISION QUESTIONS 1
SUBJECT: MICROBIOLOGY
MCQS
1. False gram-negative reaction is due to:
a. Use of too old gram iodine
b. Use of excessive antibiotics
c. Smear being too thick
d. Staining with unfiltered crystal violet
e. Fixing the smear before drying
2. Microaerophilic organisms include:
a. Mycoplasma pneumoniae
b. Campylobacter coli
c. Brucella arbortus
d. Pseudomonas aeroginosa
e. Bacillus anthracis
3. Elevation of a colony on a solid media is NOT described as:
a. Punctiform
b. Raised
c. Lobate
d. Umbonate
e. Umbilicate
4. Genus micrococcus is:
a. Catalase negative
b. Facultative anaerobes
c. Saprophytes
d. Cocci in clusters
e. Strict aerobes
5. Unit of measurement of Treponema pertenue is:
a. Nanometer
b. 10-3 millimetre
c. 10-4 millimetre
d. 10-6 millimetre
e. 10-6 metre
6. H antigens of Escherichia coli are:
a. Protein in nature
b. Heat labile
c. Heat stable
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d. Lipopolysaccharide
e. Are used to name the sub groups of salmonella
7. Spirochete with regular coils include:
a. Borrelia vincenti
b. Borelia dutoni
c. Leptospira interogans
d. Treponema pallidum
e. Treponema pertenue
8. Hydrogen sulphide is produced by:
a. Salmonella typhi
b. Salmonella typhimurium
c. Citrobacter freundii
d. Escherichia coli
e. Shigella sonnei
9. Oxidase enzyme is produced by:
a. Alkaligenes faecalis
b. Campylobacter coli
c. Citrobacter freundii
d. Pseudomonas aeroginosa
e. Vibrio cholerae
10. Campylobacter and vibrio species are differentiated by:
a. Oxidase test
b. Sucrose fermentation
c. Motility
d. Growth on TCBS media
e. Gram stain
11. Micro-organisms obtaining carbon from carbon dioxide and nitrogen from ammonia are
called:
a. Heterotrophs
b. Chemotrophs
c. Phototrophs
d. Lithotrophs
e. Autotrophs
12. Which of the following is/are used as mordants?
a. Alberts iodine
b. Methanol
c. Ethanol
d. Grams iodine
e. Phenol
Page 2 of 9
UNIVERSITY/COLLEGE LEVEL
REVISION QUESTIONS 1
SUBJECT: MICROBIOLOGY
MCQS
1. False gram-negative reaction is due to:
a. Use of too old gram iodine
b. Use of excessive antibiotics
c. Smear being too thick
d. Staining with unfiltered crystal violet
e. Fixing the smear before drying
2. Microaerophilic organisms include:
a. Mycoplasma pneumoniae
b. Campylobacter coli
c. Brucella arbortus
d. Pseudomonas aeroginosa
e. Bacillus anthracis
3. Elevation of a colony on a solid media is NOT described as:
a. Punctiform
b. Raised
c. Lobate
d. Umbonate
e. Umbilicate
4. Genus micrococcus is:
a. Catalase negative
b. Facultative anaerobes
c. Saprophytes
d. Cocci in clusters
e. Strict aerobes
5. Unit of measurement of Treponema pertenue is:
a. Nanometer
b. 10-3 millimetre
c. 10-4 millimetre
d. 10-6 millimetre
e. 10-6 metre
6. H antigens of Escherichia coli are:
a. Protein in nature
b. Heat labile
c. Heat stable
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, Page 2 of 9
d. Lipopolysaccharide
e. Are used to name the sub groups of salmonella
7. Spirochete with regular coils include:
a. Borrelia vincenti
b. Borelia dutoni
c. Leptospira interogans
d. Treponema pallidum
e. Treponema pertenue
8. Hydrogen sulphide is produced by:
a. Salmonella typhi
b. Salmonella typhimurium
c. Citrobacter freundii
d. Escherichia coli
e. Shigella sonnei
9. Oxidase enzyme is produced by:
a. Alkaligenes faecalis
b. Campylobacter coli
c. Citrobacter freundii
d. Pseudomonas aeroginosa
e. Vibrio cholerae
10. Campylobacter and vibrio species are differentiated by:
a. Oxidase test
b. Sucrose fermentation
c. Motility
d. Growth on TCBS media
e. Gram stain
11. Micro-organisms obtaining carbon from carbon dioxide and nitrogen from ammonia are
called:
a. Heterotrophs
b. Chemotrophs
c. Phototrophs
d. Lithotrophs
e. Autotrophs
12. Which of the following is/are used as mordants?
a. Alberts iodine
b. Methanol
c. Ethanol
d. Grams iodine
e. Phenol
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