Test Your Knowledge - Free MCQ PRACTICE
MICROBIOLOGY
by Dr K Chaudhry
BIOCHEMISTRY
BIOLOGY
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ENT
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DRIVINGTEST
A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. Area of lysis on a bacterial lawn culture produced by a phage is known as
A. pock
B. plaque
C. pox
D. all of these

2. What is the average incubation period for development of AIDS?
A. One year
B. Five years
C. Ten years
D. Twenty years

3. Agglutination test for Brucella mainly identifies which class of antibodies?
A. IgG
B. IgM
C. IgA
D. IgE

4. Giemsa stained smear of epithelial cells obtained from a newborn with hepatosplenomegaly is shown below. What is the most likely cause of this congenital infection?
A. CMV
B. Rubella
C. HIV
D. Ebstein-Barr virus

5. Which of the following organism is found at the initial stages in the batter of Idli?
A. Leuconostoc mesentroides
B. Aspergillus niger
C. Bacillus natio
D. None of these

6. The bacteria involved in the production of dental caries is/are
A. Streptococcus mutans
B. S sanguis
C. Both (a) and (b)
D. Streptococcus pyogenes

7. Which of the following articles can be sterilized in an autoclave?
A. Gloves
B. Culture media
C. Dressing material
D. All of these

8. Which of the following structures is the smallest?
A. Viriod
B. Hydrogen atom
C. Bacterium
D. Mitochondrion

9. Parsnip like odour and taste in beer is caused by
A. Flavobacterium proteus
B. Zygomonas anaeroium
C. Lactobacillus patorianus
D. S. carlsbergensis

10. The commonest bacterial infection in HIV disease is/are
A. mycobacterial infection
B. salmonella infection
C. bartonella infection
D. all of these

11. Which of the following algal divisions is characterized by possession of chlorophylls A and B, starch as the energy storage material, cellulosic cell walls and live in freshwater and marine habitats?
A. Chlorophyta
B. Chrysophyta
C. Phaeophyta
D. Pyrrophyta

12. Reduction is the
A. loss of proton
B. gain of electron
C. loss of electron
D. gain of protons

13. The disease(s) caused by genus Orthopoxvirus is/are
A. Vaccinia
B. Smallpox
C. Cowpox
D. All of these

14. Abnormal fermentation of cabbage may result in a cheese like odour caused by
A. propionic acid
B. butyric acid
C. caprioc acid and Valeric acid
D. all of these

15. The mutation which will not affect the length of a protein is,
A. nonsense mutation
B. missense mutation
C. frameshift mutation
D. all of these

16. Which of the following is correct for isoantigens?
A. They are antigens found in all members of different species
B. They are antigens found in some members of a species
C. They are antigens found in all members of a species
D. They are antigens found in some members of different species

17. Which of the following is considered the most unifying concept in biology?
A. Taxonomy
B. Anatomy
C. Genetics
D. Evolution

18. Intracellular enzymes
A. synthesize cellular material only
B. synthesize cellular material and perform catabolic reaction
C. synthesize cellular material and perform anabolic reaction
D. only provide energy to the cell

19. Water activity can act as
A. an intrinsic factor determining the likelihood of microbial proliferation
B. a processing factor
C. an extrinsic factor
D. all of the above

20. An elderly male presents 2 months after renal transplantation with nephropathy. Which of the following can be a viral etiological agent?
A. Polyoma virus BK
B. Human herpes virus type 6
C. Hepatitis C
D. Human papilloma virus, high risk types

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