1. Give the example of multicellular organisms.
a) Coccus
b) Spirillia
c) Fungi
d) Virus
2. In acid fast staining the counter stain is
a) Methylene blue
b) Alcohol
c) Crystal violet
d) Carbol Fuchsin
3. Pore size of membrane filter is
a) 0.45 micron
b) 0.54 micron
c) 0.35 micron
d) 0.25 micron
4. PVC is used as
a) Non-flexing material
b) Flexing material
c) Both
d) None of these
5. Musty flavor of bread is due to
a) Ethanol
b) Acetoin
c) Trichloroanisol
d) Trimethylamine
6. Give one example of acellular organism.
a) Prion
b) Cyanobacteria
c) Protozoa
d) Coccus
7. In acid fast staining, the primary dye is
(a) Methylene blue
(b) Alcohol
c) Crystal violet
d) Carbol Fuchsin
8. 3% hydrogen peroxide solution for 10 minutes is used as ……
a) High level disinfectant
b) Intermediate disinfectant
c) Low level disinfectant
d) None of these
9. Disinfectant used in aseptic room is ……
a) Sodium hypochloride
b) Sulphuric acid
c) Nitric acid
d) None of these
10. Garlic flavor of fish is due to
a) Ethanol
b) Dimethyltrisulphide
c) Acetoin
d) Lactic acid
11. Germs are discovered by ……
a) Robert Hooke
b) Roger Bacon
c) Aristotle
d) Fracastorius
12. Example of acid fast bacteria
a) Straphyllococcus aureus
b) E.coli
c) Mycobacterium tuberculosis
d) Salmonella typhi
13. Mechanism of action of Glutaraldehyde as disinfectant is ……
a) DNA strand breakage
b) cross linking of protein
c) membrane leakage
d) membrane damage
14. Example of skin disinfectant is ……
a) Chlorhexidine in sulphuric acid
b) Chlorhexidine in ethanol
c) Quats in ethanol
d) Quats in sulphuric acid
15. Hydrolytic rancidity of milk is due to
a) Lipase
b) Proteases
c) Peroxidases
d) Thiaminase
16. Leprosy bacillus discovered by
a) Emile Roux
b) Joseph Hansen
c) Alexander
d) Good Pasteur
17. IMVIC test is carried out for ……
a) Cocci
b) Algae
c) Enterobacteria
d) Protozoa
18. Mechanism of action of phenol is
a) DNA strand breakage
b) cross linking of protein
c) membrane leakage
d) membrane damage
19. Dust particle removed by HEPA filter is ……
a) 0.5 um
b) 0.2 um
c) 0.03 um
d) 0.3 um
20. Thiamine destruction of meat is due to
a) Lipase
b) Proteases
c) Peroxidases
d) Thiaminase
21. Mycology is the study of ……
a) Bacteria
b) Algae
c) Fungi
d) Virus
22. Methyi red test is for production of
a) indole
b) Acid
c) Citrate
d) Acetoin
23. Idophor antiseptic is
a) Peridex
b) Betadine
c) Hi Phene
d) Ioprep
24. ULPA is used to remove particle size
a) 0.03 pm
b) 0.12 um
c) 0.21 um
d) 0.3 um
25. Phycology is the study of ……
a) Algae
b) Fungi
c) Molds
d) Protozoa
26. Bad odour of vegetables is due to
a) Clostridium
b) Pseudomonas
c) Peroxidases
d) Rhizopus
27. Reagent used for indole test
a) Alpha naphtho!
b) Methyl red
c) Kovac reagent
d) KOH
28. MIC is determined in
a) Dextrose medium
b) Hinton Agar medium
c) Mueller Hinton Agar medium
d) B-5 medium
29. In vertical Laminar flow cabinet, air leave the working area via.
a) HEPA filter
b) Holes from the top
c) Holes in the base
d) None of these
30. Proteolysis of milk is caused by
a) Enterococci
b) Serratia
c) E.coli
d) Streptococcus
31. CFU stands for ……
a) cell forming unit
b) colony forming unit
c) cells per feet unit
d) colony per feet unit
32. Alpha naphthol and KOH is used for
a) Voges-Proskauer test
b) Indole test
c) Citrate test
d) Methyl red test
33. Type of Laminar flow Hoods used for protection from fumes and gases
a) Class-1
b) Class-II
c) Class-III
d) Class-IV
34. Serratia marcescens is the causative organism for fish spoilage of …..
a) Blue colour
b) Green colour
c) Red spot
d) Silver spot
35. Axonema is also known as …..
a) Cell wall
b) Bulk filament
c) Pili
d) Spinae
36. Alpha naphthol is also known as
a) Kovac reagent
b) Barritt’s A reagent
c) Barritt’s B Breagent
d) Van Ark’s reagent
37. Ditch test is used for
a) Bacteriostatic
b) Bactericidal
c) Both of these
d) None of these
38. Sulfide spoilage in canned food is due to ……
a) Bacillus
b) Penicillium
c) Desulfotomaculum
d) Mucor
39. Teichoic acid is absent in
a) Gram positive bacteria
b) Gram negative bacteria
c) Acid fast bacteria
d) Both gram positive and gram negative
40. Bromothymol blue indicator is used for
a) Citrate
b) Indole
c) Acetoin
d) Acid
41. Crown test is used for …..
a) Bacteriostatic
b) Bactericidal
c) Both of these
d) None of these
42. Green discolouration of cheese is due to ……
a) Candida
b) Pseudomonas
c) Proteus
d) Penicillium
43. Lithotrophs are ……
a) Organisms that use light energy
b) Organisms that use carbon energy
c) Organisms that use oxidize inorganic compounds
d) Organisms that use organic carbon
44. In MR-VP test, pink colour produced by
a ) E coli
b) Mycobacterium
c) Kiebsiella
d) Cocci
45. Sampling time for Chick Martin test is ……
a) 10 minutes
b) 20 minutes
c) 30 minutes
d) 5 minutes
46. Black rot of eggs is due to
a) Coliforms
b) Pseudomonas
c) Proteus
d) Rhizopus
47. Psychrophiles are grown in temperature between
a) 20 to 45 °C
b) 70 to 110 °C
c) -5 to 10 °C
d) -5 to 20 °C
48. PH of Simmons citrate Agar medium is.
a) 4.9
b) 3.9
(c 7.9
d) 6.9
49. Organism used in R-W test
a) S. aureus
b) S. typhi
c) E. coli
d) Proteus vulgaris
50. Redox potential in viscous emulsion is high because
a) High solubility of oxygen in fats
b) High solubility of oxygen in water
c) High solubility of carbon dioxide in fats
d) High solubility of carbon dioxide in water
51. Exponential phase is also known as
a) Log phase
b) Lag phase
c) Stationary phase
d) None of these
52. Hot air oven is example of
a) Moist heat
b) Dry heat
c) Both
d) None of these
53. Medium volume of AOAC test is
a) 10ml
b) 5 ml
c) 15 ml
d) 20 ml
54. Biological food contaminant is ……
a) Dust
b) Pesticides
c) Mushroom
d) Toxic metals
55. Cryopreservation is ….
a) Freezing in liquid nitrogen at -196 °C
b) Freezing in liquid nitrogen at -19 °C
c) Freezing in liquid nitrogen at -27 °C
d) Freezing in liquid nitrogen at 196 °C
56. Equipment used in moist heat sterilization is
a) Hot air oven
(b Autoclave
c)HEPA filter
d) None of these
57. Diluent for disinfectant use in Crown test
a) Yeast suspension
b) Water
c) Oil
d) Artificial sea water
58. Contaminant of thyroid tablet is ……
a) Coliforms
b) Clostridium tetani
c) Salmonella muenchen
d) Klebsiella
59. Contaminant of talcum powder is ….
a) Coliforms
b) Clostridium tetani
c) Salmonella muenchen
d) Klebsiella
60. Obligate anaerobes can grow in
a) Presence or absence of oxygen
b) Absent of oxygen
c) Presence of oxygen
d) None of these
