Top 80+ Solved Sterilisation, Culture Media and Pure Culture Techniques MCQ Questions Answer
Q. Temperature used for hot air oven is
a. 100oC for 1 hour
b. 120oC for 1 hour
c. 160oC for 1 hour
d. 60oC for 1 hour
Q. Phenol co-efficient indicates
a. Efficiency of a disinfectant
b. Dilution of a disinfectant
c. Purity of a disinfectant
d. Quantity of a disinfectant
Q. This is an agar plate method and is commonly used for estimation of the number of bacteria in milk.
a. Standard Plate Count (SPC)
b. Spread plate
c. Lawn culture
d. Roll tube method
Q. A gram positive organism which producesswarming on culture medium is
a. Salmonella
b. Clostridium
c. Staphylococci
d. Proteus
Q. Enhancement of virulence in bacteria is known as
a. Pathogenicity
b. Attenuation
c. Exaltation
d. Toxigenicity
Q. For effective sterilization in an autoclavethe temperature obtained is
a. 50oC
b. 100oC
c. 120oC
d. 180oC
Q. By pasteurization
a. All the microorganisms can be removed
b. Only pathogenic forms can be removed
c. Only non-pathogenic forms can be removed
d. All of these are correct
Q. The temperature required for pasteurization is
a. Above 100oC
b. Below 100oC
c. 100oC
d. None of these
Q. In the medium other than nutrients, if any substance is used in excess, that medium is
a. Enriched medium
b. Special medium
c. Enrichment medium
d. None of these
Q. Example for indicator medium is
a. Nutrient Agar
b. Nutrient broth
c. Wilson and Blair
d. Czapeck-dox medium