The usual concentration of agar used in agar medium is:
A. 10%
B. 2%
C. 5%
D. 15%
Tyndallisation is carried out for:
A. One day
B. Two successive days
C. 60 minutes
D. Three successive days
Sunlight acts as sterilizing agent because:
A. Long wavelength
B. short wave lenght
C. Ozone
D. Heat
In penicillin allergy, penicillin acts as a:
A. Hapten
B. Carrier
C. Super antigen
D. Toxin
The anaphylaxis should be treated first with:
A. Epinephrine
B. Steroids
C. Anti histamines
D. Antibiotics
Dry heat destroys microorganisms by:
A. Lysis
B. Oxidation
C. Hydrolysis of DNA
D. Coagulation of proteins
The medium of choice for growing most fungi is:
A. Blood agar
B. Tissue culture
C. Sabouraud’s agar
D. Thioglycollate medium
Blood agar is:
A. Simple media
B. Transport media
C. Enriched media
D. Differential media
The component that sensitizes bacteria and virus to UV irradiation:
A. Lipids
B. Carbohydrates
C. Inorganic salts
D. Nucleic acids
Disinfection of the rooms can be done by using:
A. 20% phenol
B. High efficiency particle arrestors
C. 40% formaldehyde vapour
D. Chlorine gas
