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
Which of the following is not true of boiling water_____________?
(A) It can kill hepatitis B virus
(B) Used for sterilizing surgical instruments
(C) Can kill mycobacterium tuberculosis
(D) Can kill vegetative bacterial cells
In penicillin allergy, penicillin acts as a_______________?
(A) Hapten
(B) Carrier
(C) Super antigen
(D) Toxin
Which of the following is not a koch’s postulate ?
(A) The bacteria should be able to be isolated from a diseased tissue
(B) When inoculated in experimental animals bacteria may or may not cause disease
(C) Pure cultures can be obtained
(D) Bacteria should be able to be isolated from the diseased tissue in the experimental animals
In patients with asthma due to an allergic cause the serum levels of which immunoglobulin increase____________________?
(A) IgD
(B) IgM
(C) IgA
(D) IgE
Type of receptor present on T-cells are__________________?
(A) Ig A
(B) Ig G
(C) Prostaglandins
(D) CD4
Hot air oven cannot be used for sterlisling___________________?
(A) Clothes
(B) Instruments
(C) Culture media
(D) Needles
Zero growth rate is observed during one of the phase of the bacterial growth curve______________?
(A) Lag
(B) Exponential growth
(C) Stationary phase
(D) Decline
Exotoxins are____________________?
(A) Lipid-polysaccharide complex
(B) Protein compound
(C) Lipoprotein
(D) None