The immediate type of hypersensitivity in which histamine doses not play a major role is______________?
(A) Urticaria
(B) Asthma
(C) Anaphylaxis
(D) Arthus reaction
Detergents used to disinfect dental instruments in the office kill bacteria by interfering with functional of the cell______________?
(A) wall
(B) nucleus
(C) membrane
(D) Capsule
Endotoxins differ from exotoxins in that endotoxins______________?
(A) are proteins
(B) are heat labile
(C) are highly antigenic
(D) activate complement by the alternate pathway
Rideal Walker test is used to determine the efficiency of the_____________?
(A) Disinfectant
(B) Moist heat sterilisation
(C) Antibiotics
(D) Dry heat sterilization
All are not true for cultivation of anaerobic organisms except_______________?
(A) Incubator
(B) anaerobic jar
(C) Refrigerator
(D) Centrifuge
Multiple drug resistance of bacteria depends on which of the following_______________?
(A) Resistance transfer factor (RTF)
(B) Colicigenic factor (Col)
(C) Fertility factor (F+)
(D) All of the above
The major antiseptic value of soap lies in its ability to_____________?
(A) Kill mircobes
(B) Remove microbes
(C) Inhibit microbial growth
(D) Dehydrate microbial cells
Which of the following antibacterial substance is present in eggs and saliva ?
(A) Lysozyme
(B) Secretozyme
(C) Albumin
(D) Isozyme
Most antibodies are produced in the________________?
(A) Heart and the liver
(B) Brain and the meninges
(C) Thymus and the appendix
(D) Spleen and the lymph nodes
The optimal time and temperature required for sterilization in an autoclave is___________________?
(A) 140°C x 2 hrs. x 10 lbs pr.
(B) 121°F x 15 mts. x 15 lbs pr.
(C) 121°F x 15 sec. x 15 lbs pr.
(D) 121°C 15 mts. x 15 lbs pr.