Question: The optimal time and temperature required for sterilization in an autoclave is___________________?

• 1. 140°C x 2 hrs. x 10 lbs pr.
• 2. 121°F x 15 mts. x 15 lbs pr.
• 3. 121°F x 15 sec. x 15 lbs pr.
• 4. 121°C 15 mts. x 15 lbs pr.

Question: Most antibodies are produced in the________________?

• 1. Heart and the liver
• 2. Brain and the meninges
• 3. Thymus and the appendix
• 4. Spleen and the lymph nodes

Question: Which of the following antibacterial substance is present in eggs and saliva ?

• 1. Lysozyme
• 2. Secretozyme
• 3. Albumin
• 4. Isozyme

Question: The major antiseptic value of soap lies in its ability to_____________?

• 1. Kill mircobes
• 2. Remove microbes
• 3. Inhibit microbial growth
• 4. Dehydrate microbial cells

Question: Multiple drug resistance of bacteria depends on which of the following_______________?

• 1. Resistance transfer factor (RTF)
• 2. Colicigenic factor (Col)
• 3. Fertility factor (F+)
• 4. All of the above

Question: All are not true for cultivation of anaerobic organisms except_______________?

• 1. Incubator
• 2. anaerobic jar
• 3. Refrigerator
• 4. Centrifuge

Question: Rideal Walker test is used to determine the efficiency of the_____________?

• 1. Disinfectant
• 2. Moist heat sterilisation
• 3. Antibiotics
• 4. Dry heat sterilization

Question: Sterilisation is______________?

• 1. Pathogens killed but spores are not affected
• 2. Only pathogenic micro-organisms killed
• 3. Non-pathogenic killed
• 4. All pathogenic and non-pathogenic microorganisms killed

Question: compared with autoclave, use of a dry heat over for sterilization has the following disadvantages______________?

• 1. Time-consuming
• 2. Less effective
• 3. Causes instruments to rust
• 4. Causes sharp instruments to dull

Question: Which of the following is not a feature of anaphylaxis ?

• 1. Delayed reaction
• 2. Immediate reaction
• 3. passive transfer by serum
• 4. None of the above