Evaluation of Antimicrobial Chemical Agents

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Evaluation of Antimicrobial Chemical Agents

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
We observe increased growth in nutrient agar plates as concentration of chemical agent is decreased.
A
True
B
False
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Liquid water-soluble substances appropriately diluted are dispensed into sterile test tubes, to which are added a measured amount of the test organism and then this is transferred into tubes of sterile media.This method helps in determining .....
A
whether the inhibitory action is bactericidal
B
whether the inhibitory action is bacteristatic
C
decrease in the amount of growth
D
complete absence of growth
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is the mode of action of formaldehyde?
A
interference with glycolysis
B
shows oxidizing property
C
combines with vital nitrogen compounds
D
changes the permeability of cytoplasmic membrane
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Iodine kills the microorganisms by causing denaturation of proteins.
A
True
B
False
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following methods is used for determining the decrease in the amount of growth?
A
test done on agar medium plate
B
test done into an agar medium or broth
C
test done by transfering water-soluble substances to sterile media
D
by phenol-coefficient method
There are 5 questions to complete.