Which among the following is an example of an organic compound of mercury?
Anonymous Quiz
28%
Mercuric chloride
33%
Mercuric oxide
24%
Mercurochrome
14%
Ammoniated mercury
Which of the following is an acridine dye?
Anonymous Quiz
24%
crystal violet
41%
malachite green
25%
tryptoflavine
10%
brilliant green
Gonococci are inhibited by tryptoflavine in dilutions of ____________
Anonymous Quiz
19%
1:200,000
47%
1:300,000
27%
1:1,000,000
7%
1:10,000,000
We observe increased growth in nutrient agar plates as concentration of chemical agent is decreased.
Anonymous Quiz
73%
True
27%
False
Which of the following chemical agents lack penetrating power?
Anonymous Quiz
20%
Phenol
27%
Iodine
29%
Ethylene oxide
24%
Beta-propiolactone
Iodine kills the microorganisms by causing the denaturation of proteins.
Anonymous Quiz
74%
True
26%
False
Which of the following is not a characteristic of a chemotherapeutic agent?
Anonymous Quiz
17%
low toxicity for host cells
24%
high toxicity for the parasites
25%
less penetrating power
34%
does not affect the hostβs natural defense mechanism
π’3
Which was the first disease for which a chemotherapeutic agent was used?
Anonymous Quiz
21%
Syphilis
25%
Malaria
38%
Small pox
17%
AIDS
β€1
Sulfanilamide was synthesized by which of the following research scientists?
Anonymous Quiz
27%
Eisenberg
24%
Gelmo
37%
Ehrlich
12%
Domagk
π1
Sulfonamides and arsphenamine are similar in their specificity for a special group of organism.
Anonymous Quiz
79%
True
21%
False
π1
The antibiotic penicillin was discovered by which of the following researchers?
Anonymous Quiz
5%
Emmerich and Low
9%
Gratia and Dath
81%
Alexander Flemming
5%
Vuillemin
Bacterial cells grown in a medium exposed to high osmotic pressure, changes shape from rod-shaped to __________ shaped.
Anonymous Quiz
37%
spherical
23%
rod shaped
27%
irregular
13%
elongated
Structurally all penicillins have only beta-lactam present in them.
Anonymous Quiz
62%
True
38%
False
Which of the following does not affect the activity of penicillin?
Anonymous Quiz
19%
bile
35%
hydrochloric acid
26%
cysteine
20%
sodium hydroxide
Streptomyces orientalis produces which of the following antibiotics?
Anonymous Quiz
35%
Cephalosporins
29%
Cycloserine
20%
Bacitracin
15%
Vancomycin
Which of the following interferes with the regeneration of the monophosphate form of bactoprenol from the pyrophosphate form?
Anonymous Quiz
22%
Vancomycin
29%
Ampicillin
31%
Bacitracin
17%
Cephalosporins
Polymyxins inhibits the growth of the microbes by carrying out which of the following actions?
Anonymous Quiz
20%
inhibition of cell-wall synthesis
16%
damage to cytoplasmic membrane
55%
inhibition of nucleic acid and protein synthesis
9%
inhibition of specific enzyme systems
Streptomycin is produced by which of the following organisms?
Anonymous Quiz
19%
Stretomyces noursei
34%
Streptomyces nodosus
17%
Streptomyces fradiae
31%
Streptomyces griseus
Which of the following antibiotic have a sparing effect on the B12 in the diet?
Anonymous Quiz
23%
Streptomycin
31%
Tetracycline
21%
Anthramycin
25%
Chloramphenicol
β€1