Multiple Choice Questions - NET, SET, MSc, PhD
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Regular and unique practice MCQs for Section B of CSIR, GATE, GAT-B, ICMR, and DBT. Helpful in various SET, NET, MSc, BSc, Biology exams.

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Vegetative cells are much more sensitive to heat than are spores.
Anonymous Quiz
71%
True
29%
False
The general pressure at which the autoclave is operated is ___________
Anonymous Quiz
8%
5 Psi
33%
20 Psi
53%
15 Psi
6%
40 Psi
Which of the following instruments is used to perform tyndallization?
Anonymous Quiz
18%
Autoclave
60%
Steam Arnold
13%
Gas oven
8%
Incubator
πŸ”₯1
Which of the following are resistant to desiccation?
Anonymous Quiz
11%
gonococci
49%
streptococci
23%
meningococci
17%
bacillus
πŸ‘1
Passage of water from a low solute concentration into the cell is referred to as ______________
Anonymous Quiz
17%
plasmoptysis
50%
plasmolysis
14%
isotonic
19%
hypertonic
Which material is used for the Berkefeld filter?
Anonymous Quiz
37%
diatomaceous earth
34%
asbestos pad
17%
porcelain
11%
sintered glass disks
Which of the following is not a chemical agent for microbial control?
Anonymous Quiz
42%
Radiations
24%
Antibiotics
20%
Antiseptics
14%
Germicide
πŸ‘2
The antimicrobial activity of phenolics is not reduced at which of the following conditions?
Anonymous Quiz
19%
acidic pH
38%
alkaline pH
34%
low temperatures
9%
presence of soap
Which of the following agents irreversibly oxidize and inactivate proteins with sulphydral groups?
Anonymous Quiz
24%
Alcohol
41%
Phenol
24%
Iodine
12%
Chlorine
Chloramines are more stable than than hypochlorites.
Anonymous Quiz
78%
True
22%
False
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
Phenol is considered as a chemotherapeutic agent.
Anonymous Quiz
70%
True
30%
False
Which was the first disease for which a chemotherapeutic agent was used?
Anonymous Quiz
21%
Syphilis
25%
Malaria
38%
Small pox
17%
AIDS
❀1
Sulfanilamide was synthesized by which of the following research scientists?
Anonymous Quiz
27%
Eisenberg
24%
Gelmo
37%
Ehrlich
12%
Domagk
πŸ‘1