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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The following code codes for which of the amino acid respectively?
**AUG and GUG**
Anonymous Quiz
14%
Phenylalanine, tyrosine
46%
Methionine, valine
36%
Methionine, alanine
4%
Lysine, valine
1
Which of the following are non-sense codons?
Anonymous Quiz
12%
AUG
13%
GUG
60%
UAA
15%
UCU
1
The activation of amino acids requires energy.
Anonymous Quiz
84%
True
16%
False
👍2
tRNA has a _______________ structure.
Anonymous Quiz
7%
strand-like
6%
ball-like
83%
clover-leaf
5%
leaf-like
👍2
Transfer RNA is a single chain of ___________ nucleotides.
Anonymous Quiz
26%
340
33%
about 100
24%
about 80
18%
200
😢1
The ribosome of E.coli is made up of which two subunits?
Anonymous Quiz
23%
60S and 40S
19%
60S and 30S
13%
50S and 40S
45%
50S and 30S
👍2
The endoflagella is present in which class of bacteria?
Anonymous Quiz
18%
Spirilla
51%
Spirochetes
24%
Bacillus
7%
Coccus
🔥1
Spirochetes like other bacteria swim best in media of low viscosity.
Anonymous Quiz
74%
True
26%
False
👍1
The family Leptospiraceae are aerobes.
Anonymous Quiz
61%
True
39%
False
1
Which among the following are microaerophilic bacteria?
Anonymous Quiz
28%
Spirochaeta
26%
Cristispira
36%
Treponema
11%
Borrelia
🔥1
Which genus among the following has certain similarities to the genus Bdellovibrio?
Anonymous Quiz
23%
Azospirillum
27%
Oceanospirillum
22%
Campylobacter
28%
Vamprirovibrio
👍1
Pseudomonas maltophilia is a fluorescent species.
Anonymous Quiz
78%
True
22%
Flase
😱1
Pyocyanin, a blue water-soluble pigment is produced by which of the following pseudomonads?
Anonymous Quiz
6%
P.mallei
22%
P.syringae
49%
P.fluorescens
22%
P.aeruginosa
👍2
Which of the following are important plant pathogens?
Anonymous Quiz
30%
P. aeruginosa
27%
P.maltophilia
21%
P.syringae
21%
P.pseudomallei
😢1🤩1
What is the color of the pigment xanthomonadin?
Anonymous Quiz
16%
Blue
43%
Yellow
24%
Fluorescent
18%
Red
🤩1
Which of the following family of bacteria fix nitrogen under aerobic conditions?
Anonymous Quiz
16%
Pseudomonadaceae
47%
Azotobacteraceae
34%
Rhizobiaceae
3%
Methylcoccaceae
1
Agrobacterium also fixes atmospheric nitrogen.
Anonymous Quiz
71%
True
29%
False
🔥1
Methylococcus and Methylomonas are all _______________ methane-oxidizers.
Anonymous Quiz
16%
aerobic
35%
facultative
23%
obligate
25%
anaerobic
👍1
Which of the following have peritrichous flagella?
Anonymous Quiz
27%
Acetobacter
32%
Gluconobacter
26%
Agrobacteria
15%
Rhizobium
👍1
Bacteria belonging to the genus Legionella contains which of the following amino acid?
Anonymous Quiz
35%
Lysine
36%
Arginine
19%
Glycine
10%
Cysteine
👍1
Which of the following organism causes whooping cough in humans?
Anonymous Quiz
11%
E.coli
63%
Bordetella pertussis
21%
Francisella tularensis
5%
F.meningosepticum
1🔥1