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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Which of the following techniques is used to improve penicillin production?
Anonymous Quiz
23%
fed-batch fermentation
37%
submerged-culture technique
24%
continuous fermentation
16%
batch fermentation
Which of the following product acts as a substrate for the production of citric acid?
Anonymous Quiz
24%
molasses
48%
corn-steep liquor
18%
barn
10%
oyabeen meal
Which of the following enzymes is used to hydrolyze starch to dextrin?
Anonymous Quiz
22%
invertase
30%
pectinase
43%
amylase
5%
protease
Which of the following enzyme is used in the process of bating?
Anonymous Quiz
23%
invertase
45%
pectinase
19%
amylase
13%
protease
👍2
Paper, glass beads can be used to immobilize enzymes.
Anonymous Quiz
69%
True
31%
False
🔥3
Bacterial chromosome has the capacity to code for ____________ different proteins.
Anonymous Quiz
20%
900
36%
300
35%
1500
9%
3500
Which is the functional unit of inheritance?
Anonymous Quiz
28%
DNA
23%
Chromosome
49%
Gene
1%
RNA
Populations of cells descending from a single cell are known as ____________
Anonymous Quiz
10%
mutants
51%
clones
24%
wild-type cells
15%
parent cell
The replacement of a purine by a pyrimidine or vice versa is known as ____________
Anonymous Quiz
51%
tranversion
16%
transition
29%
base-pair substitution
4%
missense mutation
In nonsense mutation, the new mRNA codon specifies the same amino acid as that from the original codon.
Anonymous Quiz
59%
True
41%
False
Which of the following mutations result in frameshift mutation?
Anonymous Quiz
26%
missense mutation
19%
transition
22%
transversion
33%
insertion
Which of the following mutagen causes a break in the phosphodiester backbone of the nucleic acid?
Anonymous Quiz
40%
UV light
19%
X-rays
24%
Nitrous acid
17%
base analogs
👍1
Base analogs have the same hydrogen-bonding properties as the normal bases.
Anonymous Quiz
71%
True
29%
False
Acridine orange is which type of mutagen?
Anonymous Quiz
16%
base analog
32%
chemical compounds
46%
intercalating agents
6%
transposons
The transfer of genes from one cell to another by a bacteriophage is known as __________________
Anonymous Quiz
9%
Recombination
16%
Conjugation
55%
Transduction
20%
Transformation
Bacterial recombination causes transformation of the recipient cell to _______________
Anonymous Quiz
51%
donor cell
31%
merozygote
6%
zygote
11%
recipient cell
👍1
Transfer of genes between cells that are in physical contact with one another is known as transformation.
Anonymous Quiz
62%
True
38%
False
Which of the enzymes are used to cut the recipient DNA?
Anonymous Quiz
54%
endonuclease
31%
exonuclease
11%
ligases
4%
polymerase
The transfer of naked DNA from one cell to another is referred to as _______________
Anonymous Quiz
25%
Transduction
16%
Lysogeny
43%
Transformation
16%
Conjugation
👍1
The cell in which the F factor carries along with it some chromosomal genes are known as ____________
Anonymous Quiz
50%
F+ cell
24%
F— cell
22%
F’ cell
4%
F’’’ cell
The first demonstration of recombination in bacteria was achieved by _______________
Anonymous Quiz
44%
Lederberg and Tatum
21%
Luria and Delbruck
28%
Joshua and Lederberg
8%
Luria and Tatum