511.
Ligase enzyme is used for
A
Denaturation of DNA
B
Splitting DNA into small bits
C
Joining bits of DNA
D
Digestion of lipids
Answer :
Joining bits of DNA
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512.
Circular and double stranded DNA occurs in
A
Golgibody
B
Mitochondria
C
Nucleus
D
Ctytoplasm
Answer :
Mitochondria
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513.
Polyribosomes are aggregates of
A
ribosomes and rRNA
B
only rRNA
C
peroxisomes
D
several ribosomes held together by string of mRNA
Answer :
several ribosomes held together by string of mRNA
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514.
Elementary particles of mitochondria are
A
F1 particles
B
Ribosomes
C
DNA
D
Lysosomes
Answer :
F1 particles
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515.
Electron microscope was invented by
A
Knoll and Ruska
B
Rudolph and Killiker
C
C. P. Swanson
D
None of the above
Answer :
Knoll and Ruska
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516.
The name protoplasm was given by
A
Hooke
B
A.K. Sharma
C
Schwann
D
Purkinje
Answer :
Purkinje
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517.
Procaryotic Ribosomes are 70 s, s refers to
A
Svedberg unit
B
Smallest unit
C
Smooth
D
Speed
Answer :
Svedberg unit
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518.
To study the living cells without staining which of the following microscopes can be used
A
SEM
B
Fluorescent
C
Phase contrast
D
TEM
Answer :
Phase contrast
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519.
Hammerling's experiments of Acetabularia involved exchanging
A
cytoplasm
B
nucleus
C
rhizoid and stalk
D
gametes
Answer :
rhizoid and stalk
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520.
Chlorophyll in chlorolasts is located in
A
Grana
B
Pyrenoid
C
Strome
D
Both grana and stroma
Answer :
Grana
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