41.
What is true for plasmid?
A
Plasmids are widely used in gene transfer
B
These are found in virus
C
Plasmid contains gene for vital activities
D
These are main part of chromosome
Answer :
Plasmids are widely used in gene transfer
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42.
Stirred tank bioreactors have been designed for
A
addition of preservatives to the product
B
purification of the product
C
ensuring anaerobic conditions in the culture vessel
D
availability of oxygen throughout the process
Answer :
availability of oxygen throughout the process
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43.
The process of separation and purification of expressed protein before marketing is called:
A
Downstream processing
B
Bioprocessing
C
Postproduction processing
D
Upstream processing
Answer :
Downstream processing
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44.
The cutting of DNA at specific locations became possible with the discovery of
A
Probes
B
Selectable markers
C
Ligases
D
Restriction enzymes
Answer :
Restriction enzymes
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45.
In bacteria, plasmid is
A
extra - chromosomal material
B
main DNA
C
non-functional DNA
D
repetitive gene
Answer :
extra - chromosomal material
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46.
Which one of the following represents a palindromic sequence in DNA?
A
5' - GAATTC - 3'
3' - CTTAAG - 5'
B
5' - CCAATG - 3'
3' - GAATCC - 5'
C
5' - CATTAG - 3'
3' - GATAAC - 5'
D
5' - GATACC - 3'
3' - CCTAAG - 5'
Answer :
5' - GAATTC - 3'
3' - CTTAAG - 5'
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47.
Which of the following is not a feature of the plasmids?
A
Independent replication
B
Circular structure
C
Transferable
D
Single - stranded
Answer :
Single - stranded
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48.
Which one of the following techniques made it possible to genetically engineer living organism
A
Recombinant DNA techniques
B
X-ray diffraction
C
Heavier isotope labelling
D
Hybridization
Answer :
Recombinant DNA techniques
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49.
A gene whose expression helps to identify transformed cell is known as :
A
Vector
B
Plasmid
C
Structural gene
D
Selectable marker
Answer :
Selectable marker
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50.
In gel electrophoresis, separated DNA fragments can be visualized with the help of
A
Ethidium bromide in UV radiation
B
Acetocarmine in UV radiation
C
Ethidium bromide in infrared radiation
D
Acetocarmine in bright blue light
Answer :
Ethidium bromide in UV radiation
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