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Published on: 25/05/2021
QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks
Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test1.
'Restriction' in Restriction enzyme refers to
cleaving of phosphodiester bond in DNA by the enzyme
cutting of DNA at specific position only
prevention ofthe multiplication of bacteriophage in bacteria
all of the above
2.
Which of the given statement is correct in the context of observing DNA separated by agarose gel electrophoresis?
DNA can be seen in visible light
DNA can be seen without staining in visible light
Ethidium bromide stained DNA can be seen in visible light
Ethidium bromide stained DNA can be seen under exposure to UV light
3.
While isolating DNA from bacteria, which of the following enzymes is not used?
Lysozyme
Ribonuclease
Deoxyribonuclease
Protease
4.
Restriction enzyme Eco RI cuts the DNA between bases G and A only when sequence in DNA is
GATATC
GAATTC
GATTCC
GAACTT
5.
Who among the following was awarded the Nobel Prize for the development of PCR technique?
Herbert Boyer
Hargovind Khurana
Kary Mullis
Arthur Kornberg
6.
Which of the following should be chosen for best yield if one were to produce a recombinant protein in large amounts?
Laboratory flask of largest capacity
A stirred-tank bioreactor without in-lets and out-lets
A continuous culture system
Any of the above
7.
Which of the following bacteria is not a source of restriction endonuclease?
Haemophilus influenzae
Escherichia coli
Agrobacterium tumefaciens
Bacillus amyloli
8.
The role of DNA ligase in the construction of a recombinant DNS molecule is:
Formation of phosphodiester bond between two DNA fragments
Formation of hydrogen bonds between sticky ends of DNA fragments
Ligation of all purine and pyrimidine bases
None of the above
9.
Significance of 'heat-shock' method in bacterial transformations is to facilitate:
Binding of DNA to the cell wall
Uptake of DNA through membrane transport proteins
Uptake of DNA through transient pores in the bacterial cell wall
Expression of antibiotic resistance gene
1.
(c)
prevention ofthe multiplication of bacteriophage in bacteria
2.
(d)
Ethidium bromide stained DNA can be seen under exposure to UV light
3.
(a)
Lysozyme
4.
(b)
GAATTC
5.
(c)
Kary Mullis
6.
(c)
A continuous culture system
7.
(c)
Agrobacterium tumefaciens
8.
(a)
Formation of phosphodiester bond between two DNA fragments
9.
(c)
Uptake of DNA through transient pores in the bacterial cell wall
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