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Q. No.The DNA fragments separated on agar gel by electrophoresis can be visualised:
1.
without staining in the visible light
2.
without staining on exposure to UV light
3.
after staining with polyethylene glycol followed by exposure to IR radiation
4.
after staining with ethidium bromide followed by exposure to UV radiation
Subtopic: Separation and Isolation of DNA fragments |
94%
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Tetracycline resistance gene in the vector pBR322 carries the recognition sequence for:
1. PstI
2. PvuII
3. BamH I
4. EcoR I
1. PstI
2. PvuII
3. BamH I
4. EcoR I
Subtopic: Cloning Vector |
88%
From NCERT
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If an enzyme catalyses the removal of nucleotides from the ends of DNA, then it should be called as:
1. endonuclease
2. exonuclease
3 ligase
4. reverse transcriptase
Subtopic: Restriction Enzymes: Historical Background | Tools |
91%
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The number of times the recognition sequence of EcoRI is expected to appear in a dsDNA of 10,000 bp length will be:
1. 1
2. 2
3. 4
4. 8
1. 1
2. 2
3. 4
4. 8
Subtopic: Restriction Enzymes - Main Enzymes |
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A plasmid has a single recognition sequence for EcoRI. When cut with this enzyme, the number of resultant fragments will be:
1. 1
2. 2
3. 3
4. 4
Subtopic: Cloning Vector |
From NCERT
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The most critical requirement for any DNA molecule to be able to act as a cloning vector during rDNA procedures will be:
1. Ori
2. MCS
3. More than one selectable marker
4. A silent promoter
1. Ori
2. MCS
3. More than one selectable marker
4. A silent promoter
Subtopic: Cloning Vector |
88%
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Given below are four statements pertaining to the separation of DNA fragments using Gel electrophoresis. Identify the correct statements:
Choose the correct answer from the options given below:
1. Only (c) and (d)
2. Only (a) and (c)
3. Only (b) and (c)
4. Only (a) and (b)
| a: | DNA fragments are negatively charged molecules and can be separated by forcing them to move towards the anode under an electric field through a medium/matrix. |
| b: | The separation of DNA fragments is possible because they differ in size. |
| c: | Smaller the size of the DNA fragment, shorter the distance it travels through agarose gel. |
| d: | Pure DNA can be visualized directly by exposing it to UV radiation without any staining. |
1. Only (c) and (d)
2. Only (a) and (c)
3. Only (b) and (c)
4. Only (a) and (b)
Subtopic: Separation and Isolation of DNA fragments |
87%
From NCERT
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Upon exposure to UV radiation, DNA stained with ethidium bromide will show:
1. Bright orange colour
2. Bright red colour
3. Bright Blue colour
4. Bright yellow colour
1. Bright orange colour
2. Bright red colour
3. Bright Blue colour
4. Bright yellow colour
Subtopic: Separation and Isolation of DNA fragments |
91%
From NCERT
NEET - 2023
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During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:
| 1. | Polysaccharides | 2. | RNA |
| 3. | DNA | 4. | Histones |
Subtopic: General Design of an rDNA experiment |
88%
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NEET - 2023
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In gene gun method used to introduce alien DNA into host cells, microparticles of ___________ metal are used.
| 1. | Silver | 2. | Copper |
| 3. | Zinc | 4. | Tungsten or gold |
Subtopic: Transforming Plant & Animal Cell |
92%
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NEET - 2023
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