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Q. No.Assertion (A): An alien DNA is linked with the origin of replication for making multiple identical copies.
Reason (R): An origin of replication is a specific DNA sequence which is responsible for initiating replication
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: General Design of an rDNA experiment |
80%
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If you want to isolate DNA from a fungal cell, the enzyme that should not be used for the purpose is:
1. Protease
2. RNase
3. DNase
4. Chitinase
1. Protease
2. RNase
3. DNase
4. Chitinase
Subtopic: Process of Biotech |
57%
From NCERT
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If one wants to recover many copies of the target DNA, it should be cloned in a vector:
| 1. | that is a single-stranded DNA molecule |
| 2. | whose origin [ori] supports a high copy number |
| 3. | that carries two selectable markers |
| 4. | whose cloning sites are all clustered at one place |
Subtopic: Cloning Vector |
91%
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In agarose gel electrophoresis, the DNA fragments separate (resolve) according to their:
1. charge
2. size
3. 3-D shape
4. base composition
1. charge
2. size
3. 3-D shape
4. base composition
Subtopic: Separation and Isolation of DNA fragments |
93%
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The enzyme used in PCR:
| I: | is a DNA-dependent DNA polymerase |
| II: | extends the primers in template independent manner |
| III: | is thermostable |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: Polymerase Chain Reaction: PCR |
From NCERT
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Techniques to alter the chemistry of genetic material (DNA and RNA), to introduce these into host organisms and thus change the phenotype of the host organism comes under:
1. Bioprocess engineering
2. Genetic engineering
3. Bioinformatics
4. Biomedical technology
1. Bioprocess engineering
2. Genetic engineering
3. Bioinformatics
4. Biomedical technology
Subtopic: General Design of an rDNA experiment |
90%
From NCERT
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If a plasmid is to be used as a cloning vector, the most important feature which must be present in it is:
| 1. | Origin of replication (Ori) |
| 2. | Presence of a selectable marker |
| 3. | Presence of sites for restriction endonuclease |
| 4. | Being linear rather than circular |
Subtopic: Cloning Vector |
83%
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What would not be true for a plasmid present in some bacterial cells?
| 1. | It is extrachromosomal DNA |
| 2. | It is circular and double stranded |
| 3. | It gets replicated with the help of ori of chromosomal DNA |
| 4. | It confers characters like resistance to antibiotics to bacterial cells |
Subtopic: Cloning Vector |
63%
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Restriction enzymes produced by some bacteria:
| 1. | cleave phosphodiester bond in the main chromosomal DNA of the bacterium. |
| 2. | cut single stranded DNA at random positions. |
| 3. | prevent the multiplication of bacteriophage in bacteria. |
| 4. | provide resistance against antibiotics. |
Subtopic: Restriction Enzymes - Main Enzymes | Restriction Enzymes: Historical Background |
52%
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Which of the following methods is especially useful for transforming animal cells?
1. Electroporation
2. Biolistics
3. Microinjection
4. Heat shock
1. Electroporation
2. Biolistics
3. Microinjection
4. Heat shock
Subtopic: Transforming Plant & Animal Cell |
89%
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