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Q. No.Consider the given two statements:
Assertion (A):
The discovery of restriction enzymes led to the birth of recombinant DNA technology as a discipline.
Reason (R):
Restriction enzymes help in the precise cleavage of DNA at specific recognition sites, facilitating the insertion of foreign genes into plasmids.
1.
Both (A) and (R) are True and (R) is the correct explanation for (A)
2.
Both (A) and (R) are True but (R) is not the correct explanation for (A).
3.
(A) is True, but (R) is False.
4.
(A) is False, but (R) is True.
Subtopic: Restriction Enzymes - Main Enzymes |
88%
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Restriction enzymes are named:
| 1. | after the scientists who discover them. |
| 2. | based on the bacteria from which they are derived. |
| 3. | after the bacteriophage whose DNA is cut by them. |
| 4. | There is no convention or principles for naming restriction enzymes. |
Subtopic: Restriction Enzymes - Main Enzymes |
84%
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Subtopic: Restriction Enzymes - Main Enzymes |
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The process of extracting a substance that is adsorbed to another by washing it with a solvent is called as:
| 1. | Chelation | 2. | Centrifugation |
| 3. | Elution | 4. | Hybridisation |
Subtopic: Separation and Isolation of DNA fragments |
78%
From NCERT
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Enzymes that catalyze the removal of nucleotides in either the 5-prime to 3-prime or the 3-prime to 5-prime direction from the ends of single-stranded and/or double-stranded DNA are called:
| 1. | endonuclease | 2. | exonuclease |
| 3. | ligase | 4. | polymerase |
Subtopic: Introduction & History: I | Introduction & History: II |
75%
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The process by which a virus transfers genetic material from one bacterium to another is called:
| 1. | Transduction | 2. | Conjugation |
| 3. | Transformation | 4. | Translation |
Subtopic: Tools |
50%
From NCERT
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'Restriction' in Restriction enzyme refers to:
| 1. | Cleaving of phosphodiester bond in DNA by the enzyme |
| 2. | Cutting of DNA at specific position only |
| 3. | Prevention of the multiplication of bacteriophage by the host bacteria |
| 4. | All of the above |
Subtopic: Restriction Enzymes - Main Enzymes |
From NCERT
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'Heat shock' method in bacterial transformation:
| 1. | allows selection of transformants |
| 2. | promotes uptake of DNA through membrane transport proteins |
| 3. | creates pores in the bacterial plasma membrane and allows plasmid DNA to enter the bacterial DNA. |
| 4. | coagulates DNA in the bacterial cell. |
Subtopic: Transforming Plant & Animal Cell |
77%
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Consider the given two statements:
| Assertion (A): | DNA cannot pass through cell membranes. |
| Reason (R): | DNA is a hydrophobic molecule. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Separation and Isolation of DNA fragments |
68%
From NCERT
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Consider the given two statements
| Assertion (A): | In agar gel electrophoresis, smaller DNA fragments move farther than the larger DNA fragments. |
| Reason (R): | In agar gel electrophoresis, DNA fragments separate according to their size due to the sieving effect of the agarose gel. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True, (R) is False. |
| 4. | (A) is False, (R) is False. |
Subtopic: Separation and Isolation of DNA fragments |
88%
From NCERT
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