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Q. No.
Consider the given two statements:
Assertion (A): It is desirable to use restriction enzymes that make asymmetrical cuts in construction of rDNA molecules.
Reason (R): Formation of asymmetrical cuts facilitates the function of DNA ligase.
 
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. Both (A) and (R) are False.
4. (A) is True, (R) is False.
Subtopic:  Restriction Enzymes - Main Enzymes |
 54%
From NCERT
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Identify the incorrect statement regarding restriction endonucleases used in rDNA technology?
I: They cleave dsDNA into fragments at specific recognition sites within molecules known as restriction sites.
II: These enzymes are found in bacteria and provide a defense mechanism against invading viruses.

1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic:  Restriction Enzymes - Main Enzymes |
From NCERT
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Consider the given two statements:
Assertion (A): Restriction enzymes are found in bacteria and provide a defense mechanism against invading viruses.
Reason (R): They interact with membranes of the host bacterial cells and remove all the receptor sites by the viruses.
 
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:  Restriction Enzymes - Main Enzymes |
 54%
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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Consider the two given statements:
Assertion (A):  Foreign and vector DNA must be cleaved with the same restriction enzyme when making recombinant DNA.
Reason (R): Each restriction enzyme cuts DNA at a specific cleavage site.
 
1. Both (A) and (R) are True and (R) correctly explains (A).
2. (A) is True; (R) is False
3. (A) is False; (R) is True
4. Both (A) and (R) are True but (R) does not correctly explain (A).
Subtopic:  Restriction Enzymes - Main Enzymes |
From NCERT
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