Question:
Choose the incorrect statements:
A) Alien DNA can be linked to origin of replication of DNA.
B) DNA ligase can act as a restriction enzyme.
C) Each restriction endonuclease recognizes a specific palindromic nucleotide sequence in DNA.
D) Exonucleases will cut the specific position of DNA.
Choose the incorrect statements:
A) Alien DNA can be linked to origin of replication of DNA.
B) DNA ligase can act as a restriction enzyme.
C) Each restriction endonuclease recognizes a specific palindromic nucleotide sequence in DNA.
D) Exonucleases will cut the specific position of DNA.
Show Hint
Ligase = Glue; Restriction Enzyme = Scissors (Endonuclease); Exonuclease = Trimmer (cuts from ends).
Updated On: Jun 10, 2026
- A and B
- B and C
- A and C
- B and D
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Concept
Tools of recombinant DNA technology.
Step 2: Analysis
* Statement A is correct: Linking alien DNA to the origin of replication (ori) is necessary for replication. * Statement B is incorrect: DNA ligase joins DNA fragments; it does not cut them like a restriction enzyme. * Statement C is correct: Restriction endonucleases recognize specific palindromic sequences. * Statement D is incorrect: Endonucleases cut at specific internal positions, while exonucleases remove nucleotides from the ends of the DNA strand.
Step 3: Conclusion
Statements B and D are the incorrect statements.
Final Answer: (D)
Tools of recombinant DNA technology.
Step 2: Analysis
* Statement A is correct: Linking alien DNA to the origin of replication (ori) is necessary for replication. * Statement B is incorrect: DNA ligase joins DNA fragments; it does not cut them like a restriction enzyme. * Statement C is correct: Restriction endonucleases recognize specific palindromic sequences. * Statement D is incorrect: Endonucleases cut at specific internal positions, while exonucleases remove nucleotides from the ends of the DNA strand.
Step 3: Conclusion
Statements B and D are the incorrect statements.
Final Answer: (D)
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