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mediumMCQNEET 2020 E12026Biology
1 mark

Choose the correct pair from the following:

  1. A
    Ligases - Join the two DNA molecules
  2. B
    Polymerases - Break the DNA into fragments
  3. C
    Nucleases - Separate the two strands of DNA
  4. D
    Exonucleases - Make cuts at specific positions within DNA

Solution & Step-by-step Explanation

Ligases: Enzymes that join two DNA molecules (DNA glue). This is correct.
Polymerases: Synthesize DNA strands; they do not break them.

Nucleases: Enzymes that cut DNA. (Exonucleases cut at ends; Endonucleases cut within).

Restriction Endonucleases: Make cuts at specific positions (palindromes) within DNA.

Practice this question

Try it yourself before checking the explanation above.

Choose the correct pair from the following:
A
Ligases - Join the two DNA molecules
B
Polymerases - Break the DNA into fragments
C
Nucleases - Separate the two strands of DNA
D
Exonucleases - Make cuts at specific positions within DNA

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