Exams › NEET › Biology

Endonucleases hydrolyse internal phosphodiester bonds in a polynucleotide chain (DNA). While exonucleases hydrolyse terminal phosphodiester bonds in a polynucleotide chain (DNA).

1. Endonucleases hydrolyse terminal bonds.
2. Exonucleases hydrolyse internal bonds.
3. Endonucleases hydrolyse internal bonds.
4. Exonucleases hydrolyse both internal and terminal bonds.

Correct answer: Endonucleases hydrolyse internal bonds.

Solution

Endonucleases cleave phosphodiester bonds within a nucleic acid chain, not at the ends. Exonucleases act on terminal bonds, removing nucleotides from the 5' or 3' end.

Related NEET Biology questions

• The sequence that controls the copy number of the linked DNA in the vector, is termed:
• For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of:
• Biolistics (gene-gun) is suitable for:
• PCR and Restriction Fragment Length Polymorphism are the methods for:
• Which one is a true statement regarding DNA polymerase used in PCR
• The separated DNA fragments can be visualised only after staining the DNA with Ethidium bromide followed by exposure to UV radiation.

⚔️ Practice NEET Biology free + battle 1v1 →