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Question

The formation of covalent bonds between deoxyribose of one DNA fragment and phosphate of another DNA fragment is facilitated by

A
DNA ligase
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B
Permease
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C
DNA Phosphodiester bonds
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D
Endonuclease
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Solution

The correct option is A DNA ligase

A.DNA ligase – this enzyme is involved in the formation of covalent bonds between the sugar of one nucleotide to phosphate. It is called Ester bond.

B.Permeases – these aremembrane transport proteins, a class of multipass transmembrane proteins that allow the diffusion of a specific molecule in or out of the cell in the direction of a concentration gradient, a form of facilitated diffusion.

C.DNA Phosphodiester bond – ester bonds present between a phosphate and two sugars of two DNA nucleotides are called DNA phosphodiester bond.

D.Endonucleases – enzymes cut the DNA molecules inside the strands.

So, the correct option is ‘DNA ligases’.

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