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