Question

restriction endonucleases are enzymes. what type of macromolecule are endonucleases? think of a general way that these enzymes might go about the business of cutting dna.

Explanation:

Enzymes, including restriction endonucleases, are proteins. Proteins are macromolecules made up of amino acids. Regarding how they cut DNA, enzymes have specific active sites. These active sites can bind to specific DNA sequences (recognition sites). Once bound, the enzyme can catalyze the breaking of phosphodiester bonds in the DNA backbone. This is similar to how a key (enzyme's active site) fits into a specific lock (DNA recognition sequence) and then performs a chemical reaction (cutting the DNA).

Answer:

Restriction endonucleases are proteins. They likely bind to specific DNA sequences (recognition sites) via their active sites and then catalyze the cleavage of phosphodiester bonds in the DNA backbone.