Enzymes belong to the proteins category because enzymes are long chains of amino acids bound together by peptide bonds
Enzymes have a special marker on them called an active site that, like a puzzle piece, fits with only one other type of molecule, generally referred to as a substrate. The substrate is a molecule that will undergo a reaction that results in it splitting into two separate molecules, called products
The substrate-specific to a particular enzyme will bind at the active site, forming what is known as an enzyme/substrate complex. In other words, a complex formed by the union of the enzyme and substrate
Hence, the right answer is option E "both A and B"
The two processes that occur before the two strands of a DNA
molecule can separate during separate during the DNA replication is that their
hydrogen bonds should be broken in between of the molecule and bases and that
the molecule and the bases of it must be also unwind.