Which of the following is an example of a dehydration reaction? a. a group of enzymes "cut" a mutated protein into smaller molecules, preventing it from harming the cell. b. amylose, a polysaccharide, is broken down by amylase, an enzyme found in your saliva. c. dna molecules are replicated in a cell by building new dna molecules from nucleotides. d. casein, a type of protein found in milk, is broken down into amino acids by enzymes in the digestive tract.