Which one of the following is NOT true? Enzymes are used up in chemical reactions. An enzyme's function depends on its three-dimensional shape. Enzymes emerge unchanged from the reactions they catalyze. Enzymes are very specific for certain substrates. An enzyme binds to its substrate at the enzyme's active site.

Enzymes are used up in chemical reactions.

Explanation:

Enzymes are biological catalysts that speed up or accelerate the rate of chemical reactions within a biological system. Enzymes regulate the rate of chemical reactions without being destroyed in the chemical reaction nor altered in the biological process. Specific molecules called substrate, bind to the active site of enzymes to produce molecules referred to as products. Enzymes are vital to life as they participate in so many biological process in body such as in digestion, DNA synthesis. The function of an enzyme is dependent on the three-dimensional structure of the enzyme.

An example of an enzyme is hexokinase, that converts glucose to glucose-6-phosphate.

tunica muscularis

Gastrointestinal motility results from coordinated contractions of the tunica muscularis, the muscular layers of the alimentary canal. Throughout most of the gastrointestinal tract, smooth muscles are organized into two layers of circularly or longitudinally oriented muscle bundles.

Explanation: