The patellar region is _________ to the tarsal region.

A. One: A molecule with a single phosphate group is called AMP (adenosine monophosphate), not ADP.

B. Two: ADP (adenosine diphosphate) has two phosphate groups attached to the adenosine molecule. It functions as an energy carrier, and when a third phosphate is added, it becomes ATP.

C. Three: A molecule with three phosphate groups is ATP (adenosine triphosphate), which stores more energy than ADP.

D. None: Molecules with no phosphate groups would not be classified as ADP. The presence of two phosphates is essential for ADP’s role in energy transfer.

A. The enzyme will denature and become inactive: Salivary amylase works best at a neutral to slightly basic pH, such as in the mouth. Once it reaches the stomach, the highly acidic environment disrupts its three-dimensional structure, causing denaturation and loss of activity

B. The enzyme will continue to function as it remains unchanged in chemical reactions: While enzymes are not consumed in reactions, their activity depends on pH and temperature. At a gastric pH of 2.5, salivary amylase cannot maintain its shape, so it stops functioning.

C. The enzyme will assume an alternate form and catalyze additional reactions: Enzymes are highly specific to their structure and active site. Once denatured, they do not take on new functional forms or catalyze new reactions.

D. The enzyme will denature but retain its function: Denaturation disrupts the enzyme’s active site, preventing substrate binding. If the enzyme denatures, it loses its catalytic ability entirely and cannot retain its original function.