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The optimum pH for the activity of pepsin is about ________.

The function of the enzyme-substrate complex is to provide an alternative reaction pathway that ________.

“Physiological pH,” the pH for optimum activity for most enzymes, is a pH equal to about ________.

In the lock-and-key model of enzyme action, the enzyme active site is thought of as ________.

A competitive inhibitor is one that ________.

“Physiologic conditions” for reactions within the body are approximately ________.

To what main class of enzymes does the enzyme that catalyzes the following reaction belong? O OH CH3——COO- → CH3—H—COO-

“Physiologic conditions” for reactions within the body are approximately ________.

Enkephalins are polypeptides that have ________.

Denaturation of a protein ________.