Exam 20: Enzymes and Vitamins

Urea is converted to ammonia and carbon dioxide by the action of urease. What will be the effect on the rate if the temperature of the reaction is lowered from (the optimum temperature) to

Another name for a zymogen is a(n)________.

ions are used in the functioning of

Consider an enzymatic reaction in which the initial concentration of substrate is low. If the amount of enzyme is held constant, but the amount of substrate is increased, the rate of an enzyme catalyzed reaction will

Indicate whether each of the following is fat soluble or water soluble. -niacin

When an end product from an enzyme-mediated sequence is also an inhibitor for an earlier step in the reaction sequence, the process is referred to as

The full name of the enzyme LDH is ________.

A compound that binds to the enzyme at a site other than the active site, and changes its shape so that a substrate cannot enter the active site, is called a(n)

Indicate whether each of the following is fat soluble or water soluble. -vitamin K

Indicate whether each of the following is fat soluble or water soluble. -pantothenic acid

To what main class of enzymes does the enzyme that catalyzes the following reaction belong?

When a substrate binds to an enzyme for reaction, it binds to the

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

Indicate whether each of the following is fat soluble or water soluble. -riboflavin

To what main class of enzymes does the enzyme that catalyzes the following reaction belong?

Most enzymes are deactivated permanently above a temperature of about

Most enzymes are

Urease catalyzes only the hydrolysis of urea, and no other substrates. This limited activity is called

Indicate whether each of the following is fat soluble or water soluble. -ascorbic acid

When a cofactor is a small organic molecule, it is known as a(n)