A metal ion required for enzyme activity is called a. cofactor b. a proenzyme c. a subtrate d. a zymogen

The proteins : oxidase ,kinase,lipase, isomerase are all known to function as  a. channels b. transporters c.receptors d. enzymes e. none of the above

When maltose is broken down into glucose monosaccharides, in an enzymatic reaction, the maltosemolecule is properly called:A. the substrateB. the productC. the catalystD. the enzymeE. the inhibitor

The enzyme trypsin is sold as a dietary enzyme supplement. Explain what would happen if trypsin is taken with food. (Research what trypsin does, where it is active in the body. From this you can determine how its activity or the location of its activity will change when taken orally)

Which of the following functions is morecharacteristic of carbohydrates than of proteins?a. contractionb. energy storagec. catalyzing reactionsd. immune defensee. intercellular communication

a. How does an enzyme speed up the reaction of a substrate? b. After the products have formed, what happens to the enzyme?

Why would it be advantageous for a cell to control the activity of an enzyme as well as its synthesis?

If you eat a spoonful of sugar (sucrose), propose a mechanism for breaking it down into glucose and fructose.

Which of the following is a reactive oxygen species that can damage proteins? Select one: a. vitamin C b. superoxide c. arsenic d. oxygen e. heat

How does an enzyme affect a chemical reaction? Select all that apply.     A. Lowers the activation energy   B. Decreases the rate of the reaction   C. Increases the activation energy   D. Increases the rate of the reaction