Biology Unit 2 Quiz 5

False

An organism can live without enzymes. True False

substrate

Involved in a chemical reaction and is chemically changed by the reaction

cofactor

plays an important role in activating that enzyme

calcium vitamins copper cobalt iron zinc

(Select all that apply.) Choose enzyme cofactors mentioned in the lesson. calcium nonmetals vitamins copper cobalt iron zinc

catalyst

A substance which accelerates any chemical reaction but is not consumed by the reaction is called a ______________________

protein

An enzyme is a large ___________________ molecule.

a biological catalyst

An enzyme is: a biological reactant a biological product a biological catalyst a biological co-factor

True

An enzyme may react with several substrate chemicals simultaneously. True False

are produced at the direction and translation of DNA and RNA respectively

Enzymes: are formed from accelerated decomposition of lipids are produced at the direction and translation of DNA and RNA respectively must be introduced from appropriate foods, vitamins, minerals, etc.

they may not be able to react

If the reactants found in a cell are removed from the cell how will they behave chemically? they may not be able to react they will yield the same chemical products no reaction will take place they will all react but at a slower rate

A or B

In the figure illustrating the typical enzyme reaction, which is a substrate reactant? A E B C C or D A or B D

True

Numerous different enzymes are produced by the cells. True False

cofactor

Often enzymes require a ______________________ in order for them to function as a catalyst.

active site

The region where the substrate molecule binds and reacts with the enzyme

substrate

The substance on which the enzyme acts is called the ___________________________ chemical.

to act as a catalyst in chemical reactions.

Why are enzymes necessary? to act as a catalyst in chemical reactions. to conserve the stored energy of a cell to retard the rate of decomposition