Quiz 5 Enzymes (Unit 2)

A + B

( Substrate + Enzyme)

C-D-E

(Enzyme - Products) (COMPLEX)

A-B-C

(Enzyme - Substrate) (COMPLEX)

C + D + E

(Products + Enzyme)

calcium, vitamins, copper, cobalt, iron, zinc

(Select all that apply.) Choose enzyme cofactors mentioned in the lesson.

Substrate

A compound which is involved in a chemical reaction and is chemically changed by the reaction.

1.5 between 7 and 8

A digestive enzyme in stomach Juices has an optimal pH of __________ other enzyme have an optimal pH __________________.

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:

True

An enzyme may react with several substrate chemicals simultaneously.

Cofactor

An inorganic metal or small organic molecule which attaches to the protein portion of the enzyme and plays an important role in activating that enzyme.

False

An organism can live without enzymes.

iron, copper, cobalt, zinc, calcium, and vitamins

Cofactors are often vitamins or metallic ions such as,

DNA RNA

Direction of the _________ through the ________

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

Enzymes:

100s

Giant enzyme molecule composes of ________ amino acids.

they may not be able to react

If the reactants found in a cell are removed from the cell how will they behave chemically?

A or B

In the figure illustrating the typical enzyme reaction, which is a substrate reactant?

substrate

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

True

Numerous different enzymes are produced by the cells.

cofactor

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

Active site

The region on the surface of an enzyme molecule where the substrate molecule binds and reacts with the enzyme.

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?

Enzyme

an enzyme is a large protein. It helps speed up biochemical processes in the body. Without them these processes would occur too slowly for us to live.

cofactor

plays an important role in activating that enzyme