Chapter 5 Worksheets (Enzymes)

Question 1

What Joins two molecules together and often uses energy supplied by ATP?

Answer 1

Lygasases (polymerases)

Question 2

What are the Molecules the enzyme acts on?

Answer 2

Substrate

Question 3

What are either vitamins or contain vitamins?

Answer 3

Coenzymes

Question 4

The biding of an apoenzyme and its cofactor(s) form this enzyme.

Answer 4

Haloenzyme

Question 5

Critical to enzyme activity, which has been likened to the fit between a lock and key.

Answer 5

Enzyme-substrate specificity

Question 6

Organic catalysts also known as

Answer 6

Enzymes.

Question 7

Transfer of electrons or hydrogen atoms from one molecule to another.

Answer 7

Oxidoreductases

Question 8

Some protein enzymes are composed of both protein and nonprotein portions.

Answer 8

Apoenzymes

Question 9

Catabolizes molecules by adding water in the process known as hydrolysis

Answer 9

Hydrolases

Question 10

The shape of an enzyme’s functional site is complementary to the shape of the enzyme’s substrate.

Answer 10

Active Site

Question 11

The enzyme and its substrate bind to form a temporary intermediate compound called an

Answer 11

Enzyme- Substrate Complex

Question 12

Enzymes catalyze reactions by lowering the

Answer 12

activation Energy (the amount of energy needed to trigger a chemical reaction)

Question 13

An enzyme can be activated by binding of a cofactor to the enzyme at a site located away from the active site- a site called.

Answer 13

allosteric site

Question 14

Are shaped such that they fit into the enzyme’s active site permanently or reversibly

Answer 14

Competitive inhibitors

Question 15

Also called negative- feedback the end product of a metabolic pathway allosterically inhibits the initial step, shutting down the pathway.

Answer 15

Feedback Inhibition

Question 16

Do not attach to the active site but instead bind to an allosteric site on the enzyme.

Answer 16

Noncompetitive