enzymes

Question 1

protein part

Answer 1

apoenzyme

Question 2

non-protein part (inorganic ion, small organic molecule)

Answer 2

cofactor

Question 3

small organic molecule (non-protein part)

Answer 3

coenzyme

Question 4

biologically active conjugated enzyme

Answer 4

holoenzyme

Question 5

enzyme structure

Answer 5

apoenzyme + cofactor = holoenzyme

Question 6

During the activation energy part the molecules are said to be in a?

Answer 6

transition state

Question 7

• proteins
• globular
• complex 3D structure

Answer 7

enzyme

Question 8

The __ and the __ __ inside the active site permits a chemical reaction to proceed more easily

Answer 8

shape

chemical environment

Question 9

Cofactors that are bound and released easily?

Answer 9

coenzymes

Question 10

Tightly bound cofactors are

called?

Answer 10

prosthetic groups

Question 11

The reactants that are activated by the enzyme?

Answer 11

substrate

Question 12

The specificity of enzymes to their substrates is determined by the?

Answer 12

active site

Question 13

Examples of oxidoreductases

Answer 13

Dehydrogenases

Oxidases

Question 14

Examples of transferases

Answer 14

Transaminase

Kinases

Question 15

Examples of hydrolases

Answer 15

Estrases

Digestive enzymes

Question 16

Examples of isomerases

Answer 16

Phospo hexo isomerase

Fumerase

Question 17

Examples of lyases

Answer 17

Decarboxylases

Aldolases

Question 18

Examples of ligases

Answer 18

Citric acid synthetase

Question 19

Fit between the substrate and the active site of the enzyme is exact

Answer 19

The Lock and Key Hypothesis

Question 20

This explains the loss of activity when

enzymes denature

Answer 20

The Lock and Key Hypothesis

Question 21

When a substrate combines with an enzyme, it induces a change in the enzyme’s conformation

Answer 21

The Induced Fit Hypothesis

Question 22

This explains the enzymes that can react with a range

of substrates of similar types

Answer 22

The Induced Fit Hypothesis

Question 23

Factors affecting enzymes

Answer 23

substrate concentration
pH
temperature
inhibitors

Question 24

chemicals that reduce the rate of

enzymic reactions?

Answer 24

Inhibitors

Question 25

Combine with the

functional groups of the amino acids in the active site, irreversibly.

Answer 25

Irreversible inhibitors

Question 26

These can be washed out of the solution of enzyme by dialysis

Answer 26

Reversible inhibitors

Question 27

These compete with the substrate molecules for the active site.

Answer 27

Competitive

Question 28

These are not 
influenced by the 
concentration of the 
substrate. It inhibits 
by binding 
irreversibly to the 
enzyme but not at 
the active site

Answer 28

Non-competitive