Physiology

Question 1

What is the polypeptide portion of the enzyme called

Answer 1

Apoenzyme

Question 2

What is a coenzyme

Answer 2

A non protein prosthetic group that binds to the sctive site to maintain its shape

Question 3

What are oxidoreductases

Answer 3

Enzyme that catalyses the transfer of electrons from donors to acceptors

Question 4

Transferases

Answer 4

catalyse the transfer of a functional group between molecules

Question 5

Hydrolases

Answer 5

Catalyse the breaking of bonds by the addition of water molecules (hydrolysis reaction)

Question 6

Lyases

Answer 6

Breaks down double bonds by adding, CO2, H2O or NH3

Question 7

Isomerases

Answer 7

Catalyses the changing of isomers in molecules by breaking and reforming groups.

Question 8

Ligase

Answer 8

Forms new covalent bonds using energy from atp

Question 9

What is enzyme specificity

Answer 9

Enzymes can catalyse:
Specific bond:
Specific substrate
Group of similar substrates

Question 10

What is absolute enzyme specificity

Answer 10

When enzymes bind to a specific substrate

Question 11

What is group enzyme specificity

Answer 11

Catalyses reaction between similar substrates.

Question 12

What is linkage enzyme specificity

Answer 12

Catalyses a reaction with a specific type of bond

Question 13

What is an isoenzyme

Answer 13

Different from of an enzyme that catalyses the same reaction in a different tissue

Question 14

What is positive allosteric regulation

Answer 14

When an effector speeds up enzyme action

Question 15

What is an effect molecule

Answer 15

A molecule that changes the activity of an enzyme when it binds to the allosteric region

Question 16

What is negative allosteric regulation

Answer 16

When an effector slows down enzyme action