Chapter 3

Question 1

Enzyme

Answer 1

Proteins that act as as biological catalysts to speed up the rate of reaction
They lower activation energy

Question 2

Substrate - complex model

Answer 2

Substrate binds to the active site
Non competitive inhibitors bind to allosteric site

Question 3

Activation energy

Answer 3

Minimum amount of energy required to energise atoms/molecules

Question 4

Factors - temperature

Answer 4

Optimal temp range.
Greater number d Collisions occurring

Question 5

Factors - denaturaturation

Answer 5

A conformational change of the active site. Prohibits substrates to bind. Irreversible change

Question 6

Factors - substrate - concentration

Answer 6

Reaction rate will increase as the substrate concentration increases. There are more reactants available to undergo reactions. Occur until the saturation point is reached.

Question 7

Inhibitors

Answer 7

Bind to enzyme and prevent function
Competitive and non competitive

Question 8

Competitive

Answer 8

Bind to active site, substrate and inhibitor have complementary shape to active site and compete for it

Question 9

Non competitive

Answer 9

Inhibitor binds to an enzyme at the alosteric site L
Causes a conformational change in active site which prevents substrate from binding to it. Blocks reaction..

Question 10

Catabolic

Answer 10

Reactions that break down molecules and release energy

Question 11

Anabolic

Answer 11

Reactions that build molecules and require energy