Enzymes B4

Question 0

what codes for enzymes?

Answer 0

enzymes are proteins made by cells which are given instructions by genes

Question 1

what are enzymes?

Answer 1

enzymes are proteins that speed up chemical reactions

Question 2

state and explain what will happen to the reaction rate of an enzyme at 0 degrees

Answer 2

no reaction: the enzyme and substrate have no energy to move so they don’t collide

Question 3

state and explain what will happen to the reaction rate of an enzyme at 40 degrees

Answer 3

high reaction rate - this is the optimum temperature for enzymes and they collide with the substrate

Question 4

state and explain what will happen to the reaction of an enzyme at 70 degrees

Answer 4

no reaction - the enzyme is denatured. the active site shape doesn’t fit the substrate anymore but there’s still a high collision rate

Question 5

enzyme activity at different temperatures is a balance between:

Answer 5

• increased rates of reaction as temperature increases

- changes to the active site at higher temperatures including denaturing