5.3.6 - Temperature & Enzyme Activity

Question 1

Describe The Effect Of Low Temperature On Enzyme Activity
(4 Points)

Answer 1

~ Molecules have less kinetic energy.

~ A lower frequency of successful collisions between substrate molecules, and the active site.

~ Less frequent enzyme-substrate complexes forming.

~ Substrates and enzymes collide with less energy, making it less likely for bonds to be formed or broken.

Question 2

Describe The Effect Of High Temperature On Enzyme Activity
(4 Points)

Answer 2

~ Molecules have more kinetic energy.

~ A higher frequency of successful collisions between substrate molecules, and the active site.

~ More frequent enzyme-substrate complexes forming.

~ Substrates and enzymes collide with more energy, making it more likely for bonds to be formed or broken.

Question 3

What Is Meant By Enzymes ‘Denature’?

Answer 3

If temperatures exceed a certain point, the rate at which an enzyme catalyses a reaction drops.

Question 4

Describe The Effect Of Denaturation On Enzyme Activity
(4 Points)

Answer 4

~ Increase kinetic energy and vibrations, puts a strain on the bonds, until they begin to break.

~ Breaking of the bonds, cause the tertiary structure of the enzyme to change.

~ Active site is permanently damaged, its shape is no longer complementary to the substrate, meaning it can’t bind.

~ Causing denaturation.

Question 5

Describe How Higher Temperatures Can Affect Organisms Life Cycles, Development & Distribution
(3 Points)

Answer 5

~ Increases metabolism, increasing development.

~ Too high affects some organisms metabolism, decreasing development.

~ Affects organisms distribution, as some may have to migrate to find cooler temperatures.