Respiration and enzymes mock

Question 1

What is an enzyme

Answer 1

A biological catalyst

Question 2

Anaerobic respiration in humans

Answer 2

glucose → lactic acid

Question 3

What is a catalyst

Answer 3

A catalyst is a chemical which increases the rate of a reaction without being used up itself in the reaction

Catalysts take part in the reaction but afterwards remain unchanged and so are free to catalyse more reactions.
Cells contain hundreds of different enzymes, each catalysing a different reactuon

Question 4

Temperature - how does it affect the rate of reaction

Answer 4

As temperature increases, the enzyme and substrate have more kinetic energy
They move faster and so there are more successful collisions
At a too high temperature (or pH level) the active site changes shape so it is no longer complimentary to the substrate
the enzyme is denatured

Question 5

Anaerobic respiration in plants / yeast

Answer 5

glucose → ethanol + carbon dioxide

Question 6

Aerobic respiration equation

Answer 6

glucose + oxygen → carbon dioxide + water

C6H12O6 + 6O2 → 6CO2 + 6H2O