Maths Skill: Drawing a Graph for Enzyme Rate Experiments

Question 1

Enzyme rate experiments are experiments that are carried out to determine the

Answer 1

effect of changing a particular factor on the rate of a reaction that is catalysed by an enzyme

Question 2

Factors that can be changed include:

Answer 2

Temperature
pH
Enzyme concentration
Substrate concentration

Question 3

The ways in which the reaction rate can be measured include

Answer 3

Measuring how much of a product is made in a given time period (e.g. using a gas cylinder to collect the oxygen produced from the breakdown of hydrogen peroxide by catalase)

. The first is to measure how quickly a precipitate is formed by observing the ‘cloudiness’ of a liquid.

The second is to measure the volume of gas produced using a gas syringe or a measuring cylinder over water.

Question 4

Line graphs should be used to present the results of enzyme rate experiments

The data should be plotted with the …………………variable on the x-axis and the dependent variable on the y-axis

Answer 4

independent X

dependent Y