CAIE A-Level Biology AS M 5 Graphs Data Transformation and Rates of Change Questions

Plot and interpret biological graphs, transform variables where appropriate and calculate rates of change from gradients or time-series data in Cambridge A Level Biology questions.

Exam points

Plot and interpret biological data, transform variables where appropriate and calculate rates of change from gradients or time-series graphs.

[Maximum number: 2]

Pepsin is an enzyme that hydrolyses proteins (protease). Some students used pepsin from the stomach of a mammal.

The activity of the pepsin was investigated by placing a small quantity of the enzyme with a known concentration of the protein albumen.

$Fig. 2.1 shows the progress of the enzyme-catalysed reaction that was carried out at \(20^{\circ$

Fig. 2.1 shows the progress of the enzyme-catalysed reaction that was carried out at \(20^{\circ

Calculate the initial rate of the reaction.
initial rate of reaction =

any two from:

anything within range 0.6 to 0.8 ;

$\mu \mathrm{mol} \mathrm{dm}^{-3} \mathrm{~min}^{-1} / \mu \mathrm{mol}$ per $\mathrm{dm}^{3}$ per $\min$ ;

$\mathbf{A} \mu \mathrm{mol}$ per $\mathrm{dm}^{3} / \mathrm{min}$ or $\mu \mathrm{mol} \mathrm{dm}^{-3} / \mathrm{min}$

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CAIE A-Level Biology AS M 5 Graphs Data Transformation and Rates of Change Questions question 1