DP Chemistry (last assessment 2024)

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Question 18M.3.hl.TZ1.a

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.hl.TZ1.a
Level hl Paper 3 Time zone TZ1
Command term Explain Question number a Adapted from N/A
a.
[Maximum mark: 2]
18M.3.hl.TZ1.a

An inhibitor reduces the rate, V, of an enzyme-catalysed reaction.

Explain with reference to the binding site on the enzyme how a non-competitive inhibitor lowers the value of Vmax.

[2]

Markscheme

binds at allosteric site

OR

binds away from active site

 

changes shape of active site

OR

renders active sites ineffective

 

[2 marks]

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