Mentor05
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#1
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Hi,

Please can someone help me with this question? I don't know how to approach it. Thank you!

https://ibb.co/3skpGQG
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macpatgh-Sheldon
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#2
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First there is a simple error in part (e): it should read "factor" NOT "faction" [this must be an Edexcel Q]
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Mentor05
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#3
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(Original post by macpatgh-Sheldon)
First there is a simple error in part (e): it should read "factor" NOT "faction" [this must be an Edexcel Q]
Haha! I didn't realise that. It's from the revision website 101 Biology. I was thinking the limiting reactant would the active site.
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Mentor05
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Please could you help me with di and dii. Thanks!

(Original post by macpatgh-Sheldon)
First there is a simple error in part (e): it should read "factor" NOT "faction" [this must be an Edexcel Q]
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thomas.rhett
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#5
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(Original post by Mentor05)
Please could you help me with di and dii. Thanks!
In d(i) substrate concentration is kept constant while increasing enzyme concentration. The rate increases with increasing enzyme concentration at first because enzyme concentration is limiting and the levels off when substrate concentration becomes limiting at high concentrations of enzyme.

In d(ii), since substrate concentration is increased exponentially, as enzyme concentration increases, substrate concentration increases even more. So substrate concentration never becomes limiting. In the first part of the graph, the two lines overlap because enzyme concentration is limiting and increasing substrate concentration has no effect. However the curve never levels off but continues rise along the same tangent.

d(iii) In d(i) enzyme concentration is limiting when enzyme concentration is low and substrate concentration is limiting when enzyme concentration is high. in d(iii) enzyme concentration is the only limiting factor throughout.
Last edited by thomas.rhett; 2 months ago
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Mentor05
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#6
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(Original post by thomas.rhett)
In d(i) substrate concentration is kept constant while increasing enzyme concentration. The rate increases with increasing enzyme concentration at first because enzyme concentration is limiting and the levels off when substrate concentration becomes limiting at high concentrations of enzyme.

In d(ii), since substrate concentration is increased exponentially, as enzyme concentration increases, substrate concentration increases even more. So substrate concentration never becomes limiting. In the first part of the graph, the two lines overlap because enzyme concentration is limiting and increasing substrate concentration has no effect. However the curve never levels off but continues rise along the same tangent.

d(iii) In d(i) enzyme concentration is limiting when enzyme concentration is low and substrate concentration is limiting when enzyme concentration is high. i n d(iii) enzyme concentration is the only limiting factor throughout.
Thank you so much! Could you say active site instead of enzyme? This is what I have got.
Last edited by Mentor05; 2 months ago
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