Enzymes Watch

foxstudy
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As enzyme concentration increases, what happens to the rate of reaction?

I understand that obviously the rate of reaction will increase as there are more enzymes able to bind to the substrate molecules. However, after a certain point, the rate of reaction plateaus and I don't understand why. Surely, it would decrease as there are no more substrate molecules and therefore no enzyme-substrate complexes.
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foxstudy
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BobbJo
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(Original post by foxstudy)
As enzyme concentration increases, what happens to the rate of reaction?

I understand that obviously the rate of reaction will increase as there are more enzymes able to bind to the substrate molecules. However, after a certain point, the rate of reaction plateaus and I don't understand why. Surely, it would decrease as there are no more substrate molecules and therefore no enzyme-substrate complexes.
The rate of a chemical reaction increases as the substrate concentration increases. Enzymes can greatly speed up the rate of a reaction. However, enzymes become saturated when the substrate concentration is too high.
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foxstudy
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(Original post by BobbJo)
The rate of a chemical reaction increases as the substrate concentration increases. Enzymes can greatly speed up the rate of a reaction. However, enzymes become saturated when the substrate concentration is too high.
Yes but that's the effect of substrate concentration on the rate of reaction. What about the effect of enzyme concentration on the rate of reaction?
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6573282
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the curve wouldn't decrease, because that would mean the rate of reaction is negative and thats not possible. So even when there's no substrate left, the lowest the rate can be is 0 which is where the curve plateaus.

hope that helped
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foxstudy
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(Original post by 6573282)
the curve wouldn't decrease, because that would mean the rate of reaction is negative and thats not possible. So even when there's no substrate left, the lowest the rate can be is 0 which is where the curve plateaus.

hope that helped
That makes sense but doesn't it decrease on the effect of temp on rate of reaction?
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BobbJo
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(Original post by foxstudy)
Yes but that's the effect of substrate concentration on the rate of reaction. What about the effect of enzyme concentration on the rate of reaction?
As enzyme concentration increases, rate of reaction increases.
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