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The rate of enzyme activity rapidly reduces after certain temps as the enzymes have been denatured. However, towards the end, the line tails off-the rate of denaturing is being reduced. Is this because there is a lower enzyme concentration, so the rate is less? Are there any other reasons for this? Any help would be great as this is for my A-level Biology coursework.

2006-11-21 05:22:56 · 4 answers · asked by sophie.clark 2 in Science & Mathematics Biology

4 answers

enymes are like jigsaw pieces. The only fit into one substrate, however when they are heated then they become more and more effective until they reach a certain point whenh they are at their highest - the optimum temperature. After this point they are less and less effective until they become denatured, which means that they change shape and don't fit with the substrate, they become denatured.
Hope this helps as i am doing enzymes in biology at the mo.

2006-11-23 04:48:30 · answer #1 · answered by Invisible Pink Unicorn 5 · 0 0

The decrease in enzyme activity levels off because it has already been mostly denatured at the previous temperatures so there is no further denaturation occuring. Most enzymes have an optimal temperature of 37 C, the activity against temperature should look like a bell curve with the peak near that point.

2006-11-21 15:42:52 · answer #2 · answered by Ellie 4 · 0 0

Yes, what you are saying is correct. The enzyme has an optimal temperature and after this point the increasing temp will start to break the various bonds holding the protein (enzyme) together and it will become denatured. The tail off is just like the slope rising up at the start where the enzyme has not yet reached it's optimal temp.

Can't think of any other reason for this though!

2006-11-21 13:32:09 · answer #3 · answered by Showaddywaddy 5 · 0 0

Another reason could be that the substrate becomes limiting even if the activity of the enzyme would continue to increase with temperature. Therefore the reaction encounters a plateau.

2006-11-21 14:01:25 · answer #4 · answered by Jesus is my Savior 7 · 0 0

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