• The Influence Of Enzyme Concentration On The Rate …
  • Rate of Change for Enzyme Concentration …
  • rate depends onthe concentration of 2 different ..

Substrates of an enzyme are the chemicals altered by enzyme-catalysed reactions.

CHEM-GUIDE: Factors that influences the rate of reaction

Effect of Enzyme Concentration on rate of Hydrolysis of ..

Basically, the active site of the enzymes forms a temporary bond with the substrate.
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Take separate syringes each time, so the concentrations are not
mixed up, suck up 2cm³ of each concentration of amylase, and place
them in five different clean test tubes.

The Effect Of Substrate Concentration On The Activity …

As the temperature increases, so does the rate of reaction. But very high temperatures  enzymes.
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If you want an enzyme to work best, then you need it to have as fast a turnover as possible. You need as many molecules to meet up with that enzyme within a given time as possible. So, it makes sense that if there are more of the substrate molecules in a given space, the enzyme can meet up with more of them in a given time!

This is effectively what is happening when you alter the substrate . The enzyme, busily going about its catalytic work, will simply hang around until a substrate molecule collides with it appropriately. In the same way that increasing the temperature increases the chances of a favourable collision, so increasing the substrate concentration increases the chances - because there are simply more substrate molecules kicking about!

Unfortunately this doesn't carry on forever. Eventually you reach an optimum value - let's say this is 4 . If you increase the concentration of the substrate passed this point, it makes no difference. Why?

Well, it's all to do with the number of available sites. Yes, enzymes are kicking about, 'waiting' for substrate molecules to jump in so they can do their work. However, there's only so much work that each enzyme molecule can do. Eventually you'll reach a stage where there are more substrate molecules than there are enzyme molecules to work their magic - so, as the image hopefully shows, you've got too many substrate molecules for any extra to make any difference. If you raise the concentration any further, it will make no difference because there are no extra enzyme molecules to meet this supply.

This is, of course, assuming you keep everything the same except for the substrate concentration. So, increasing the substrate concentration increases the activity of the enzyme, up to a point, after which increasing the substrate concentration has no effect.


Traditional enzyme separation and preparation - …

As the concentration of amylase increases, so will the rate of reaction.
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I predict that my graph will have a positive correlation and will be
curved, as the increase in rate of reaction will not be equivalent in
value to the increase of enzyme concentration.

However, as the reaction progresses the concentration of the enzyme, amylase will decrease.
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An enzyme is a globular which acts as a biological . In other words, an enzyme is a biological molecule which speeds up the . It's not like any normal catalyst which you can throw into a reaction and it will speed the whole thing up. Because it is a protein, a biological molecule, an enzyme is susceptible to various biological factors. That is to say, an enzyme won't always have that much of an effect.

If you take a , S, which is supposed to turn into a product, P, then you might have to wait a while for the reaction to happen. The chances are, it's going to take so long that it just won't happen. The reaction won't be able to get past the first hurdle, so the substrate will either just stay in its normal state, or it will take a very long time to turn into the product.

An enyzme helps the substrate get over this first hurdle. The lock and key theory suggests that the substrate slots into the of the enzyme, and a reaction takes place which turns the substrate into its product. The enzyme remains the same, as it is a catalyst. The product then leaves the enzyme, and the reaction has been successful.

Enzymes are very important in the body because without them reactions often wouldn't take place. Every reaction shown in the section has a corresponding enzyme which ensures that the reaction happens. Although in the catalyst will speed up the reaction in both directions, sometimes one enzyme is more appropriate for one direction than the other. In the body, if a reaction needs to go both forwards and backwards, then one enyzme may be used for the forward reaction and another for the backwards reaction.

Although enzyme structure is essential, sometimes two different enzymes, each with slightly different structures, can catalyse the same reaction. This usually means that they catalyse the reaction in a different way. These are known as isoenzymes, and although their genetic coding (and therefore their structures) are different, they are capable of speeding up the same reaction.

Deiodinases - National Academy of Hypothyroidism

Part F Questions:
Q1.) Summarize the effect of ion concentration on enzyme activity
1.) Ion concentration decreases the frequency of enzyme-catalyzed reaction.

Important Factors That Influence Enzyme Activity - Buzzle

Personal Enzyme Catalysis Experiment Purpose: The purpose of this lab is to investigate the effect of an environmental variable on the catalytic function of an enzyme Enzyme Used: Protease Rate of Change Graph Substrate Concentration Time (30 second Intervals) ml
O2 Rate of Change for Control ml
O2 Time (30 second intervals) Rate of Change for Enzyme Concentration ml
O2 Time (30 second intervals) Rate of Change for Temperature Change ml
O2 Time (30 second intervals) Time (30 second intervals) ml
O2 Rate of Change for pH Barrier Rate of Change for Substrate Concentration ml
O2 Time (30 second intervals) Where is Protease found: Protease can be found within household items such as detergents or meat tenderizers.

Important Factors That Influence Enzyme Activity

Part E Questions:
Q1.) Summarize the effect of substrate concentration on enzyme activity.
1.) The higher the substrate concentration is, the faster the reaction is supposed to take place.