Why is the rate of reaction greater with a higher concentration of enzyme?

Answer 1

To a point....because an enzyme speeds up the rate of a reaction.

Answer 2

Enzymes catalyse a reaction by interacting with a substrate and then releasing the products, this takes a defined amount of time depending on the enzyme and the conditions called 'turnover'. Each enzyme unit can only be bound to a set number of substrate molecules at a time. When you add more enzyme to the reaction there are more available binding sites so the probability of a substrate molecule interacting with an available enzyme active site is increased. (The speed of each substrate to product reaction is not increased but the number of those reactions occurring at once is increased).

This is only true whilst the substrate is in excess if there is not enough substrate to 'fill' all the available binding sites the reaction rate will be unchanged by adding more enzyme.

Answer 3

Enzymes accelerate the reaction rates of the substrates they act on. They do it in several ways but one example will suffice to show why that is so. Certain enzymes bind to their substrate and modify its shape, allowing it to undergo a reaction, like hydrolisis for example. That physical change in shape could have maybe exposed a weak bond in the molecule for example. Well, adding more enzymes allows this to happen more quickly. Think of it as adding more construction workers to a work site.

Answer 4

the more enzymes you have the faster the rate of the reaction BECAUSE more enzyme means more substrate-enzyme complexs will be formed and so more substrate is catalysed into product and the rate increases. its as simple as that.

more enzymes does not mean that the enzyme is working faster-that is incorrect because enymes work at a constant rate.

adding in more enzymes means you will get products faster as tehre are more active sites available to catalyse the raection-not because the enzyme itself is working faster

Answer 5

the enzymes are act as catalysts in the chemical reaction,so as the concentration of enzyme increases the rate of reaction also increases.some enymes rect very slowly when its concentration exeeds the limit.

Answer 6

These are extremely efficient natural catalysts present in all living cells. They are soluble proteins and are much better than inorganic catalysts in that they operate at much lower temperatures (e.g. 37°C) and in trace amounts and are very specific. They function like a 'lock and key':

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The surface shape of the enzyme is crucial for its specific function - the 'wrong' substrate will not fit. The shape is easily altered by extreme conditions of temperature or pH, rendering the enzyme ineffective - 'denaturing'.

Use of enzymes:

in the fermentation of glucose to form ethanol (zymaze)

in the formation of glucose and fructose from sucrose

in honey
for more ethanol for fuel
in sweets
in tenderising meat (papain)

in washing powders

in biotechnology

Examples:

Hydrolysis of sucrose

Sucrose solution in acid and a hot water bath - no result with Benedict's solution after 5 mins. Repeat at room temperature with zymase, a positive result with Benedict's is quickly produced.

Production of oxygen from hydrogen peroxide

If a piece of potato is added to hydrogen peroxide, oxygen is quickly produced.

Answer 7

by increasing enzyme concentration you are helping to lower the activation energy this is the amount of energy required to allow the reaction to occur.

Answer 8

This effect is fully explained at the following website:-

www.le.ac.uk/by/teach/biochemweb/tutorials/michment1.html