what do you think is the effect of enzyme concentration on the rate of reaction?

Question

biology experiment

Answer 1

Well in any enzyme catalyzed reaction you have an enzyme and a substrate (that is the substance that the enzyme acts on). So for example, if you had the enzyme amylase which digests starch your substrate would be the starch and you would test the effect of enzyme concentration on the rate of reaction by keeping all other factors including the concentration of starch the same and simply increasing the enzyme concentration.

The enzyme binds to or somehow interacts with the substrate to speed up the reaction. There are certain sites on the substrate that the enzyme will act on. So as you increase the concentration of enzymes it increases the number of successful collisions and so to a point the rate of reaction is directly proportional to enzyme concentration and the higher the concentration of the enzyme the faster the reaction.

However, at some point this will 'plateu' - that is it will 'level' or reach equilibrium where the reaction reaches its maximum rate regardless of the enzyme concentration because all the sites on the substrate are 'full' and so the excess enzyme is just floating around doing nothing because it has nothing to react with.

Hence, if you were to draw a graph of the effect of enzyme concentration on the rate of reaction with enzyme concentration on the vertical axis and rate of reaction on the horizontal axis then it would be a diagonal line going straight up through the origin until it reaches a point and then its a 'flat line'.

Answer 2

The more concentrated the enzyme the faster the reaction. Only up to a certain point though, as enzymes act as catalysts and have to have something to react with.

Answer 3

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what do you think is the effect of enzyme concentration on the rate of reaction?
biology experiment

Answer 4

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When the concentration of substrate is limiting the rate of the reaction, then adding more enzyme will have no effect on the rate of the reaction. The previous answer would be correct ONLY if the substrate is present in excess.

Answer 5

In ultra dilute concentration, the more enzyme, the faster the reaction.
The answer is the reaction is proportional to the concentraion up to a certain point.

Answer 6

"the more enzymes, the faster the reaction..." but that has a limit. The limit is the velocity of reaction between the enzyme and the substance that reacts with it. You knok if there are 10 persons trying to get into a building each second bat the gates only can let pass 20 per second the cuantity of persons that get into the building is going to increasse until 20 per second... & if there are 30 persons trying to get in each second... it doesn´t matters. Just 20 can do it each second.

Answer 7

The rate of reaction is controlled by the concentration of the enzymes that incite it. It doesn't take the presence of many enzymes to start a reaction and as catalysts they are not consumed by the reaction, but the more enzymes present the more possible reactions are allowed.

According to Wikipedia: http://en.wikipedia.org/wiki/Enzymes
"Enzymes are proteins that catalyze (i.e. accelerate) chemical reactions. In enzymatic reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts them into different molecules, the products. Almost all processes in a biological cell need enzymes in order to occur at significant rates. Since enzymes are extremely selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.

Like all catalysts, enzymes work by lowering the activation energy (Ea or ΔG‡) for a reaction, thus dramatically accelerating the rate of the reaction. Most enzyme reaction rates are millions of times faster than those of comparable uncatalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions. Although almost all enzymes are proteins, not all biochemical catalysts are enzymes, since some RNA molecules called ribozymes also catalyze reactions. Synthetic molecules called artificial enzymes also display enzyme-like catalysis.

Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g. pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (e.g., enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins, making the meat easier to chew)."

Answer 8

the enzyme concentration is directly related to the rate of reaction (as the concentration increases, the rate also increases; and same is true when the concentration decreases)

Answer 9

The more enzymes, the faster the reaction.

Answer 10

i dont think enzymes concentration affects reaction rates at all