Is this correct?

Question

Enzymes act by lowering the activation energy of a reaction. What does this mean?

I answered that It mean that Enzymes reduce the rate of reaction..

Is that correct?

Answer 1

Enzymes reduce the amount of activation energy that's needed, often making reactions happen at a lower temperature than they could without an enzyme. This speeds up rate of reaction.

Answer 2

"Activation energy" is the minimum amount of energy needed to make a reaction go.
If an enzyme 'lowers' the activation energy, then less energy is needed to make the reaction occur. So that will increase the rate of the reaction. Look up the definition of "catalyst." Remember that enzymes are catalysts. It will make more sense that way.

Answer 3

I would say it increases the rate of reaction because it helps reactants come together to form product.
Enzymes work by lowering the energy of the transitional state in a chemical reaction. In other words enzymes allow more transitional states to go on to become product than would be the case in the abscence of the enzyme. Think of the transitional state on one side of a wall (an energy barrier) and the TS needs to get over that wall to become a product. The enzyme lowers the energy barrier (lowers the wall) that prevents TSs becoming
product.

Answer 4

Yes...Read on
Enzymes are proteins that catalyze (i.e. accelerate) chemical reactions. In these reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts these into different molecules, the products. Almost all processes in the 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 for a reaction and thus dramatically accelerating the rate of the reaction. By binding the transition-state conformation of the substrate/product molecules, the enzyme distorts the bound substrate(s) into their transition state form, thereby reducing the amount of energy required to complete the transition. Most natural enzymes accelerate their reaction many millions of times faster compared to the uncatalyzed reaction. 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.[1] Not all biochemical catalysts are proteins, since some RNA molecules called ribozymes can also catalyze reactions.

Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity, and activators are molecules that increase activity. Drugs and poisons are often enzyme inhibitors. Enzyme activity is also affected by temperature, 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 steak tenderizers break down long meat proteins, making them easier to chew).

Answer 5

Enzyme increase the rate of a reaction.

Answer 6

no enzimes do the opposite of that
they accelerate a reaction
http://en.wikipedia.org/wiki/Enzyme

Answer 7

yes