All reactions, even exergonic, need an activation energy to happen. Enzymes provide that activation energy. Sometimes by their R groups, sometimes by stressing bonds in a molecule in their activation site and sometimes by only providing a space apart from the cytosol in their activation site for two substrates to react.
By lowering the activation energy needed to begin the reaction. An enzyme can do this by giving two substrates a protected place in the cytosol to have the reaction, stress bonds in a substrate to force a reaction, or the catalytic R groups facing into the active site of an enzyme can catalyze a reaction.
Enzymes act as catalysts in metabolic reactions. They influence the rate at which a reaction occurs and they influence the type of reaction that takes place. Some of them inhibit, or slow the reaction. Others activate, or speed up the reaction.
Enzymes help facilitate the biological reactions necessary for many things. Most importantly, enzymes provide the energy necessary for these reactions to occur.
The reaction rate increase because enzymes act as catalysts.
Enzymes increase the rate of biological reactions. They do this by providing an alternate pathway with a lower activation energy.
they are more specific and the remain unchang after the completion of the reaction
Enzyme-substrate specificity means that a substrate can fit into an enzyme similar to a key fitting into a lock. The active site of the enzyme is what determines its specificity. An enzyme can hence catalyze a reaction with a specific substrate, such as amylase catalyzing starch molecules. During these reactions, the substrate is held in a precise optimum position to create and break bonds, catalyzing the molecule.
an active site in an enzyme is the area that breaks the bond in its substrate. E.g. a maltose molecule's glycocide bond is broken by the active site in a maltase enzyme.
The concentration of the substances that react is one. The temperature is another.
I think this refers to catalysts as these are considered not to be changed by a reaction-- sometimes this true when molecules react on the surface of a catalyst bu sometimes the catalyst does get involved in the chemical reaction- but is regenerated.
It is acting as a biological catalyst.
enzyme
A biological catalyst is an enzyme. An enzyme lowers the amount of activiation energy in order for a reaction to occur, they are also reusable.
Enzymes speed up the rate of chemical reactions by lowering activation energy, and are not used up in the reaction.
Molecules that act as catalysts in biological systems are enzymes. Enzyme catalyze chemical reactions by lowering the activation energy.
It is an enzyme.
A biological catalyst increases the rate of biological processes/biological reactions. A biological catalyst (enzymes) act to lower the activation energy of a chemical reaction. Enzymes are bilogical catalysts that bind or separate substrates (chemicals the catalysts act on). the 'lock and key' model suggests that the enzyme doesn't change its form and only similarly shaped substrates can fit into the lock or cleft. it is similar to the toy children play with where you must fit the circular block into the circular hole and so on. The 'induced fit' model says thatthe enzyme molds itself around the substrate and separates or binds it from there. hope i helped!
That would be an enzyme. Also know as a biological Catalyst
Enzymes are biological catalysts. This means they speed up a chemical reaction, but are not broken down or changed by it. They lower the amount of energy required for a chemical reaction to tack place.
Enzymes are biological catalysts which cause the rate of a reaction to increase (by providing an alternate reaction pathway with a lower activation enthalpy). They are very specific to the reaction they catalyse.
A reaction catalyzed by enzyme a reaction cataly by enzyme b uncatalyzed reaction
The presence of catalysts, usually enzymes.