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Answered 2014-10-07 17:20:56

Enzymes act as catalysts. They speed up the reaction time.

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Enzymes affect the reactions in living cells by changing the....?



Enzymes influence the speed of biochemical reactions, they act as catalysts.



Enzymes act as catalysts. They speed up the reaction time.


Enzymes act as catalysts. They speed up the reaction time.



Enzymes permit and accelerate chemical reactions in living organisms.


Enzymes act as catalysts, and they almost always affect a specific reaction. Enzymes are proteinaceous biocatalysts that catalyze chemical reactions occurring in the living cell.


Enzymes act as catalysts in living systems.


Enzymes speed up chemical reactions that take place in cells. Temperature, pH, and regulatory molecules can affect the activity of enzymes.


Enzymes are organic molecules that catalyze reactions in living systems.


Enzymes are produced by living cells which catalyse the biochemical reactions.


The function of enzymes in living things is to catalyze (instigate, speed up) chemical reactions.


Enzymes lower the activation energy (or free energy of activation for the very scientific) of the chemical reactions they catalyse. The enzymes can make a reaction proceed much more quickly than it otherwise would by astronomical figures, e.g. 109 times! Enzymes don't affect the equilibrium position, but they do affect the rate.


Enzymes are substances produced by living organisms, which are designed to act as a catalyst in biochemical reactions.


Enzymes are protein molecules, produced by living cells, that function as catalysts of biochemical reactions. Without enzymes, living cells would not be able to perform the chemical reactions needed for their metabolism.


They act as a catalyst and change the speed of reactions within an organism (helping to maintain homeostasis)


affecting the rate at wich reactions occur.


Becoming part of the product after the reactions occur


Enzymes act as catalysts for reactions within the body; in other words, they lower the activation energy necessary for reactions to take place.



Enzymes are biological molecules that catalyze (i.e., increase the rates of) chemical reactions. In enzymatic reactions, the molecules at the beginning of the process, called substrates, are converted into different molecules, called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life. Since enzymes are 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. Enzymes are known to catalyze about 4,000 biochemical reactions.


Enzymes act as biological catalysts, speeding up various bodily reactions.


Enzymes are biocatalysts. They are used as catalysts for biochemical reactions in living cells.