HUMAN PHYSIOLOGY
DIGESTION AND ABSORPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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speeds up a chemical reaction
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slows down a chemical reaction
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has no effect on a chemical reaction
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it slows dow and speeds up a chemical reaction
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Detailed explanation-1: -A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction. Catalysis is the process of adding a catalyst to facilitate a reaction.
Detailed explanation-2: -Enzymes are a form of catalysts that speed up chemical reactions by lowering the activation energy.
Detailed explanation-3: -Enzymes (and other catalysts) act by reducing the activation energy, thereby increasing the rate of reaction. The increased rate is the same in both the forward and reverse directions, since both must pass through the same transition state.
Detailed explanation-4: -Catalyst. Enzyme. Function. Catalysts are substances that increase or decrease the rate of a chemical reaction but remain unchanged. Enzymes are proteins that increase rate of chemical reactions converting substrate into product.
Detailed explanation-5: -a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.