Chemical Reactions and Enzymes

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy in the form of heat or light to its surroundings.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

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What enzyme is primarily active in the stomach?

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Pepsin is the enzyme that is primarily active in the stomach, functioning optimally in acidic conditions.

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What is the optimum pH for alkaline phosphatase?

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The optimum pH for alkaline phosphatase is around 9.

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What is a chemical change?

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A chemical change involves a rearrangement of the molecular structure of a substance, resulting in the formation of new substances.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What is the role of enzymes in chemical reactions?

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Enzymes act as catalysts in chemical reactions, speeding up the reaction rate without being consumed in the process.

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What factors affect enzyme activity?

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Factors that affect enzyme activity include temperature, pH, substrate concentration, and the presence of inhibitors or activators.

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What is activation energy?

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Activation energy is the minimum amount of energy required to initiate a chemical reaction.

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What is the difference between reactants and products?

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Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.