Enzymes and Activation Energy

What are enzymes?

• Enzymes are harmful substances that damage living organisms.

• Enzymes are biological molecules that act as catalysts and help speed up chemical reactions in living organisms.

• Enzymes are only found in plants and not in animals.

• Enzymes are inorganic molecules that have no effect on chemical reactions.

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What is activation energy?

• The energy stored in a chemical bond

• The energy required to start a chemical reaction

• Activation energy

• Energy released during a chemical reaction

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How do enzymes lower activation energy?

• Enzymes convert the reactants into products with higher energy.

• Enzymes provide an alternative pathway for the reaction with a lower energy barrier.

What is the active site of an enzyme?

• A region on the enzyme where the substrate binds and the chemical reaction takes place.

• A region on the enzyme where the inhibitor binds and the chemical reaction takes place.

• A region on the enzyme where the coenzyme binds and the chemical reaction takes place.

• A region on the enzyme where the product binds and the chemical reaction takes place.

What is the lock and key model of enzyme-substrate interaction?

• The lock and key model describes the specific interaction between an enzyme and its substrate.

• The lock and key model suggests that enzymes can only bind to one specific substrate.

• The lock and key model is based on the idea that enzymes can bind to multiple substrates simultaneously.

• The lock and key model explains how enzymes can change their shape to fit different substrates.

What factors can affect enzyme activity?

• pH, temperature, concentration of water

• Light intensity, enzyme shape, concentration of water

• Temperature, pH, substrate concentration, enzyme concentration, inhibitors or activators

• Time, pressure, enzyme size

What is denaturation of enzymes?

• Denaturation of enzymes is the process in which the enzyme becomes inactive due to normal conditions such as moderate temperature or pH.

• Denaturation of enzymes is the process in which the enzyme becomes more efficient due to extreme conditions such as high temperature or pH.

• Denaturation of enzymes is the process in which the enzyme loses its shape and function due to extreme conditions such as high temperature or pH.

• Denaturation of enzymes is the process in which the enzyme gains shape and function due to extreme conditions such as high temperature or pH.