Biochemical Reactions and Enzymes Quiz

What is the role of activation energy in a chemical reaction?

• It is the energy stored in the products.

• It is the energy required to start the reaction.

• It is the energy released during the reaction.

• It is the energy lost as heat.

In a chemical reaction diagram, where are the reactants typically located?

• Above the products

• On the left side

• In the middle

• On the right side

Which of the following is an example of an endothermic reaction?

• Photosynthesis

• Combustion

• Fermentation

• Cellular respiration

What happens to energy in an exothermic reaction?

• Energy is released to the surroundings.

• Energy is stored in the reactants.

• Energy is absorbed from the surroundings.

• Energy is converted into mass.

What is the primary function of enzymes in biochemical reactions?

• To increase the concentration of reactants

• To change the pH of the reaction

• To lower the activation energy required

• To increase the temperature of the reaction

How do enzymes demonstrate specificity in their function?

• They can bind to any substrate.

• They have a specific active site for specific substrates.

• They change shape to fit any substrate.

• They are not specific and can catalyze any reaction.

What is denaturation in the context of enzymes?

• The loss of an enzyme's specific shape and function

• The increase in enzyme concentration

• The binding of an enzyme to multiple substrates

• The process of enzymes becoming more active

Which factor does NOT affect the rate of enzyme activity?

• Color of the enzyme

• Substrate concentration

• pH

• Temperature

What is the effect of a competitive inhibitor on enzyme activity?

• It speeds up the reaction by binding to the substrate.

• It slows down the reaction by competing for the active site.

• It increases the enzyme's temperature.

• It changes the enzyme's pH.

How does increasing substrate concentration affect a chemical reaction?

• It changes the reaction's pH.

• It increases the reaction rate.

• It has no effect on the reaction rate.

• It decreases the reaction rate.