Metabolism and Biochemical Reactions Quiz

What is the role of enzymes in metabolism?

• They slow down chemical reactions.

• They act as catalysts to speed up chemical reactions.

• They are used up in the reactions they catalyze.

• They prevent reactions from occurring.

What is an example of an anabolic reaction?

• Hydrolysis

• Photosynthesis

• Aerobic respiration

• Fermentation

What is released as a by-product of condensation reactions in anabolism?

• Oxygen

• Carbon dioxide

• Water

• Glucose

What type of process is cell respiration?

• Endergonic

• Exergonic

• Anabolic

• Photosynthetic

What is required as an input for hydrolysis reactions in catabolism?

• Oxygen

• Carbon dioxide

• Water

• Light energy

What is the role of an enzyme in a chemical reaction?

• It increases the activation energy required.

• It speeds up the reaction by lowering the activation energy.

• It consumes the substrate.

• It acts as a reactant.

What is the term used for the specific area where a substrate binds on an enzyme?

• Active site

• Binding site

• Reaction site

• Catalytic site

Which model describes an enzyme's active site fitting precisely with a substrate?

• Induced fit model

• Lock and key model

• Random fit model

• Enzyme-substrate model

What can increase the frequency of successful collisions in enzyme reactions?

• Decreasing molecular motion

• Increasing molecular motion

• Reducing thermal energy

• Lowering concentration of particles

What is denaturation in the context of enzymes?

• The enzyme becoming more active

• The enzyme losing its biological activity

• The enzyme binding more substrates

• The enzyme increasing its size