C1.1 Enzymes and Metabolism

Open Ended

Why are enzymes important for the interactions and interdependence of molecules in living organisms?

Multiple Choice

Which of the following best describes the role of the active site in an enzyme?

• It binds specifically to the substrate to form an enzyme-substrate complex.

• It provides energy for the reaction.

• It breaks down the enzyme itself.

• It transports molecules across membranes.

Open Ended

What are the interdependent components of metabolism?

Open Ended

In what ways do enzymes interact with other molecules?

Multiple Choice

Which of the following best describes the role of enzymes in metabolism?

• They act as catalysts to speed up chemical reactions.

• They are used up in reactions.

• They slow down metabolic processes.

• They only function outside of cells.

Open Ended

Explain the effect of enzymes on activation energy in enzyme-catalyzed reactions.

Multiple Select

Which of the following are key terms related to enzymes and metabolism?

• Enzyme-Substrate Specificity

• Active Site

• Photosynthesis

• Activation Energy

Multiple Choice

Which of the following best describes the role of enzymes in metabolic reactions?

• They are globular proteins that act as catalysts.

• They are carbohydrates that provide energy.

• They are nucleic acids that store genetic information.

• They are lipids that form cell membranes.

Multiple Select

Which statements about metabolism and enzymes are correct?

• Metabolism involves a network of chemical reactions.

• Enzymes increase the rate of metabolic reactions.

• Enzymes are permanently changed after reactions.

• Enzymes act as catalysts in metabolic reactions.

Open Ended

Explain why many different enzymes are required for metabolism in living organisms.

Multiple Choice

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

• Protein synthesis from amino acids

• Hydrolysis of starch into glucose

• Oxidation of substrates in respiration

• Digestion of macromolecules

Open Ended

Distinguish between anabolism and catabolism in metabolism.

Open Ended

Explain how enzymes are involved in both anabolic and catabolic reactions.

Multiple Choice

Which of the following best describes the difference between anabolism and catabolism?

• Anabolism breaks down complex molecules, catabolism builds them up.

• Anabolism releases energy, catabolism requires energy.

• Anabolism synthesizes complex molecules from simpler ones, catabolism breaks down complex molecules into simpler ones.

• Anabolism involves hydrolysis, catabolism involves condensation.

Multiple Select

Which of the following statements about the active site of an enzyme is/are correct?

• It is the region where substrates bind and are catalysed to products.

• It is composed of a few amino acids.

• It has a complementary shape and chemistry to the substrate.

• It is always located at the center of the enzyme.

Open Ended

Explain how enzymes catalyse a reaction.

Multiple Select

Which of the following statements about the induced fit model of enzyme activity are correct?

• The substrate induces the active site of the enzyme to change shape.

• Any substrate can enter any enzyme's active site.

• Active sites are specific to one type of substrate.

• The substrate approaches and enters the active site of the enzyme.

Multiple Choice

What is formed when the substrate fits into the active site of an enzyme?

• Enzyme-substrate complex

• Product

• Reactant

• Active site

Multiple Choice

According to collision theory, what two conditions must be met for a chemical reaction to occur when particles collide?

• Particles must have sufficient energy and correct orientation.

• Particles must be large and slow-moving.

• Particles must be in a liquid state.

• Particles must be charged.

Open Ended

How does the frequency of substrate collisions with the active site of enzymes affect the rate of reaction?

Open Ended

How do you think enzymes contribute to the interaction and interdependence of molecules in metabolism?

Multiple Choice

What is the role of the active site in an enzyme-substrate complex?

• It binds to the substrate to catalyze a reaction.

• It breaks down the enzyme.

• It provides energy for the reaction.

• It stores genetic information.