Exploring the Role of Enzymes in Reactions

What type of biomolecule are enzymes?

• Carbohydrates

• Proteins

• Nucleic acids

• Lipids

In a chemical reaction, what are the substances called that are present at the beginning?

• Products

• Reactants

• Catalysts

• Enzymes

During photosynthesis, what are the main reactants?

• Oxygen and glucose

• Glucose and water

• Sunlight and oxygen

• Carbon dioxide and water

What is the term used to describe the specific fit between an enzyme and its substrate?

• Substrate model

• Enzyme-substrate complex

• Induced fit model

• Lock and key model

What is the energy required to start a reaction called?

• Activation energy

• Potential energy

• Thermal energy

• Kinetic energy

How do enzymes affect the activation energy of a reaction?

• They eliminate it

• They have no effect

• They decrease it

• They increase it

In a graph comparing reactions with and without enzymes, how is the activation energy represented?

• As a lower peak for reactions with enzymes

• As a higher peak for reactions with enzymes

• As a flat line for reactions with enzymes

• As a steeper slope for reactions with enzymes

What happens to an enzyme if its shape is altered?

• It speeds up the reaction

• It stops working

• It changes the substrate

• It becomes more efficient

What term is used to describe the change in shape of an enzyme?

• Dehydration

• Denaturation

• Deactivation

• Decomposition

Which factors can cause an enzyme to denature?

• Light and sound

• Pressure and volume

• pH and temperature

• Concentration and time