9.2 Lesson Chemical Reactions and ATP

Multiple Choice

Why is it important for cells to transfer energy efficiently during metabolism?

• To ensure cells have enough energy for vital functions

• To increase the size of the cell

• To slow down chemical reactions

• To prevent the cell from using ATP

Open Ended

Explain the difference between reactants and products.

Multiple Choice

Which of the following is a product in the chemical equation C6H12O6 + O2 → CO2 + H2O?

• CO2

• C6H12O6

• O2

• ATP

Multiple Choice

Which of the following best describes the law of conservation of mass in a chemical reaction?

• The total mass of reactants equals the total mass of products.

• The total number of molecules increases after the reaction.

• Energy is always absorbed in a chemical reaction.

• Atoms are destroyed during the reaction.

Multiple Select

Which of the following are reactants in the equation C6H12O6 + 6O2 → 6CO2 + 6H2O?

• C6H12O6

• O2

• CO2

• H2O

Multiple Choice

Which of the following best describes an exergonic reaction?

• A reaction that requires energy input to proceed

• A reaction that releases energy when bonds in products are formed

• A reaction where products have more energy than reactants

• A reaction that does not involve any energy change

Multiple Choice

Which statement is true about endergonic reactions?

• They release energy when bonds are formed

• They require an input of energy to start

• They occur only in the presence of oxygen

• They always produce heat as a byproduct

Multiple Choice

Which of the following statements best describes the role of ATP in cellular metabolism?

• ATP stores energy in its phosphate bonds and releases it when needed for cellular processes.

• ATP is only involved in exergonic reactions and cannot transfer energy to endergonic reactions.

• ATP is a waste product of metabolism and is not used by cells.

• ATP provides energy by breaking down glucose directly.