Chpt 8 Pre-Lecture Quiz

_____ is the sum total of all the chemical reactions in a living system.

• Metabolism

• Phosphorylation

• ATP

• Endergonic

Which of the following terms specifically describes the metabolic process of breaking down large molecules?

• Catabolism

• Metabolism

• Anabolism

• Dehydration

Which of the following statements is TRUE regarding anabolic pathways?

• They are used for digesting sugars.

• They consume energy to build up polymers from monomers.

• They release energy by breaking down polymers into monomers.

• They increase the entropy of the organism.

__________ reactions release energy.

• Endergonic

• Exergonic

Which of the following statements is true for all exergonic reactions?

• The products have more total energy than the reactants.

• The reaction proceeds with a net loss of free energy.

• The reaction goes only in a forward direction: all reactants will be converted to products.

• A net input of energy from the surroundings is required for the reactions to proceed.

When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?

• It is used to power yet more cellular work in the surroundings.

• It is captured to store energy as more heat in the system.

• It is used to generate ADP.

• It is lost to the environment.

Which of the following statements is true?

• ADP contains more potential energy than ATP.

• Following hydrolysis, ATP can give off one phosphate group and usable energy, whereas ADP cannot.

• The energy produced by ATP comes from the breaking of the bond between two phosphate groups.

• AMP and ADP contain the same amount of potential energy.

1. How does ATP participate in energy-coupling reactions?

• 1. Hydrolysis of ATP fuels endergonic reactions.

• Hydrolysis of ADP fuels endergonic reactions.

• Synthesis of ATP fuels exergonic reactions.

• 1. Synthesis of ADP fuels exergonic reactions.

Enzymes are substrate specific.

• True

• False

The area of an enzyme where the substrate binds and the chemical reaction occurs is called the passive site.

• True

• False