Enzymes and Metabolism review Unit 3 quiz 1

What is the definition of Metabolism?

• All of the chemical reactions in an organism.

• The process of breathing in oxygen.

• The movement of muscles in the body.

• The transmission of nerve impulses.

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What are Metabolic pathways?

• Series of chemical reactions that either build complex molecules or break down complex molecules.

• A type of physical exercise that increases metabolism.

• A group of organs responsible for digestion.

• A process by which cells divide to form new cells.

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Refer to the diagram showing Substrate, Intermediate, and Product with Enzyme 1, Enzyme 2, and Enzyme 3. Which of the following best describes the role of enzymes in metabolic pathways?

• Enzymes speed up chemical reactions at each step.

• Enzymes slow down the reactions.

• Enzymes are not involved in metabolic pathways.

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Catabolic pathways are pathways that ________ by breaking down complex molecules into simpler compounds.

• release energy

• store energy

• consume water

• form polymers

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Anabolic pathways are pathways that ________ to build complicated molecules from simpler compounds.

• consume energy

• release energy

• do not require energy

• break down molecules

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Which type of metabolic pathway releases energy by breaking down complex molecules into simpler compounds?

• Catabolic Pathways

• Anabolic Pathways

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Which type of metabolic pathway consumes energy to build complicated molecules from simpler compounds?

• Catabolic Pathways

• Anabolic Pathways

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Energy: the ability to do _______.

• work

• sleep

• eat

• rest

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What does ΔG represent in the context of free energy? ΔG is the change in _________.

• free energy

• temperature

• pressure

• volume

What determines whether or not a chemical reaction occurs spontaneously?

• The temperature of the reaction

• The free energy change of reactions

• The amount of reactants

• The pressure of the system

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