Metabolic Reactions Review

What is metabolism?

• The sum of all chemical reactions in a living organism.

• The breakdown of only carbohydrates and fats to produce energy.

• The physical movements that an organism makes.

• The process by which organisms respond to stimuli in their environment.

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NGSS.MS-LS1-7

Which of the following is a metabolic reaction?

• Digestion

• Muscle contraction

• Sleeping

• Thinking

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NGSS.MS-LS1-7

What is the primary role of enzymes in metabolic reactions?

• To provide the energy needed for the reactions

• To increase the temperature at which reactions occur

• To act as biological catalysts, speeding up the reactions

• To store the products of the reactions

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NGSS.MS-LS1-7

• Oxygen

• Carbon dioxide

• Glucose

• Water

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following best describes animal metabolism?

• Only involves the breakdown of food to release energy.

• Primarily involves photosynthesis to produce energy.

• Involves reactions that both build up and break down molecules to maintain life.

• Is identical to plant metabolism in every aspect.

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NGSS.MS-LS2-3

What is the main difference between plant and animal metabolism?

• Plants can perform photosynthesis, while animals cannot.

• Animals metabolize food, while plants do not.

• Plants do not have metabolism.

• Animals use sunlight directly to produce energy.

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NGSS.MS-LS1-6

What is the role of chlorophyll in photosynthesis?

• It breaks down glucose into energy.

• It captures sunlight to start the photosynthesis process.

• It transports water from the roots to the leaves.

• It absorbs carbon dioxide from the atmosphere.

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NGSS.MS-LS1-6

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What is the main purpose of cellular respiration?

• To produce oxygen for the cell

• To synthesize large molecules from smaller ones

• To convert glucose into usable energy

• To capture sunlight energy

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NGSS.MS-LS1-2

Which of the following is NOT a product of photosynthesis?

• Oxygen

• Glucose

• Carbon dioxide

• Water

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NGSS.MS-LS1-6

How do enzymes affect the activation energy of a metabolic reaction?

• They increase the activation energy required.

• They decrease the activation energy required.

• They have no effect on the activation energy.

• They provide the activation energy.