Metabolism

What is metabolism?

• The process of breathing

• The chemical processes that occur within a living organism to maintain life

• The process of digestion

• The process of photosynthesis.

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Metabolism involves the conversion of food into energy. Which of the following is a primary component of this process?

• Oxygen

• Carbon Dioxide

• Glucose

• Nitrogen

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What does metabolism refer to?

• The breakdown of food fuels

• All chemical reactions necessary to maintain life

• Only anabolic reactions

• Only catabolic reactions

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Anabolic reactions involve the synthesis of larger molecules from smaller ones. Catabolic reactions involve ________ of complex structures into simpler ones.

• Synthesis

• Hydrolysis

• Oxidation

• Reduction

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Which of the following stages involves the breakdown of food into small molecules in the intestine?

• Anabolism

• Digestion

• Oxidative breakdown

During which stage are nutrients built into lipids, proteins, and glycogen?

• Digestion

• Anabolism

• Oxidative breakdown

In the oxidative breakdown stage, nutrients are broken down into carbon dioxide, water, and energy stored in ____.

• ATP

• Glycogen

• Lipids

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Which of the following is the first stage of digestion and metabolism?

• Anabolism

• Oxidative breakdown

• Digestion in GI tract lumen

• Krebs cycle

In Stage 2, anabolism and catabolism of nutrients form intermediates within tissue cells. Which molecule is formed from glucose during this stage?

• Glycogen

• Pyruvic acid

• Fatty acids

• Amino acids

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Stage 3 involves the oxidative breakdown of products of stage 2 in mitochondria. Fill in the blank: Some energy released is used to form ____.

• CO2

• H2O

• ATP

• NH3

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