Food: Our Body’s Source of Energy&StructuralMaterials BSCS Ch 7

What are the three major classes of energy-yielding nutrients?

• Vitamins, minerals, and water

• Proteins, lipids, and carbohydrates

• Nucleic acids, proteins, and carbohydrates

• Fats, sugars, and enzymes

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What element is central to all organic molecules?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon

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What is the role of proteins in the body?

• They store genetic information for cell replication.

• They are involved in building structures and facilitating chemical reactions.

• They help in the digestion of carbohydrates only.

• They are primarily used as a source of energy.

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How many amino acids cannot be synthesized by the human body and must be obtained from food?

• Twelve

• Eight

• Twenty

• Ten

Which of the following is not a function of lipids?

• Making hormones

• Serving as the primary source of energy for cells

• Storing energy

• Forming cell membranes

What does 'carbohydrate' literally mean?

• Sugar and starch

• Fuel and energy

• Energy and life

• Carbon and water

Which type of carbohydrate cannot be broken down by most organisms, including humans?

• Glucose

• Cellulose

• Glycogen

• Starch

What are nucleotides made of?

• A 5-carbon sugar, amino acids, and a fatty acid

• Amino acids, a phosphate group, and a nitrogen base

• A phosphate group, a 5-carbon sugar, and a nitrogen base

• A nitrogen base, a fatty acid, and glucose

What is the primary function of DNA?

• To serve as the primary source of energy for cells

• To store information for forming proteins

• To provide structural support to cells

• To act as a catalyst in chemical reactions

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