Molecular Biology Quiz

Which is an example of a lipid?

• fat

• starch

• glucose

• hemoglobin

Which type of molecule do whales use for energy storage and insulation?

• DNA

• glucose

• fat

• starch

Which organic molecule serves as the main source of energy for cells?

• amino acids

• glucose

• proteins

• starch

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Which organic molecule would a long-distance runner most likely choose to eat before a race?

• A protein, because it builds muscle mass.

• A lipid, because it provides long-term energy storage.

• A carbohydrate, because it provides a quick release of energy.

• A protein, because it transports oxygen in the blood stream.

What are the subunits of DNA and their function?

• nucleotides that store information

• monosaccharides that provide quick energy for the cell

• lipids that store energy and provide insulation

• proteins that provide the building blocks for the structural components of organisms

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Which describes the function of the protein hemoglobin?

• to transport oxygen in the body

• to act as an enzyme during digestion

• to build and repair cells in the body

• to defend the body against bacteria and viruses

Which subunits make up the structure of all proteins?

• glucose

• amino acids

• carbohydrates

• phospholipids

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Which best describes the importance of carbohydrates to organisms?

• Carbohydrates provide storage for water molecules.

• Carbohydrates provide an immediate energy source.

• Carbohydrates provide an additional source for amino acids.

• Carbohydrates provide permanent storage for genetic information.

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Which best describes the importance of the carbohydrate cellulose to plant cells?

• Cellulose lubricates cell organelles.

• Cellulose provides enzymes for the cell.

• Cellulose provides rigidity and structure to the plant cell wall.

• Cellulose stores energy for the cell.

Enzymes belong to which group of organic compounds?

• carbohydrates

• lipids

• nucleic acids

• proteins