Molecular Biology Review

How do cells obtain the energy and materials necessary for the work they do?

• They release nitrogen.

• They take in nutrients.

• They move around in the body.

• They produce oxygen and carbon dioxide.

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Which is the most associated with the building and repair of cells, organelles, and tissues?

• fiber

• lipid

• sugar

• protein

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Which molecule created by plants is broken down by the human body to provide energy for its life processes?

• water

• oxygen

• glucose

• carbon dioxide

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What are the products of cellular respiration?

• oxygen and sugar

• oxygen and water

• carbon dioxide and sugar

• carbon dioxide and water

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Which best describes the primary function of carbohydrates in an animal cell?

• to provide cellular energy

• to store cellular information

• to store energy within the cell

• to provide structure to the cell membrane

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During _______________, cells break down simple food molecules and release energy.

• photosynthesis

• cellular respiration

• glycolysis

• anaerobic respriation

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What are the products of cellular respiration?

• oxygen and sugar

• oxygen and water

• carbon dioxide and sugar

• carbon dioxide and water
  

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Which statement about cells and sugar is true?

• Both animal cells and plant cells use sugar.

• Animal cells use sugar, but plant cells do not.

• Animal cells do not use sugar, but plant cells do.

• Neither animal cells nor plant cells use sugar.

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One way humans store energy is by making the molecule glycogen. Clusters of which atoms are rearranged when the body digests plant sugars to make glycogen?

• hydrogen, nitrogen, carbon

• oxygen, sulfur, carbon

• carbon, hydrogen, oxygen

• nitrogen, carbon, sulfur

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What is the primary role of DNA in molecular biology?

• To store genetic information

• To catalyze chemical reactions

• To transport molecules across the cell membrane

• To provide structural support to cells

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