Carbohydrates are organic molecules and contain three elements:
Correct answer: D. Carbon, hydrogen and oxygen
- A. Carbon, water and oxygen
- B. Carbon, Sulphur and hydrogen
- C. Carbon, calcium and hydrogen
- D. Carbon, hydrogen and oxygen
Explanation
The word carbohydrate literally means hydrated carbons. They are composed of carbon, hydrogen, and oxygen and the ratio of hydrogen and oxygen is the same as in water.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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