Living cells contain 60 - 95% water. The human body contains how much water?
Correct answer: D. 65 - 70%
- A. 60 - 65%
- B. 50 - 55%
- C. 75 - 80%
- D. 65 - 70%
Explanation
Water is the most abundant substance of living beings. The water content of actively living cells varies between 60-95%. In human beings, maximum water content is found in the embryo (90 - 95%). Water content decreases to 65-70% thereafter in adults.
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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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