_ forms almost three-fourth of the body by weight.
Correct answer: A. Water
- A. Water
- B. Protein
- C. Carbohydrates
- D. Lipids
Explanation
Water (Option A) forms almost three-fourths of the body by weight. The human body is composed of a significant amount of water, which plays a crucial role in various physiological processes and is a major component of cells and tissues. Carbohydrates (Option C), proteins (Option B), and lipids (Option D) make up a smaller proportion of the body by weight compared to water.
This question appeared on the UHS MDCAT 2023 paper, which you can sit online with every answer explained.
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About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
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