Milady Esthetics State Board Practice Test

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What is a primary component of protoplasm?

Oxygen
Water
Fat
Carbon dioxide

The correct answer is: Water

Water is a primary component of protoplasm because it plays a crucial role in maintaining the structure and function of cells. Protoplasm, which is the living substance within a cell, consists of cytoplasm and nucleoplasm. Water makes up a significant portion of protoplasm, often accounting for 70-90% of its composition. This high water content is essential for various cellular processes, including nutrient transport, waste removal, and chemical reactions necessary for life. The presence of water provides a medium for biochemical reactions and helps maintain cell turgor and shape.