The macronutrient that comprises about 50% of the dry weight of a typical bacterial cell is

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Carbon is a major component of all living organisms and is required for the formation of cellular structures including proteins, nucleic acids, and cell membranes. Bacteria are no exception and typically contain about 50% carbon in their dry weight. Nitrogen and oxygen are also important components of bacterial cells, but do not make up as much of the cell's dry weight as carbon does. Protein is a macronutrient that is important for many cellular functions, but typically makes up only about 15-20% of a bacterial cell's dry weight.

The Macronutrient That Comprises About 50% of the Dry Weight