95% of the cytoplasm of RBCs is____________?
Correct answer: A. Hemoglobin
- A. Hemoglobin
- B. Enzymes
- C. Salts
- D. Other proteins
Explanation
About 95% of the dry cytoplasmic content of a red blood cell is hemoglobin, the iron-containing protein that binds and transports oxygen. Enzymes and salts are present in smaller amounts, so students may choose d by treating all non-hemoglobin proteins as the major component.
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