Question

Which of the following are the main constituents of Protoplasm?

• A. Hydrogen
• B. Carbon and Oxygen
• C. Nitrogen
• D. All of the above

Answer 1

The correct option is D All of the above

The fundamental matter of which all the living organisms are composed. It is a heterogeneous, polyphasic colloidal and a highly organized material which can generate chemical energy into biological energy. It is composed of water (75-85%), proteins (10-20%), carbohydrates (1%), lipids (2-3%) and inorganic materials (1%). Carbon, hydrogen, nitrogen and oxygen are the major elements constituting about 95% of the protoplasm. The remaining 5% consists of Ca, P, Cl, S, K, Na, Mg, I, Fe.