Question

Three most abundant elements in protoplasm are

• A. carbon, sodium and hydrogen
• B. carbon, hydrogen and $ {{O}_{2}} $
• C. nitrogen, carbon and $ {{O}_{2}} $
• D. carbon, phosphorus and oxygen

Answer 1

Answer: (B)

Three most abundant elements in protoplasm are C, H and $ {{O}_{2}}. $ Nitrogen is also present in protoplasm all these 4 making 90% of protoplasm. The largest constituent element of protoplasm is $ {{O}_{2}} $ by weight (63%).