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Question
About 98 percent of the mass of every living organism is composed of just six elements; carbon, hydrogen, nitrogen, oxygen, _____________.
About 98 percent of the mass of every living organism is composed of just six elements; carbon, hydrogen, nitrogen, oxygen, _____________.
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Solution
The correct option is B Calcium and phosphorus
Living organisms require 6 elements in large amounts. C, O, N, Ca, H and P. These elements contribute to the structural organization of living organisms. Calcium is utilized for the formation of bones and as conducting molecules. Phosphorus is an important constituent of nucleic acids and even more importantly, in ATP as the fuel source for all life.
Nitrogen is a constituent of amino acids and nitrogenous bases. Carbon as the backbone/connector for every molecule, hence life on earth is carbon-based; and Oxygen and Hydrogen as the universal solvent - water.
Calcium and phosphorus
Living organisms require 6 elements in large amounts. C, O, N, Ca, H and P. These elements contribute to the structural organization of living organisms. Calcium is utilized for the formation of bones and as conducting molecules. Phosphorus is an important constituent of nucleic acids and even more importantly, in ATP as the fuel source for all life.
Nitrogen is a constituent of amino acids and nitrogenous bases. Carbon as the backbone/connector for every molecule, hence life on earth is carbon-based; and Oxygen and Hydrogen as the universal solvent - water.
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