The four elements that make up 99% of all elements found in a living system are
The four elements that make up 99% of all elements found in a living system are
A. CHOS
B. CHOP
C. CHON
D. CNOP
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Correct Answer - C
Carbon, hydrogen, oxygen and nitrogen are called as big four of the cell. C is 18%, O is 65%, H is 10% and N is 2.5%. These are principal non-metal elements and form 95% of total cellular materials.
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