Which of the following elements are present in all proteins ?1. Carbon – McqOptions

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1.	Which of the following elements are present in all proteins ?1. Carbon 2. Hydrogen 3. Oxygen 4. Nitrogen
A.	2 and 3
B.	1,2 and 4
C.	1,3 and 4
D.	1,2,3 and 4
Answer» E.

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