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

Answer

D. 1, 2, 3 and 4

Submitted by: Toheed Ahmed

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