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Question

Which among the following is not a main component of the biomacromolecules?

A
Carbon
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B
Hydrogen
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C
Nitrogen
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D
Magnesium
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Solution

The correct option is D Magnesium
Proteins, carbohydrates, lipids and nucleic acids are the biomolecules. They are mainly composed of C, H, O and N which are considered as the big four elements.
Magnesium is not a component of biomacromolecules but is an essential element required for plant growth, activation of certain enzymes, binding of ribosomal units during protein synthesis, etc.

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