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16-07-2019
Biology

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Protein molecules differ from carbohydrate or fat molecules by the addition of this element.

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16-07-2019

Answer:

Nitrogen

Explanation:

The molecules of fats and carbohydrates contain mainly C, H, and O.

Proteins consist of long chains of amino acids, which contain NH₂ groups.

Thus, proteins contain C, H, O, and N.

The additional element is nitrogen.

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