LIFE SCIENCE

Detailed explanation-1: -Carbohydrates and fats generally do not contain nitrogen although some derivatives of these molecules also contain nitrogen sometimes.

Detailed explanation-2: -Lipids are composed mainly of carbon and hydrogen, but they can also contain oxygen, nitrogen, sulfur, and phosphorous.

Detailed explanation-3: -Composition of Fats The constituent fatty acids of fats typically consist of 75 to 85 percent carbon, while hydrogen and oxygen molecules account for the remainder of their composition. Like carbs, fats seldom contain nitrogen atoms.

Detailed explanation-4: -Nitrogen in the reduced form is the major component of the three most important biological macromolecular structures: (i) proteins/polypeptides, (ii) DNA and RNA, and (iii) polymers of amino sugars.