Which one of the following nutrients contains the most calories per gram?
a. vitamins
b. lipids
c. carbohydrates
d. protein

The correct option is (b) Lipids.

Further Explanation:

Certain molecules or polymers are present in all the living organisms those molecules are known as biomolecules that include protein, carbohydrate, and fats. These different molecules provide a differential amount of energy to the living system.

Proteins- are the polymers that are made up of amino acids. Amino acids are linked to each other through peptide molecules.

Carbohydrate- they are the polymers that are made up of monosaccharide to further form disaccharide and polysaccharide. The bonds present between the sugar units in the carbohydrate molecules are known as the glycosidic bond.

Lipids- they contain long chains of fatty acids. It provides high energy or calorie per gram.

Vitamin- they are just the organic molecules that are required in low quantity by the organism to sustain life. It includes vitamin b, a, d, c, k, etc.

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Answer Details:

Grade: Middle school

Chapter: Biomolecules

Subject: Biology

Keywords:

Lipids, polymers, living organism, biomolecules, carbohydrate, protein, fats, amino acids, monosaccharide, disaccharide, polysaccharide, glycosidic bond, fatty acids, energy, organic molecules  

yes

explanation:

chordata is the answer