FOOD CHEMISTRY
CARBOHYDRATES PROTEINS AND LIPIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Carbohydrates contain carbon; proteins do not.
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Proteins contain nitrogen; carbohydrates do not.
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Carbohydrates are biomolecules; proteins are not.
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Proteins contain covalent bonds; carbohydrates do not.
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Detailed explanation-1: -Proteins are different from fats and carbohydrates due to the presence of nitrogen, carbon, hydrogen, and oxygen in them. Carbohydrates only contain carbon, hydrogen, and oxygen whereas fats contain fatty acids which contain a carboxyl group and an alkyl group, thus containing only carbon, oxygen, and hydrogen.
Detailed explanation-2: -Carbohydrates are sugars (Saccharides) by nature. Their monomeric unit is a monosaccharide connected by a glycosidic bond. In contrast, proteins constitute amino acid residues linked together by peptide bonds. The primary elements found in carbohydrates are hydrogen, oxygen, and carbon.
Detailed explanation-3: -Proteins, carbohydrates and lipids are made from three basic molecules: carbon, hydrogen and oxygen. However, all proteins contain an element not found in carbohydrates and lipids is nitrogen. Nitrogen which is present in all amino acids (the building blocks that make up the protein chains).
Detailed explanation-4: -This view represents these molecules simply as “hydrated” carbon atom chains in which water molecules attach to each carbon atom, leading to the term “carbohydrates.” Although all carbohydrates contain carbon, hydrogen, and oxygen, there are some that also contain nitrogen, phosphorus, and/or sulfur.