Proteins are polymers of amino acids. Each amino acid contains an amino group (-NH2), a carboxyl group (-COOH), a hydrogen atom, and a side chain (R-group) attached to a central alpha carbon. The nitrogen atom is a defining component of the amino group. Carbohydrates, such as sugars and starches, are primarily composed of carbon, hydrogen, and oxygen atoms, often in a 1:2:1 ratio for H:O.
The two elements which are present in proteins but generally absent in carbohydrates are
Asked in UPSC CISF AC EXE 2021 · Topic: Vitamins and Nutrition (Proteins: Types, Amino Acids, Sources, Functions, Deficiency Disorders)
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