The basic building block of a protein is called a(n)

Question

BlackTom AI · Accepted Answer

Consider the question about the fundamental unit that composes proteins. This is a foundational concept in biochemistry and molecular biology.
Option 1: monosaccharide. Monosaccharides are the building blocks of carbohydrates (simple sugars like glucose, fructose). They are not components of proteins, so this choice misattributes the basic unit to carbohydrates.
Option 2: amino acid. Amino acids are the correct basic units that link together via peptide bonds to form proteins. They determine a protein's structure and function, and proteins are essentially long chains of amino acids.
Option 3: keto acid. Keto acids are intermediate compounds involved in metabolism, such as in amino acid catabolism and energy metabolism. They are not the fundamental units of proteins, so this option confuses metabolic intermediates with protein subunits.
Option 4: fatty acid. Fatty acids are the building blocks of lipids (fats and oils) and membranes, not of proteins. This option mixes up lipid chemistry with protein structure, making it incorrect in this context.

The basic building block of a protein is called a(n)单项选择题

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