The exact sequence of amino acids in a polypeptide chain is called the protein's
Correct answer: D. primary structure
- A. secondary structure
- B. tertiary structure
- C. quaternary structure
- D. primary structure
Explanation
Primary structure is simply the amino acid order, dictated by the gene. It determines how the chain folds into secondary and tertiary shapes, so a single substitution can wreck the protein's function. Quaternary structure only exists when several chains assemble together.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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