Each description below at left represents a possible major basis for a particular level of protein structure. Match each of these descriptions with the correct protein structural level, by selecting from the drop-down menus (not all options will be used, but those that are will be used only once). [ Choose ] quaternary structure secondary structure tertiary structure resonance within the peptide group presence of residues with aliphatic and aromatic side chains in the primary sequence of a single polypeptide tertiary structure
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Match the following levels of protein structure with their appropriate definition or description: This level of structure occurs when multiple subunits - each an independent polypeptide chain - combine by non-covalent interactions to make a functional protein. This level of structure is a listing of amino acids in order from amino to carboxyl terminus. This level of structure is maintained by interactions between atoms found in the side-chains ("R-groups") of amino acids. This level of structure is composed of either alpha-helices or beta-sheets. Which of the following statements is TRUE regarding bonds in polypeptides? Select one: a. Double bonds stabilize secondary structures. b. The alpha carbon bonds are all polar. c. The double bond between C=N leads to a trans conformation. d. Peptide bonds allow free rotation of each amino acid relative to the others.
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Match the descriptions with the appropriate level of protein structure Premise Response folded large protein that consists of a single polypeptide chain with four discrete domains tertiary 2 multi-subunit fibrous protein quaternary antiparallel beta sheet within a globular protein secondary several amino acids linked through covalent bonds but with no interactions between side chains primary
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Describe the secondary structure of proteins.
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