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Four Levels of Protein Structure: Summary Questions
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<strong>Four Levels of Protein Structure:</strong> Summary Questions
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The "primary structure" of a protein refers to:
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the folds of the protein
the alpha helix and beta sheet structures
the sequence of amino acids in the protein
two proteins that function as a unit
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What part of an amino acid has properties (shape, charge) that are
different from other amino acids?
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the side chain
the backbone atoms
the secondary structure
none of the above
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The bond between two atoms of equal electronegativity is:
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polar
hydrophilic
nonpolar
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The protein shown at right has folded in water. Which of the following
statements about it is FALSE?
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amino acid 14 is most likely hydrophobic
amino acid 17 is most likely polar
amino acid 22 is most likely polar
amino acid 20 is most likely hydrophilic
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A folded protein: <img src="summaryQfolded.gif">
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Which of the following do hydrogen bonds help to stabilize?
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primary structure
secondary structure
tertiary structure
quaternary structure
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Select <u>two correct choices</u>:<br>A protein with quaternary
structure...
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is made of two or more strings of amino acids
is always composed of identical subunits
is always composed of different subunits
can be a mix of identical and different subunits
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Two amino acids that are far apart from each other in the primary
structure of a protein can be touching each other in the tertiary
structure of the same protein. Explain how this happens.
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Why do defects in protein folding cause disease?
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