Proteins
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Questions and Answers

Which test is used to detect the presence of proteins based on the formation of a violet color?

  • Lead Sulfide Test
  • Biurets Test
  • Ninhydrin Test
  • Xanthoproteic Test (correct)
  • Which type of amino acid prefers to project into the aqueous phase due to the formation of multiple hydrogen bonds?

  • Polar Acidic Amino Acid
  • Polar Basic Amino Acid
  • Nonpolar Amino Acid
  • Polar Neutral Amino Acid (correct)
  • Which structure of proteins is determined by the sequence of amino acids?

  • Secondary Structure
  • Quaternary Structure
  • Primary Structure (correct)
  • Tertiary Structure
  • Which amino acid contains a sulfur atom in its side chain?

    <p>Methionine</p> Signup and view all the answers

    Which test is used to detect the presence of proteins based on the formation of a pink or purple color?

    <p>Ninhydrin Test</p> Signup and view all the answers

    Which test is used to detect the presence of proteins based on the formation of a yellow color?

    <p>Xanthoproteic Test</p> Signup and view all the answers

    Which amino acid contains an aromatic group in its side chain?

    <p>Phenylalanine</p> Signup and view all the answers

    Which type of amino acid is polar but neutral (uncharged) and prefers to project into the aqueous phase due to the formation of multiple hydrogen bonds?

    <p>Polar Neutral Amino Acid</p> Signup and view all the answers

    Which structure of proteins is determined by the sequence of amino acids?

    <p>Primary Structure</p> Signup and view all the answers

    Which test is used to detect the presence of proteins based on the formation of a violet color?

    <p>Biurets Test</p> Signup and view all the answers

    Which test is used to detect the presence of proteins based on the formation of a yellow color?

    <p>Xanthoproteic Test</p> Signup and view all the answers

    Which type of amino acid contains a cyclic ether carbon and an aromatic group in its side chain?

    <p>Tryptophan</p> Signup and view all the answers

    Which structure of proteins is determined by the three-dimensional folding of the polypeptide chain?

    <p>Tertiary Structure</p> Signup and view all the answers

    Which type of amino acid is polar but neutral (uncharged) and prefers to project into the aqueous phase due to the formation of multiple hydrogen bonds?

    <p>Leucine</p> Signup and view all the answers

    Which test is used to detect the presence of proteins based on the formation of a purple color when treated with ninhydrin?

    <p>Ninhydrin Test</p> Signup and view all the answers

    Which amino acid contains a heterocyclic group?

    <p>Tryptophan</p> Signup and view all the answers

    Which test for proteins involves the formation of a yellow precipitate?

    <p>Lead Sulfide Test</p> Signup and view all the answers

    Which type of amino acid is nonpolar and has a side chain that prefers to project into the aqueous phase?

    <p>Leucine</p> Signup and view all the answers

    Which structure of proteins is stabilized by disulfide bonds?

    <p>Tertiary Structure</p> Signup and view all the answers

    Which test for proteins results in a violet color upon reaction with aromatic groups?

    <p>Xanthoproteic Test</p> Signup and view all the answers

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