Classification of Amino Acids
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Questions and Answers

What is the main function of proteins in living beings?

  • Energy storage
  • Facilitating nerve impulses
  • Building blocks of bones, muscles, cartilage, and skin (correct)
  • Supporting oxygen transport in the blood
  • Which type of amino acids cannot be produced by the human body and must be included in the diet?

  • Essential amino acids (correct)
  • Amino acids based on the nature of the side chain
  • Polar amino acids with positive charge
  • Non-polar amino acids
  • Which type of peptide contains many amino acid residues?

  • Dipeptide
  • Oligopeptide
  • Polypeptide (correct)
  • Tripeptide
  • Which of the following is NOT a function of amino acids in the organism?

    <p>Breaking down lipids</p> Signup and view all the answers

    How are peptides and proteins connected?

    <p>Amide bonds</p> Signup and view all the answers

    How many amino acids make up the proteins found in the human body?

    <p>Just 20 amino acids</p> Signup and view all the answers

    Which amino acid contains a thiol group that can form disulfide bonds?

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

    How are amino acids classified based on their polarity?

    <p>Based on whether they are non-polar, polar with positive charge, or polar with negative charge</p> Signup and view all the answers

    What type of bonds hold amino acid residues together in a peptide or a protein?

    <p>Covalent bonds</p> Signup and view all the answers

    Which organ system is responsible for largely completing protein digestion at a slightly alkaline pH?

    <p>Small intestine</p> Signup and view all the answers

    What is the primary role of pancreatic proteases like trypsin and chymotrypsin during protein digestion?

    <p>Divide proteins into short peptides</p> Signup and view all the answers

    Which type of bonds are formed when thiols are oxidized under mild conditions?

    <p>Disulfide bonds</p> Signup and view all the answers

    What is the primary purpose of heating medical supplies and instruments?

    <p>To sterilize by denaturing proteins in bacteria</p> Signup and view all the answers

    How does the body primarily dispose of surplus nitrogen after protein metabolism?

    <p>Excreting it mostly as urea</p> Signup and view all the answers

    What molecules are amino acids precursors for, among the following?

    <p>Nucleic acids</p> Signup and view all the answers

    What happens if there are deficiencies in amino acids in the diet?

    <p>The body breaks down muscle proteins to obtain them</p> Signup and view all the answers

    Which process results in amino acids being absorbed from the intestine to the blood stream?

    <p>Dipeptidases finishing off protein fragments</p> Signup and view all the answers

    What is the major end product of nitrogen metabolism in humans and mammals?

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

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