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Proteins: Structure and Function Lecture
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Proteins: Structure and Function Lecture

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Questions and Answers

What is the percentage of cellular dry weight constituted by proteins?

  • 70%
  • 50% (correct)
  • 90%
  • 30%
  • Who suggested the name 'proteins' to the group of organic compounds important to life?

  • Berzelius (correct)
  • Faculty of Science Helwan University
  • Dr. Michael Mounir
  • G.J.Mulder
  • What is the meaning of the Greek word 'proteios', from which the term 'protein' is derived?

  • First place (correct)
  • Structure
  • Function
  • Organic compounds
  • On what basis are proteins classified?

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

    What type of proteins have a folded structure from one subunit?

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

    What type of proteins exhibit the presence of intra-hydrogen bonding in their structure?

    <p>Secondary Proteins</p> Signup and view all the answers

    Which type of proteins consist of more than one subunit and are folded proteins?

    <p>Quaternary proteins</p> Signup and view all the answers

    What are the two functional groups present in amino acids?

    <p>Amino and carboxyl</p> Signup and view all the answers

    Which type of amino acids contain the hydroxyl group?

    <p>Hydroxyl group containing amino acids</p> Signup and view all the answers

    Which category of amino acids are subclassified into three broad categories: mono amino mono carboxylic acid, mono amino dicarboxylic acid, and di/poly amino mono carboxylic acid?

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

    Which amino acid belongs to the category of simple amino acids?

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

    Which category of amino acids contains tryptophan and histidine?

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

    Which type of proteins are involved in signaling pathways and regulation of various biological processes?

    <p>Regulatory or Hormonal proteins</p> Signup and view all the answers

    What is the general structure of an amino acid with an asymmetric and optically active alpha carbon atom?

    <p>D-amino acid</p> Signup and view all the answers

    Which category of proteins includes myosin, actin, and tubulin for muscle contraction and cell division?

    <p>Contractile proteins</p> Signup and view all the answers

    What is the classification of amino acids based on nutritional requirements?

    <p>Based on nutritional requirements</p> Signup and view all the answers

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