FST 3111 Proteins: Basic Concepts and Functions
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the elemental composition of proteins?

  • 50–55% carbon, 6–7% hydrogen, 20–23% oxygen, 12–19% nitrogen, and 0.2–3.0% sulfur (correct)
  • 50–55% nitrogen, 6–7% carbon, 20–23% oxygen, 12–19% hydrogen, and 0.2–3.0% sulfur
  • 50–55% oxygen, 6–7% nitrogen, 20–23% carbon, 12–19% sulfur, and 0.2–3.0% hydrogen
  • 50–55% hydrogen, 6–7% sulfur, 20–23% nitrogen, 12–19% carbon, and 0.2–3.0% oxygen

    • Which role do proteins play in living organisms and foods?

  • Provide structure and act as catalysts (correct)
  • Participate in gelation and increase viscosity
  • Function as emulsifiers and water bonding agents
  • Cause allergies and browning reactions

    • What are examples of fibrous proteins?

  • Actin and fibrin
  • Globular and linear polypeptide chains
  • Collagen and keratin (correct)
  • Tropomyosin and elastin

    • What is the function of food proteins?

    <p>Be easily digestible and functionally useable in food products</p> Signup and view all the answers

    What is the primary source of nitrogen in proteins?

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

    What are the functional properties of proteins?

    <p>Functioning as emulsifiers and increasing viscosity</p> Signup and view all the answers

    What are the basic structural units of proteins?

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

    Which group determines the polarity, hydrophobicity, structure, and functionality of amino acids?

    <p>R Group</p> Signup and view all the answers

    In which type of proteins are alpha-helices the main structure?

    <p>Soluble (hydrophilic) proteins</p> Signup and view all the answers

    Which class of amino acids is found more in the interiors of proteins where there is little or no access to water?

    <p>Non-polar and hydrophobic amino acids</p> Signup and view all the answers

    What type of structure is formed with internal hydrogen bonds between C=O and N-H?

    <p>Alpha-helix structure</p> Signup and view all the answers

    Which group joins amino acids in peptides?

    <p>Alpha-carboxyl group</p> Signup and view all the answers

    Which amino acid behavior is characterized by being neutral, acidic, or basic?

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

    What refers to the arrangement of protein in space?

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

    How many levels of protein structure are there?

    <p>Four levels</p> Signup and view all the answers

    Which type of proteins have a high amount of beta-sheet structure?

    <p>Insoluble (hydrophobic) proteins</p> Signup and view all the answers

    What is the elemental composition of proteins?

    <p>50–55% carbon, 6–7% hydrogen, 20–23% oxygen, 12–19% nitrogen, and 0.2–3.0% sulfur</p> Signup and view all the answers

    What are the two main structural organizations of proteins?

    <p>Globular and fibrous</p> Signup and view all the answers

    What type of proteins can be formed as a result of linear aggregation of small globular proteins?

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

    What are the functional properties of proteins?

    <p>Gelation, emulsifiers, water bonding, and browning</p> Signup and view all the answers

    What refers to the arrangement of protein in space?

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

    What role do food proteins play in food products?

    <p>Easily digestible, nontoxic, nutritionally adequate, functionally useable, and available in abundance</p> Signup and view all the answers

    What type of amino acids are generally found on the surfaces of proteins?

    <p>Charged and polar</p> Signup and view all the answers

    Which property determines the polarity, hydrophobicity, structure, and functionality of amino acids?

    <p>R-group</p> Signup and view all the answers

    What is the main structure in fibrous proteins?

    <p>Alpha-helix</p> Signup and view all the answers

    What is the primary source of nitrogen in proteins?

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

    Which class of amino acids is primarily found in the interiors of proteins where there is little or no access to water?

    <p>Non-polar and hydrophobic</p> Signup and view all the answers

    Which type of protein has a high amount of beta-sheet structure?

    <p>Insoluble (hydrophobic) proteins</p> Signup and view all the answers

    What refers to the arrangement of protein in space?

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

    What type of structure is formed with internal hydrogen bonds between C=O and N-H?

    <p>Alpha-helix</p> Signup and view all the answers

    More Like This

    Proteins: Functions, Structure, and Classification
    28 questions

    Proteins: Functions, Structure, and Classification

    DignifiedRadon avatar
    DignifiedRadon
    Proteins: Structure, Function, and Importance
    28 questions

    Proteins: Structure, Function, and Importance

    DignifiedRadon avatar
    DignifiedRadon
    Proteins
    39 questions

    Proteins

    CheapestGauss avatar
    CheapestGauss
    Proteins and Their Functions
    10 questions

    Proteins and Their Functions

    ThrillingLimerick avatar
    ThrillingLimerick
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser