Enzyme classifications
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Questions and Answers

Which one of these is the nucleophile in disaccharide formation?

  • Atom with lone electron pair (correct)
  • Group that will be substituted for by 'A'
  • Electron deficient atom
  • + B-X
  • Which one of these is the electrophile in disaccharide formation?

  • Atom with lone electron pair
  • Group that will be substituted for by 'A'
  • Electron deficient atom
  • + B-X (correct)
  • Which one of these is the leaving group in disaccharide formation?

  • Electron deficient atom (correct)
  • Group that will be substituted for by 'A'
  • Atom with lone electron pair
  • + B-X
  • What makes an electrophile 'electron deficient'?

    <p>Electron deficient atom</p> Signup and view all the answers

    Which one of these is the nucleophile in DNA formation?

    <p>Atom with lone electron pair</p> Signup and view all the answers

    Which one of these is the electrophile in DNA formation?

    <p>Electron deficient atom</p> Signup and view all the answers

    Which arrow correctly identifies the nucleophile and electrophile in the formation of triglycerides?

    <p>Arrow A</p> Signup and view all the answers

    Which type of reaction is depicted in the image depicting lipid hydrolysis?

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

    What is the enzyme class for the specific enzyme involved in lipid hydrolysis?

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

    What is the specific enzyme involved in lipid hydrolysis?

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

    What type of reaction is depicted in the image depicting amylase hydrolysis?

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

    What is the enzyme class for the specific enzyme involved in amylase hydrolysis?

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

    What physiological process uses the last 3 reactions (lipid hydrolysis, amylase hydrolysis, and peptide bond cleavage)?

    <p>Beta oxidation</p> Signup and view all the answers

    Enzymes are classified into different classes based on their functions. Which class of enzymes catalyzes redox reactions?

    <p>EC 1</p> Signup and view all the answers

    What is the meaning of the term 'redox' in the context of enzymes?

    <p>Redox refers to reduction and oxidation</p> Signup and view all the answers

    What defines a redox reaction?

    <p>Loss of Electrons = Oxidation, Gain of Electrons = Reduction</p> Signup and view all the answers

    In the redox example of the CAC (Citric Acid Cycle), which molecule has water added to it to make malate?

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

    What are FAD/FADH2?

    <p>Flavin Adenine Dinucleotide/Flavin Adenine Dinucleotide Hydrogen</p> Signup and view all the answers

    What are NAD+/NADH?

    <p>Nicotinamide Adenine Dinucleotide/Nicotinamide Adenine Dinucleotide Hydrogen</p> Signup and view all the answers

    Which enzyme class is responsible for redox reactions?

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

    Which enzyme class is responsible for hydrolysis reactions?

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

    Which enzyme class is responsible for group transfer reactions?

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

    Which enzyme class is responsible for condensation reactions?

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

    Which enzyme class is responsible for decarboxylation/elimination reactions?

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

    Which enzyme class is responsible for dehydration/elimination reactions?

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

    Which enzyme class is responsible for hydration/addition reactions?

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

    Which enzyme class is responsible for joining molecules with the use of ATP?

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

    Study Notes

    Disaccharide Formation

    • In disaccharide formation, the nucleophile is the hydroxyl group of one monosaccharide.
    • The electrophile is the anomeric carbon of the other monosaccharide.
    • The leaving group is the hydroxyl group that was initially attached to the anomeric carbon.

    Characteristics of Electrophiles

    • An electrophile is considered "electron deficient" due to a partially positive charge or a lack of electrons.

    DNA Formation

    • In DNA formation, the nucleophile is the 3'-hydroxyl group of one nucleotide.
    • The electrophile is the 5'-phosphate group of the other nucleotide.

    Triglyceride Formation

    • The nucleophile is the hydroxyl group of glycerol, and the electrophile is the acyl group of the fatty acid.

    Lipid Hydrolysis

    • The reaction depicted in lipid hydrolysis is a hydrolysis reaction.
    • The enzyme class involved in lipid hydrolysis is hydrolases.
    • The specific enzyme involved in lipid hydrolysis is lipase.

    Amylase Hydrolysis

    • The reaction depicted in amylase hydrolysis is a hydrolysis reaction.
    • The enzyme class involved in amylase hydrolysis is hydrolases.
    • The specific enzyme involved in amylase hydrolysis is amylase.

    Physiological Process

    • The physiological process that uses lipid hydrolysis, amylase hydrolysis, and peptide bond cleavage is digestion.

    Enzyme Classification

    • Enzymes are classified into different classes based on their functions.
    • The enzyme class that catalyzes redox reactions is oxidoreductases.
    • The term "redox" in the context of enzymes refers to oxidation-reduction reactions.
    • A redox reaction is defined as a reaction involving the transfer of one or more electrons.

    Redox Reactions

    • In the redox example of the Citric Acid Cycle, water is added to fumarate to make malate.
    • FAD/FADH2 are electron carriers that facilitate redox reactions.
    • NAD+/NADH are electron carriers that facilitate redox reactions.

    Enzyme Classes

    • Oxidoreductases are responsible for catalyzing redox reactions.
    • Hydrolases are responsible for catalyzing hydrolysis reactions.
    • Transferases are responsible for catalyzing group transfer reactions.
    • Ligases are responsible for catalyzing condensation reactions.
    • Lyases are responsible for catalyzing decarboxylation/elimination reactions.
    • Isomerases are responsible for catalyzing dehydration/elimination reactions.
    • Hydratases are responsible for catalyzing hydration/addition reactions.
    • Ligases are responsible for catalyzing the joining of molecules with the use of ATP.

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    Description

    Test your knowledge on hydrolases and their role in lipid and amylase hydrolysis. Identify the molecules involved, the type of reaction depicted, the enzyme class, and the specific enzymes.

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