Pharmacognosy Lecture 6117: Plant Chemistry - Glycosides and Tannins Part 1
30 Questions
0 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 enzyme responsible for producing 3-deoxy-D-arabinoheptulosonate-7-phosphate?

  • EPSP Synthase
  • Chorismate Synthase
  • Shikimate Dehydrogenase
  • DAHP Synthase (correct)

    • Which molecule is a product of the Shikimic Acid pathway besides Shikimic Acid?

  • Gallic Acid (correct)
  • Trans-Cinnamic Acid
  • Phenylpyruvic Acid
  • Coumarin

    • What is the enzyme responsible for the phosphorylation of the 3rd hydroxyl group?

  • Chorismate Synthase
  • DHQ Synthase
  • Shikimate Dehydrogenase
  • Shikimate Kinase (correct)

    • Which compound is NOT a product of the Shikimic Acid pathway?

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

    What can Step 4 with Dehydroshikimic Acid in the Shikimic Acid Pathway render besides Shikimic Acid?

    <p>Gallic Acid</p> Signup and view all the answers

    Which compound belongs to Hydrolysable Tannins produced in the Shikimic Acid pathway?

    <p>Gallo Tanin</p> Signup and view all the answers

    What is the family of the Salix fragilis plant?

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

    Which compound can be obtained from the hydrolysis of salicin?

    <p>Salicyl alcohol</p> Signup and view all the answers

    What is the primary use of salicyl alcohol?

    <p>As a starting material for the synthesis of aspirin</p> Signup and view all the answers

    Who isolated salicin from the tannins of willow trees?

    <p>Johann Büchner</p> Signup and view all the answers

    What is the common name of Populus tremuloides?

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

    What is the main constituent of Poplar that is similar to salicin?

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

    Which of the following is the correct precursor molecule for triterpenes?

    <p>Farnesyl Pyrophosphate (C15PP)</p> Signup and view all the answers

    What is the primary difference between lignin and lignan?

    <p>Lignin is a polymer, while lignan is a smaller, biologically active molecule</p> Signup and view all the answers

    What is the role of squalene in the biosynthesis of natural compounds?

    <p>Squalene is the precursor for the synthesis of steroids and glycosides</p> Signup and view all the answers

    What is the function of phytol in plants?

    <p>Phytol is a precursor for the synthesis of gibberellins, plant growth hormones</p> Signup and view all the answers

    What is the role of carotenoids in plants?

    <p>Carotenoids are pigments that can act as both oxidants and antioxidants in plants</p> Signup and view all the answers

    What is the significance of the C20PP intermediate in the biosynthesis of natural compounds?

    <p>C20PP is the precursor for the synthesis of geranyl pyrophosphate and farnesyl pyrophosphate</p> Signup and view all the answers

    What is the most common type of glycosidic bond found in glycosides?

    <p>R-O-R' (O-glycosides)</p> Signup and view all the answers

    Which form of glycosides is found in plants?

    <p>β-glycosides</p> Signup and view all the answers

    Which enzyme specifically targets the β forms of glycosides for hydrolysis?

    <p>Both myrosin and emulsin</p> Signup and view all the answers

    Which family of plants does the enzyme myrosin come from?

    <p>Brassicaceae (cabbage family)</p> Signup and view all the answers

    What is the aglycone portion of the glycoside amygdalin?

    <p>Benzaldehyde and cyanide (HCN)</p> Signup and view all the answers

    Which of the following pathways is involved in the formation of glycosides with aromatic amino acids?

    <p>Shikimic acid pathway</p> Signup and view all the answers

    What is the primary function of the glycone portion in a glycoside?

    <p>To increase the solubility of the glycoside</p> Signup and view all the answers

    Which of the following is NOT a possible aglycone component in a glycoside?

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

    Which of the following statements about glycosides is true?

    <p>The aglycone portion of a glycoside is responsible for its bioactivity</p> Signup and view all the answers

    What is the term used to refer to the aglycone portion of a glycoside when it is a terpene or terpenoid?

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

    Which of the following pathways is involved in the biosynthesis of glycosides?

    <p>All of the above</p> Signup and view all the answers

    Which of the following statements about glycosides is FALSE?

    <p>Glycosides are always bioactive compounds</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser