Carotenoids in Nature
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Questions and Answers

What is the main source of yellow, orange, and red plant pigments?

  • Anthocyanins
  • Flavonoids
  • Chlorophyll
  • Carotenoids (correct)
  • In which organisms are carotenoids widely distributed?

  • Only plants and animals
  • Only bacteria and fungi
  • Only higher plants and animals
  • All living organisms (correct)
  • How are carotenoids obtained by animals?

  • Through photosynthesis
  • Through biosynthesis
  • Through dietary intake (correct)
  • Through cellular respiration
  • What are the two major classes of carotenoids based on their structure?

    <p>Carotenes and xanthophylls</p> Signup and view all the answers

    How many carbon atoms do most carotenoids have?

    <p>40</p> Signup and view all the answers

    Which enzyme family controls cytokine-induced peroxide levels and mediates signal transduction in mammalian cells?

    <p>Peroxiredoxins (PRXs)</p> Signup and view all the answers

    Which of the following is an example of a natural antioxidant?

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

    Which natural antioxidant is also known as Vitamin C?

    <p>Ascorbic acid</p> Signup and view all the answers

    Which of the following antioxidants can be obtained from the diet and is also known as Vitamin A precursor?

    <p>$\beta$-carotene</p> Signup and view all the answers

    Which natural antioxidant is mentioned as coexisting in a delicate balance with oxidative inputs?

    <p>$\gamma$-tocopherol</p> Signup and view all the answers

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