Plant Growth Regulators Quiz
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Questions and Answers

Which of the following is a synthetic analogue of phyto-hormones?

  • Polyamines
  • 2,4-D (correct)
  • Jasmonates
  • Calcium

    • What is the role of Nitric oxide in plant growth?

  • Stimulus
  • Sensors
  • Hormones (correct)
  • Required action/s

    • How do plant hormones act?

  • At a distance without localized targets
  • At a distance but certain times localized targets (correct)
  • Only on localized targets
  • Only at a distance

    • What are the characteristics of Animal Hormones (AH) compared to Plant Hormones (PH)?

    <p>Mostly large molecules such as peptides &amp; proteins</p> Signup and view all the answers

    Which hormones are decentralized in their regulation?

    <p>Plant Hormones</p> Signup and view all the answers

    Which of the following hormones is a synthetic analogue of phyto-hormones?

    <p>2,4-D</p> Signup and view all the answers

    Which hormone is involved in many plant processes initiation?

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

    In the regulation of which hormones is the effect dependent on the interaction of other hormones?

    <p>Plant Hormones</p> Signup and view all the answers

    Which type of hormones are mostly large molecules such as peptides & proteins?

    <p>Animal Hormones</p> Signup and view all the answers

    Which hormones are synthesized either throughout the plant body or in specific locations?

    <p>Plant Hormones</p> Signup and view all the answers

    Which hormone is not a synthetic analogue of phyto-hormones?

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

    In the regulation of which hormones is the effect dependent on the interaction of other hormones?

    <p>Plant Hormones</p> Signup and view all the answers

    Which type of hormones are mostly large molecules such as peptides & proteins?

    <p>Animal Hormones</p> Signup and view all the answers

    Which hormone acts at a distance but certain times has localized targets?

    <p>Plant Hormones</p> Signup and view all the answers

    Which hormone is involved in the response of plants to stress situations?

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

    Which of the following is an example of a non-synthetic growth regulator mentioned in the text?

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

    What is the role of Jasmonates in plant growth, as per the text?

    <p>Acting as a stress response</p> Signup and view all the answers

    How do plant hormones differ from animal hormones, based on the text?

    <p>Plant hormones are mostly small molecules, while animal hormones are mostly large molecules</p> Signup and view all the answers

    In the context of plant growth, what is the sequence of events in response to a stimulus, as per the text?

    <p>Stimulus → Sensors → Hormones → Plant takes required action/s</p> Signup and view all the answers

    What is the decentralized regulation of plant hormones referred to in the text?

    <p>Regulation of plant hormones occurs at multiple locations throughout the plant body</p> Signup and view all the answers

    Study Notes

    Synthetic Analogues of Phyto-Hormones

    • Synthetic analogues imitate natural plant hormones, enhancing growth and development.
    • An example of a synthetic analogue is a growth regulator that promotes cell division.

    Role of Nitric Oxide in Plant Growth

    • Nitric oxide functions as a signaling molecule influencing processes like seed germination and root development.
    • It participates in the regulation of vascular tissue development and stress responses.

    Mechanism of Action of Plant Hormones

    • Plant hormones interact with specific receptors, triggering a cascade of physiological responses.
    • They can induce changes at the cellular level, affecting growth, development, and stress adaptation.

    Characteristics of Animal Hormones vs. Plant Hormones

    • Animal hormones often exist as larger molecules, such as peptides and proteins, while plant hormones tend to be smaller and more diverse.
    • Animal hormones usually act on specific target organs, whereas plant hormones can have systemic effects throughout the plant.

    Decentralized Regulation of Hormones

    • Some plant hormones, such as auxins and cytokinins, show decentralized regulation, affecting various plant functions in different tissues.
    • Their effects are finely tuned through interactions among multiple hormones.

    Hormones Involved in Plant Processes

    • Gibberellins play a crucial role in initiating various growth processes like seed germination and stem elongation.
    • Other hormones, like ethylene, influence growth responses during ripening and stress.

    Interaction and Regulation of Hormones

    • The effects of certain hormones, like auxins and cytokinins, depend on the specific interplay with other hormones, determining plant responses to stimuli.

    Size and Composition of Hormones

    • Most hormones categorized as peptides and proteins are large molecules, participating in signaling pathways within plants.

    Synthesis of Hormones

    • Some hormones are synthesized throughout the plant body (e.g., ethylene), while others are produced in specific locations depending on developmental conditions.

    Non-Synthetic Growth Regulators

    • Naturally occurring growth regulators, such as auxins and gibberellins, are examples of non-synthetic regulators that influence plant growth and development.

    Role of Jasmonates in Plant Growth

    • Jasmonates are key for stress response, regulating defenses against herbivores and pathogens while influencing growth and development.

    Sequence of Events in Plant Response to Stimulus

    • Plant responses typically follow a sequence: stimulus detection, hormone release, signal transduction, and physiological response.

    Decentralized Regulation of Plant Hormones

    • Decentralized regulation allows for a flexible response mechanism, with plant hormones influencing one another to adapt to various environmental conditions.

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    Description

    Test your knowledge of plant growth regulators with this quiz. Explore the synthetic analogues of phyto-hormones and other regulators like calcium, polyamines, jasmonates, nitric oxide, and malate. See how plants respond to these regulators and enhance your understanding of plant growth processes.

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