Steroids: Structure and Properties
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Questions and Answers

What is a steroid?

An organic compound with four rings arranged in a specific molecular configuration.

How many carbon atoms are in the steroid core structure?

17

Which position typically has a methyl group in steroids?

  • C-10 (correct)
  • C-13 (correct)
  • C-17
  • C-5
  • Cholesterol is the only known steroid found in animals.

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

    What is the significance of the 3-OH group in the activity of steroids?

    <p>It is essential for activity.</p> Signup and view all the answers

    What are the two main configurations of substituents on a steroid's ring system?

    <p>α and β configurations.</p> Signup and view all the answers

    Which steroid is an example of a gonane?

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

    Corticosteroids are derivatives of ______.

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

    How many optically active forms of steroids are possible?

    <p>64</p> Signup and view all the answers

    What are the two conformations that steroids can exist in?

    <p>Chair form and boat form.</p> Signup and view all the answers

    Study Notes

    Steroids

    • Steroids are a class of organic compounds with a characteristic molecular structure consisting of four fused rings.
    • The core structure of a steroid has 17 carbon atoms.
    • Steroids typically have a methyl group at the 10th position.
    • Cholesterol is a prominent steroid in animals, but other steroids are also present.
    • The 3-OH group is crucial in the biological activity of steroids. It impacts their interactions with receptors and enzymes.
    • The two main configurations of substituents on a steroid's ring system are cis and trans.
    • Testosterone is an example of a gonane.
    • Corticosteroids are derivatives of pregnane.
    • There are 2^8 = 256 optically active forms of steroids possible.
    • Steroids can exist in chair and boat conformations.

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    Chapter 2 - Steroids PDF

    Description

    Explore the fascinating world of steroids, focusing on their unique organic structures and key features. This quiz delves into the steroid core, numbering system, and the impact of stereochemistry on biological activity. Test your knowledge on the properties and variations of steroid compounds.

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