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Questions and Answers
What is a steroid?
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?
How many carbon atoms are in the steroid core structure?
17
Which position typically has a methyl group in steroids?
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.
Cholesterol is the only known steroid found in animals.
What is the significance of the 3-OH group in the activity of steroids?
What is the significance of the 3-OH group in the activity of steroids?
What are the two main configurations of substituents on a steroid's ring system?
What are the two main configurations of substituents on a steroid's ring system?
Which steroid is an example of a gonane?
Which steroid is an example of a gonane?
Corticosteroids are derivatives of ______.
Corticosteroids are derivatives of ______.
How many optically active forms of steroids are possible?
How many optically active forms of steroids are possible?
What are the two conformations that steroids can exist in?
What are the two conformations that steroids can exist in?
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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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