Chapter 21, Problem 7STP

Interpretation Introduction

Interpretation: The correct option which is not a steroid and its derivative needs to be identified.

Concept Introduction:

The steroid is categorized in the lipid. They are insoluble in water. It is used for signaling purposes. They are good for energy storage. The steroids are organic compounds containing four carbon rings.

Answer to Problem 7STP

Correct answer: Option (C) adenosine.

Explanation of Solution

Reason for correct option:

The adenosine is a nitrogenous base which is present in DNA and RNA. So it is not a steroid or steroid derivative. The special character of steroids is the fuse ring system of three cyclohexanes and one cyclopentane in a fused ring system. There are a variety of functional groups attached to the carbon rings.

Conclusion

Reasons for incorrect options:

Option (A) cholesterol is classified as the steroid, hence it is incorrect option.

Option (B) cortisol is a type of hormone which is related to the steroid. So it consider as a incorrect option.

Option (D) cholic acid it is a type of steroid acid, hence it is incorrect option.