Question

CPPP which is the important component of sterol mainly stood for?
A. Cyclopentanoperhydrophenanthrene
B. Pentanoperhydrophenanthrene
C. Cycloperhydrophenanthrene
D. None of the above

Answer 1

Hint: It is a class of cyclic compounds which is the basic underlying structure of all steroid hormones.

Complete answer:
Sterols are also called steroid alcohols, which comes under the subgroup of the steroids. It is an important class of organic molecules. They are a type of lipid commonly cholesterol and occur naturally in plants, animals, and fungi, and can be also produced by some bacteria.
CPPP is the abbreviated form of Cyclopentanoperhydrophenanthrene. It is an important component of sterol. These compounds are made up of 4- cyclic compounds that are derived from steroids or sterols through degradation and saturation.

Additional information:
- The steroids are a group of naturally occurring compounds that possess lipophilic cyclopentanoperhydrophenanthrene moiety.
- Cyclopentanoperhydrophenanthrene is commonly called a sterane compound.
- An androstane skeleton of androstane is present in steranes with a side chain at carbon C-17.
- The molecule of Sterane is made up of three cyclohexane rings and one ring of cyclopentane
- The sterane structure constitutes the backbone of all sterols.
- For the presence of eukaryotic cells, these steranes are used as biomarkers sometimes.
- The common examples of cyclopentanoperhydrophenanthrene compounds nucleus are Cholesterol and its derivatives (such as progesterone, aldosterone, cortisol, and testosterone).
- The sterols are said to play important roles in the physiology of eukaryotic organisms.

So, the correct answer is ‘Cyclopentanoperhydrophenanthrene’.

          Cyclopentanoperhydrophenanthrene.

Note: The cyclohexane ring of sterane compounds consist of six carbon atoms that are not fixed rigidly in space, through the turning and twisting they are capable of interchanging the various structural arrangements in space which is called conformations. The two principal conformations of a cyclohexane ring are the chair form and boat form.