Question Details

This is an example of derived lipids

Options

A

Carotenoids

B

Terpenes

C

Steroids

D

All of the above

Correct Answer :

All of the above

Solution :

The correct answer is All of the above.

To understand why all the given choices are derived lipids, we must look at the classification of lipids based on their chemical structure and composition:

1. Simple Lipids: These are esters of fatty acids with various alcohols (e.g., fats, oils, and waxes).
2. Compound (or Complex) Lipids: These are esters of fatty acids containing groups in addition to an alcohol and a fatty acid (e.g., phospholipids, glycolipids).
3. Derived Lipids: These are substances derived from simple and compound lipids by hydrolysis, or they are compounds that possess the general physical characteristics of lipids and are associated with them in nature. This group includes hydrocarbons, fatty acids, alcohols, sterols, and isoprenoids.

Let's examine each of the options in detail:

Steroids: These are derived lipids characterized by a carbon skeleton with four fused rings (the cyclopentanoperhydrophenanthrene nucleus). They do not contain fatty acids but are grouped with lipids because they are hydrophobic and insoluble in water. Common examples include cholesterol, bile acids, and steroid hormones.
Terpenes: These are a large and diverse class of organic compounds derived biosynthetically from units of isoprene, which has the molecular formula C5H8. Since they share the solubility properties of lipids and are biosynthetic relatives, they are classified under derived lipids.
Carotenoids: These are tetraterpenes (containing 40 carbon atoms) made of eight isoprene units. They are organic pigments found in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms. Because they are structurally a subclass of terpenes, they also fall under the category of derived lipids.

Since steroids, terpenes, and carotenoids all belong to the class of derived lipids, the option "All of the above" is the correct choice.

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