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Biology Question 102 – NEET-UG 2024

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Lecithin, a small molecular weight organic compound found in living tissues, is an example of:

Recall the major classes of organic compounds found in living tissues, such as lipids, carbohydrates, proteins, and nucleic acids.

Step 1: Identify the nature of Lecithin✦ Active

Lecithin is a generic term for a group of yellow-brownish fatty substances that occur in animal and plant tissues. It is specifically a type of lipid.

Step 2: Recall the definition of Phospholipids○ Expand

Phospholipids are a class of lipids that are a major component of all cell membranes. They are composed of a hydrophilic head (containing a phosphate group) and two hydrophobic fatty acid tails.

💡 Teacher's Secret Hint

Remember that the presence of a phosphate group is a key characteristic of phospholipids.

Step 3: Match Lecithin to its class○ Expand

Since lecithin (e.g., phosphatidylcholine) contains a phosphate group, a glycerol backbone, and fatty acid chains, it fits the definition of a phospholipid.

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