For synthesis of a phospholipid, nitrogenous base is attached to _ of phosphatidic acid.
Correct answer: C. Phosphoric acid
- A. First fatty acid
- B. Second fatty acid
- C. Phosphoric acid
- D. Glycerol
Explanation
In the synthesis of a phospholipid, the nitrogenous base is attached to the phosphoric acid, which in turn is connected to the glycerol backbone at carbon no. 3. This forms the hydrophilic head of the phospholipid. The fatty acids are esterified to the other carbons of glycerol, creating the hydrophobic tails. Options A and B are incorrect because the fatty acids do not participate in nitrogenous base attachment. Option D is incorrect because, while glycerol is part of the backbone, the nitrogenous base is specifically attached via the phosphoric acid.
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