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Biology · BIOMOLECULES

हिन्दी

Consider the structural formulas of palmitic acid and arachidonic acid. Which of the following statements regarding the carbon counts in these fatty acids is correct?

  1. Palmitic acid contains 15 carbons including carboxyl carbon, and arachidonic acid has 19 carbons.
  2. Palmitic acid contains 16 carbons excluding the carboxyl carbon, while arachidonic acid contains 20 carbons excluding the carboxyl carbon.
  3. Palmitic acid contains 16 carbons including the carboxyl carbon, while arachidonic acid contains 20 carbons including the carboxyl carbon.
  4. Both palmitic acid and arachidonic acid contain 18 carbons but differ in degree of unsaturation.

Correct answer · Option 3

Palmitic acid contains 16 carbons including the carboxyl carbon, while arachidonic acid contains 20 carbons including the carboxyl carbon.

Explanation

Palmitic acid has 16 carbons including the carboxyl carbon (\( \text{CH}_3-(\text{CH}_2)_{14}-\text{COOH} \)), and arachidonic acid has 20 carbon atoms including the carboxyl carbon.

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