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Biology · BIOMOLECULES

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Consider the structural formulas of palmitic acid and arachidonic acid. What is the total number of carbon atoms present in palmitic acid and arachidonic acid, respectively, including the carboxyl carbons?

  1. 16 and 20
  2. 15 and 19
  3. 16 and 21
  4. 18 and 20

Correct answer · Option 1

16 and 20

Explanation

Palmitic acid has 16 carbons including the carboxyl carbon (CH3-(CH2)14-COOH), and arachidonic acid has 20 carbon atoms including the carboxyl carbon.

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