Question

Assertion : Palmitic acid has 20 carbon atoms including carboxyl carbon.
Reason : Arachidonic acid has 16 carbon atoms including carboxyl carbon.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (D)

Palmitic acid and arachidonic acid are simple fatty acids. A fatty acid has a carboxyl group attached to an $R$ group. The $R$ group could be a methyl $(-C{H}_3)$, or ethyl $(-C_2{H}_5)$ or higher number of $-C{H}_2$ groups ($1$ carbon to $19$ carbons). Palmitic acid has $16$ carbons atoms including carboxyl carbon. Arachidonic acid has $20$ carbon atoms including the carboxyl carbon.