Question

ASSERTION: Palmitic acid has 20 carbon atoms including carboxyl carbon

REASON: Arachidonic acid has 16 carbon atoms including carboxyl carbon
A.Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B.Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C.Assertion is a correct but Reason is incorrect
D.Both Assertion and Reason are incorrect

Answer 1

Hint: A carboxyl group is one of several functional groups that bind to and give some properties to larger molecules. A carbon, bound to both oxygen as well as a hydroxyl group, comprises the carboxyl group.

Complete answer:
First we should know about mitochondria to answer this question. There is both a carbonyl as well as a hydroxyl group bound to the same carbon atom in the carboxyl group (symbolised as COOH), creating new properties. Carboxyl groups sometimes ionize, freeing the H as just a free proton from the hydroxyl group, with such a negative charge being borne by the remaining O.
Now, let us find the solution from the options-
- Simple fatty acids include palmitic acid or arachidonic acid.
-A fatty acid has a R group linked to a carboxyl group.
-A methyl or ethyl or higher amount of −CH2 group i.e 1 carbon to 19 carbons may be the R group. Palmitic acids have 16 atoms of carbon, namely carboxyl carbon.
- Arachidonic acid contains 20 atoms of carbon, like carboxyl carbon.

Hence, the correct answer is option (D)

Note: The first fatty acid formed throughout fatty acid synthesis is palmitic acid and is the reference to longer fatty acids. Palmitic acid is also a significant part of the body of animals.