Question:

Among the following, the formula of saturated fatty acid is

Updated On: Jan 23, 2024
  • $ C_{17}H_{29}COOH $
  • $ C_{17}H_{35}COOH $
  • $ C_{17}H_{31}COOH $
  • $ C_{17}H_{33}COOH $
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The Correct Option is B

Approach Solution - 1

The general formula for saturated fatty acids is $ C_nH_{2n+1}COOH. $ Among the given acids, only $ C_{17}H_{35}COOH $ satisfy this
formula, hence it is a saturated fatty acid.
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Approach Solution -2

Ans: saturated fatty acids are the ones that lack the double bonds between the carbon atoms in their hydrocarbon chains. The name suggests that the fatty acid is saturated with hydrogen atoms as there is no double bond. The general formula for a saturated fatty acid is CH3(CH2)nCOOH. In this n represent the number of carbon atoms in the chain. In the question, C17H35COOH satisfies this formula, therefore it is saturated fatty acid. 

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Concepts Used:

Biomolecules

Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life.

There are four major classes of Biomolecules –  Carbohydrates, Proteins, Nucleic acids and Lipids.

  1. Carbohydrates are chemically defined as polyhydroxy aldehydes or ketones or compounds which produce them on hydrolysis.
  2. Proteins are another class of indispensable biomolecules, which make up around 50per cent of the cellular dry weight. Proteins are polymers of amino acids arranged in the form of polypeptide chains. The structure of proteins is classified as primary, secondary, tertiary and quaternary in some cases.
  3. Nucleic acids refer to the genetic material found in the cell that carries all the hereditary information from parents to progeny. There are two types of nucleic acids namely, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The main function of nucleic acid is the transfer of genetic information and synthesis of proteins by processes known as translation and transcription.
  4. Lipids are organic substances that are insoluble in water, soluble in organic solvents, are related to fatty acids and are utilized by the living cell.