Question

Take a living tissue, grind it in trichloroacetic acid using pestle and mortar, and then strain it, you would obtain two fractions: acid-soluble and acid-insoluble fraction. Acid-insoluble fraction does not contain

• A. polysaccharides
• B. nucleic acids
• C. lipids
• D. flavonoids and alkaloids.

Answer 1

The correct option is D flavonoids and alkaloids.

The acid-soluble pool represents roughly the cytoplasmic composition whereas the macromolecules from cytoplasm and organelles become the acid-insoluble fraction. Together they represent the entire chemical composition of living tissues or organisms. Al! the compounds which are found in the add-soluble pool, have their molecular weights ranging from approx. 18 to around 800 daltons (Da).

The acid-insoluble fraction, has only four types of organic compounds i.e., proteins, nucleic acids, polysaccharides and lipid.

So, the correct answer is 'Flavinoids and alkaloids'.