Question

Lipids are found in acid insoluble fraction during the analysis of chemical composition of tissues. Give the reason.
(A) It has very high molecular weight. (B) It is polymer.
(C) On grinding, the biomembranes are broken down into pieces and form insoluble
vesicles.
(D) It has low molecular weight.
​

Answer 1

(C)

On grinding cell membrane lipids are broken down which forms insoluble vesicles also called micelles.

Answer 2

Answer:

Lipids are found in the acid-insoluble fraction during the analysis of the chemical composition of tissues because, On grinding, the biomembranes are broken down into pieces, and form insoluble vesicles.

Explanation:

Lipids are of low molecular weight, unlike other macronutrients, who have high molecular weight.

So, according to the normal principle of weights, lipids are supposed to past of the acid soluble pool.

However, this doesn't happen because, upon grinding of lipid molecules, the cell membrane is crushed. The contents of the cell come out as vesicles, which are highly water-insoluble, and thus, acid-insoluble, too.

Thus, they end up in the macromolecular pool.

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