Hello Student ,

The composition of living tissue/biomolecules can be studied by chemical analysis. The stepwise procedure is as follows

1. Living tissue is taken and grinded in trichloroacetic acid.
2. Then the mixture is strained with a cheese cloth
3. Filtrate and Retentate are obtained after straining.
4. Filtrate contains the acid solube pool - Mol Wt of biomolecules- 18-1800 Daltons . These are biomicromolecules.
5. Retentate contains Acid Insoluble pool - Mol Wt of biomolecules - >800 D. These are biomarcomolecules.

Note : Lipids are absent in biomicromolecular pool due to their non polar nature. They associate and form larger compounds.