A substance that has no specific volume changes to a substance that has a specific volume.
Answer:
saturated fats
Explanation:
bcoz it is solid at room temperature and does not have double bonds between carbons
It functions to maintain the proper pressure within the plant cells to provide structure
Answer:
the unknown substance is a protein
Explanation:
The biuret test is one of the tests for proteins. It can be used to detect peptide linkages. The biuret test is carried out in an alkaline solution. A coordination complex is formed leading to the appearance of a violet color.
Summarily, the biuret method is a colorimetric technique used to test for proteins and peptides. It involves the formation of a purple (violet) complex of Copper salts in alkaline solution.
Hence when the biuret reagent is added to an unknown substance and it turns purple, the unknown substance is a protein