Answer:
To test the presence of protein in the food substance which gives a blue-to-purpule colour
The substance is pure depending on which atoms bond.
They both use <span>light to energize the creation of glucose also
</span> <span>Chlorophyll is a green pigment found in most plants, algae, and
cyanobacteria that as you probably know attracts light, chloroplasts
absorb light and turn it in to a freeform of energy << this is
called photosynthesis. </span>
