<span>Benedicts test is used for testing reducing sugar in urine and food samples. Biuret test is used for testing proteins in a sample. Sudar Red test is used to detect lipids in a sample. For starch The Lugol test is carried out. when Lugols iodine is added to sample to the powder it will turn deep bluish black color showing the sample contain starch. The other tests will not give positive results with starch powder.</span>
The macromolecules are defined as large molecules like lipids, proteins, and carbohydrates.
In the given data, the red color denotes hydrogen and black denotes carbon. The molecule that needs the majority of red and black color is carbohydrates.
Carbohydrates can be explained as:
- Carbohydrates are the macromolecules, generally referred to as sugar. Carbohydrates are primary nutrients of the diet along with proteins and fats.
- Carbohydrate is a biomolecule that is made up of carbon, hydrogen, and oxygen atoms. The monomeric units of carbohydrates are monosaccharides.
Thus, the correct answer is Option A.
To know more about carbohydrates, refer to the following link:
brainly.com/question/16987478
Diffusion will continue until a condition of equilibrium<span> will be reached. Ions or Molecules are equally balanced on both sides or a permeable membrane.</span>