Phenylketonuria can be used by an enzymatic deficiency or it can be presetn due to:

Phenylketonuria results from the deficiency of the enzyme phenylalanine hydroxylase

Explanation:

Phenylalanine hydroxylase converts phenylalanine to tyrosine. Deficiency of this enzyme leads to accumulation of phenylalanine leading to the disorder known as phenylketonuria

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.