The clinical diagnostic test for diabetes mellitus is a simple blood sugar test.

The clinical diagnostic test for diabetes mellitus is a simple blood sugar test. In diabetes, this disease can result from a number of different defects involving insulin function that presents clinically as high concentrations of glucose in blood or urine. Describe three different molecular abnormalities in cells that could cause different patients to exhibit a similar clinical picture, including the classic high concentrations of glucose in the blood and urine.