David’s doctor suspects that he has diabetes. which of these should be performed by the doctor to confirm the suspicion? a dna analysis to identify genetic abnormalities a physical exam to look for tumors a study to observe david’s social behaviors a test to check david’s glucose levels

a test to check David’s glucose levels

Explanation:

Diabetes is the disease caused due to reduced secretion of insulin hormone from the pancreas. The function of insulin is to lower down the blood glucose levels by stimulating the cells to take up the glucose.  

The lower levels of insulin lead to an increased glucose level in blood. If David is suffering from diabetes, his blood glucose level would not show the normal range. He would have a higher blood glucose level due to diabetes.