Diabetes Mellitus — MCQ Practice

A 12-year-old boy presents with sudden onset of increased thirst, frequent urination, and significant weight loss over the past month. His fasting blood glucose is $280,\text{mg/dL}$. Which of the following is the most likely diagnosis and its primary underlying cause?

Which of the following hormones is primarily responsible for lowering blood glucose levels by promoting glucose uptake into cells and stimulating glycogen synthesis?

A patient's HbA1c level is reported as $7.2$. Based on this value, what is the most appropriate interpretation according to standard diagnostic criteria?

Which of the following is a microvascular complication of long-standing uncontrolled Diabetes Mellitus?

Which of the following statements about Gestational Diabetes Mellitus (GDM) is correct?

A patient with Type 2 Diabetes is prescribed Metformin. What is the primary mechanism of action of Metformin in lowering blood glucose levels?