Diabetes Mellitus Type 1 and Type 2 Practice Questions
20 free Diabetes Mellitus Type 1 and Type 2 practice questions for the NCLEX Exam. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which of the following is most consistent with a young child diagnosed with diabetes, auto-antibodies against pancreatic beta-cells, and near-complete insulin deficiency?
- A Type 2 diabetes mellitus
- B Type 1 diabetes mellitus
- C Gestational diabetes
- D Prediabetes
Correct answer: Type 1 diabetes mellitus
Type 1 diabetes is an autoimmune condition with destruction of beta cells, leading to insulin deficiency and presence of auto-antibodies.
What is the most likely condition for a middle-aged patient with obesity, family history, elevated blood glucose, but still producing insulin with poor cellular response to insulin?
- A Type 1 diabetes mellitus
- B Type 2 diabetes mellitus
- C MODY (maturity onset diabetes of the young)
- D Secondary diabetes due to pancreatitis
Correct answer: Type 2 diabetes mellitus
Type 2 diabetes is characterized by insulin resistance and relative insulin deficiency rather than absolute lack of insulin.
Which of the following is least likely to be a hallmark of type 1 diabetes at onset?
- A Rapid onset of symptoms such as polyuria, polydipsia, weight loss
- B Autoimmune-mediated beta-cell destruction
- C Commonly managed initially without insulin
- D Diagnosed often in younger individuals though can occur at any age
Correct answer: Commonly managed initially without insulin
Type 1 diabetes always requires insulin since there is little or no endogenous insulin production; managing without insulin is not typical.
Which risk factor is more strongly associated with type 2 diabetes than type 1?
- A Autoimmune markers present
- B Presence of obesity and metabolic syndrome
- C Sudden onset in a lean young child
- D Absolute insulin deficiency from diagnosis
Correct answer: Presence of obesity and metabolic syndrome
Obesity, metabolic syndrome, and insulin resistance are key risk factors for type 2 diabetes; type 1 is autoimmune in origin.
What term best describes the phase in type 2 diabetes where the pancreas initially compensates by producing more insulin but eventually fails?
- A Sustained beta-cell hyperfunction without any failure
- B Insulin resistance with eventual beta-cell exhaustion
- C Autoimmune destruction of pancreatic alpha cells
- D Absolute insulin deficiency present from the onset
Correct answer: Insulin resistance with eventual beta-cell exhaustion
In type 2 diabetes, insulin resistance leads to increased insulin production initially, but over time the beta cells fail (exhaustion) and insulin production falls.
Which statement regarding long-term complications of both types of diabetes is true?
- A Only type 2 diabetes causes microvascular complications
- B Both types cause microvascular (retinopathy, nephropathy, neuropathy) and macrovascular disease
- C Type 1 diabetes never leads to cardiovascular disease
- D Type 2 diabetes stays complication-free with lifestyle change
Correct answer: Both types cause microvascular (retinopathy, nephropathy, neuropathy) and macrovascular disease
Regardless of type, chronic hyperglycemia over time damages small and large blood vessels causing similar complications in both types.
Why is a basal-bolus insulin regimen important for a patient with type 1 diabetes?
- A It removes the need for any lifestyle or dietary changes
- B It matches insulin to physiological needs (basal plus meal bolus)
- C It allows the patient to stop monitoring blood glucose levels
- D It is required only briefly during the honeymoon phase
Correct answer: It matches insulin to physiological needs (basal plus meal bolus)
Basal-bolus insulin mimics normal insulin secretion (basal background + boluses for meals) and is standard for type 1 diabetes management.
Which of the following screening or diagnostic findings may help differentiate type 1 from type 2 diabetes?
- A Presence of C-peptide at high levels
- B Presence of islet autoantibodies
- C Body mass index >30 only
- D Age of onset >65 only
Correct answer: Presence of islet autoantibodies
Islet auto-antibodies point toward autoimmune beta-cell destruction (type 1); high C-peptide suggests longer insulin production (type 2).
A patient with type 2 diabetes asks if his condition can be reversed. The best response by the nurse is:
- A “No, the condition can never improve at all.”
- B “In some cases, weight loss and lifestyle change can lead to remission.”
- C “Only lifelong insulin therapy can cure your diabetes.”
- D “It always progresses to insulin dependence no matter what.”
Correct answer: “In some cases, weight loss and lifestyle change can lead to remission.”
Type 2 diabetes is not typically curable, but evidence shows significant weight loss and lifestyle change can induce remission in some patients. Type 1 diabetes, being autoimmune, cannot be reversed by lifestyle change.
What should the nurse suspect for a teenager presenting with polyuria, polydipsia, weight loss, high blood glucose, and ketones in urine over a few weeks?
- A Adult-onset type 2 diabetes
- B Type 1 diabetes possibly progressing to DKA
- C Type 2 diabetes with no need for insulin
- D Stress hyperglycemia only
Correct answer: Type 1 diabetes possibly progressing to DKA
Rapid onset in a younger individual with weight loss and ketones suggests type 1 diabetes and risk for diabetic ketoacidosis (DKA).
In type 2 diabetes management, what is typically first recommended?
- A Starting insulin therapy immediately at diagnosis in all cases
- B Lifestyle changes (diet, exercise) plus metformin
- C Avoiding glucose monitoring to reduce patient anxiety
- D Monitoring blood sugar only, without any active intervention
Correct answer: Lifestyle changes (diet, exercise) plus metformin
In type 2 diabetes, initial management usually involves lifestyle changes and oral medication (like metformin) before moving to insulin if needed.
Which complication is more likely to present acutely in type 1 than type 2 diabetes at onset?
- A Hypoglycemia only
- B Diabetic ketoacidosis (DKA)
- C Asymptomatic hyperglycemia for years
- D Gradual neuropathy over decades
Correct answer: Diabetic ketoacidosis (DKA)
DKA is more common in type 1 diabetes since there is absolute insulin deficiency causing rapid ketone accumulation.
What is the correct teaching point about hypoglycemia risk during exercise for a type 1 diabetic young adult?
- A No insulin or carbohydrate adjustment is ever required for exercise
- B Exercise raises insulin sensitivity and lowers glucose, so adjust insulin or snack
- C Only type 2 diabetics develop exercise-induced hypoglycemia
- D Exercise-related hypoglycemia results solely from skipping prior meals
Correct answer: Exercise raises insulin sensitivity and lowers glucose, so adjust insulin or snack
Exercise enhances insulin sensitivity and can lower blood glucose, thus patients with insulin therapy (often type 1) must adjust insulin dose or increase carbohydrate around exercise.
Which of the following statements about insulin resistance is correct?
- A It is the primary underlying mechanism driving type 1 diabetes
- B Cells respond poorly to insulin, typically seen in type 2 diabetes
- C It means the pancreas has completely stopped producing any insulin
- D It is entirely unrelated to obesity or the metabolic syndrome
Correct answer: Cells respond poorly to insulin, typically seen in type 2 diabetes
Insulin resistance means tissues fail to respond to insulin correctly and is central to the pathophysiology of type 2 diabetes.
What does an HbA1c value of 8.5% reflect in a patient newly diagnosed with diabetes?
- A Average blood glucose over past few weeks
- B Fasting glucose only
- C Average blood glucose over past 2-3 months
- D Post-prandial glucose only
Correct answer: Average blood glucose over past 2-3 months
HbA1c reflects average blood glucose over approximately the previous 2-3 months and is used in the diagnosis and management of diabetes.
Which scenario may indicate a 'honeymoon phase' in a recently diagnosed type 1 diabetic?
- A A need for steadily increasing insulin doses starting from day one
- B A temporary fall in insulin needs from residual beta-cell function
- C A period when type 2 diabetes converts to being insulin-dependent
- D A state where the patient permanently never requires insulin again
Correct answer: A temporary fall in insulin needs from residual beta-cell function
The honeymoon phase is a temporary period after type 1 diagnosis when some beta-cell function remains and insulin needs may decrease.
What is a potential risk of a sulfonylurea medication for a patient with type 2 diabetes?
- A Diabetic ketoacidosis as the predominant treatment risk
- B Hypoglycemia, especially when meals are skipped or exercise is intense
- C Absolute insulin deficiency requiring lifelong insulin replacement
- D Autoimmune destruction of pancreatic insulin-producing beta cells
Correct answer: Hypoglycemia, especially when meals are skipped or exercise is intense
Sulfonylureas stimulate insulin release, increasing risk of hypoglycemia particularly if meals are missed or exercise increases insulin sensitivity.
Which one of the following is a shared clinical symptom for both type 1 and type 2 diabetes?
- A Polydipsia, polyuria, polyphagia
- B Obesity and insulin resistance only
- C Autoantibodies present only
- D No symptoms at all until complications arise in type 1
Correct answer: Polydipsia, polyuria, polyphagia
Both types may present with the “3 Ps” (polyuria, polydipsia, polyphagia) though the timing and context differ.
What should a nurse do to prevent hypoglycemia for a hospitalized patient with type 1 diabetes who is NPO for a procedure?
- A Omit all insulin entirely until after the procedure is completed
- B Continue basal insulin, adjust prandial doses, and monitor glucose
- C Give a large bolus of rapid-acting insulin just before the procedure
- D Allow the patient full meals before the procedure despite NPO orders
Correct answer: Continue basal insulin, adjust prandial doses, and monitor glucose
Even when NPO, basal insulin is needed in type 1 patients to prevent ketoacidosis, and frequent monitoring plus adjusting prandial/bolus insulin is required.
Which statement is most accurate for a group of patients newly diagnosed with type 2 diabetes?
- A “You will never require insulin therapy at any point in the future.”
- B “Lifestyle changes plus medication may give good control; some later need insulin.”
- C “Since you still make insulin, routine blood glucose monitoring is unnecessary.”
- D “Type 2 diabetes is always a mild and essentially harmless condition.”
Correct answer: “Lifestyle changes plus medication may give good control; some later need insulin.”
Type 2 diabetes management often begins with lifestyle modifications and oral medications, but many patients eventually require insulin as beta-cell function declines.