Biology MCQ Questions with answers

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Here Important Biology MCQ questions are added which are frequently asked in almost all the examinations. You can check the correct answer of any question on clicking the show answer button. The Correct answer will be displayed below. You can share any question with your friends on whatsapp by tapping Share button.

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📊 Biology
Q. Which age group is more prone to hypertension?
  • (A) Children
  • (B) Teenagers
  • (C) Adults
  • (D) Infants
💬 Discuss
✅ Correct Answer: (C) Adults

Explanation: Risk of hypertension increases with age due to vessel stiffness and lifestyle factors.

📊 Biology
Q. Which beverage can increase blood pressure temporarily?
  • (A) Water
  • (B) Milk
  • (C) Coffee
  • (D) Juice
💬 Discuss
✅ Correct Answer: (C) Coffee

Explanation: Caffeine in coffee can cause a short-term spike in blood pressure.

📊 Biology
Q. What is isolated systolic hypertension?
  • (A) High systolic, normal diastolic
  • (B) Low systolic, high diastolic
  • (C) Both low
  • (D) Both high
💬 Discuss
✅ Correct Answer: (A) High systolic, normal diastolic

Explanation: This condition is common in older adults due to stiff arteries.

📊 Biology
Q. Which practice helps in controlling blood pressure?
  • (A) Deep breathing
  • (B) High salt intake
  • (C) Smoking
  • (D) Sedentary lifestyle
💬 Discuss
✅ Correct Answer: (A) Deep breathing

Explanation: Deep breathing reduces stress and helps lower blood pressure.

📊 Biology
Q. Which type of hypertension has an identifiable cause?
  • (A) Primary hypertension
  • (B) Secondary hypertension
  • (C) Essential hypertension
  • (D) Isolated hypertension
💬 Discuss
✅ Correct Answer: (B) Secondary hypertension

Explanation: Secondary hypertension results from an underlying condition such as kidney disease or hormonal disorders.

📊 Biology
Q. What is the effect of narrowing of arteries on blood pressure?
  • (A) Decreases pressure
  • (B) Increases pressure
  • (C) No change
  • (D) Stops blood flow
💬 Discuss
✅ Correct Answer: (B) Increases pressure

Explanation: Narrow arteries increase resistance to blood flow, raising blood pressure.

📊 Biology
Q. Which system controls short-term regulation of blood pressure?
  • (A) Digestive system
  • (B) Nervous system
  • (C) Skeletal system
  • (D) Respiratory system
💬 Discuss
✅ Correct Answer: (B) Nervous system

Explanation: The autonomic nervous system adjusts heart rate and vessel diameter for quick BP control.

📊 Biology
Q. Which receptor detects changes in blood pressure?
  • (A) Thermoreceptors
  • (B) Baroreceptors
  • (C) Photoreceptors
  • (D) Chemoreceptors
💬 Discuss
✅ Correct Answer: (B) Baroreceptors

Explanation: Baroreceptors in arteries sense pressure changes and signal the brain to adjust accordingly.

📊 Biology
Q. Which condition involves sudden drop in blood pressure on standing?
  • (A) Hypertension
  • (B) Orthostatic hypotension
  • (C) Cardiac arrest
  • (D) Stroke
💬 Discuss
✅ Correct Answer: (B) Orthostatic hypotension

Explanation: It occurs when blood pressure falls quickly upon standing, causing dizziness.

📊 Biology
Q. Which lifestyle habit is most strongly linked to hypertension?
  • (A) Reading books
  • (B) Excess salt intake
  • (C) Drinking water
  • (D) Walking daily
💬 Discuss
✅ Correct Answer: (B) Excess salt intake

Explanation: High salt consumption leads to fluid retention and increased blood pressure.

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