English MCQ Feed

← Previous Next →

Q. Which blood group is known as the universal donor for red blood cell transfusion?

  • (A) AB positive
  • (B) A positive
  • (C) O negative
  • (D) B negative
📝 Notes
✅ Correct Answer: (C) O negative
Explanation: O negative red blood cells lack A, B, and Rh(D) antigens and are generally considered the universal donor type for red cell transfusions.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which component of blood is mainly responsible for clotting?

  • (A) Red blood cells
  • (B) White blood cells
  • (C) Platelets
  • (D) Plasma
📝 Notes
✅ Correct Answer: (C) Platelets
Explanation: Platelets help form blood clots and prevent excessive blood loss after an injury.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which part of the human respiratory system is the primary site of gas exchange?

  • (A) Trachea
  • (B) Bronchi
  • (C) Alveoli
  • (D) Larynx
📝 Notes
✅ Correct Answer: (C) Alveoli
Explanation: Alveoli are tiny air sacs surrounded by capillaries where oxygen and carbon dioxide are exchanged.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which mineral is essential for the formation of haemoglobin?

  • (A) Calcium
  • (B) Iron
  • (C) Sodium
  • (D) Potassium
📝 Notes
✅ Correct Answer: (B) Iron
Explanation: Iron is an essential component of haemoglobin, the protein that carries oxygen in red blood cells.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which part of a plant absorbs water and minerals from the soil?

  • (A) Stem
  • (B) Leaves
  • (C) Root hairs
  • (D) Flowers
📝 Notes
✅ Correct Answer: (C) Root hairs
Explanation: Root hairs increase the surface area of roots and absorb water and mineral nutrients from the soil.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which tissue transports water and minerals from roots to other parts of a plant?

  • (A) Phloem
  • (B) Xylem
  • (C) Cambium
  • (D) Epidermis
📝 Notes
✅ Correct Answer: (B) Xylem
Explanation: Xylem transports water and dissolved minerals mainly from the roots toward the aerial parts of the plant.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which tissue transports food from leaves to other parts of a plant?

  • (A) Xylem
  • (B) Phloem
  • (C) Cork
  • (D) Collenchyma
📝 Notes
✅ Correct Answer: (B) Phloem
Explanation: Phloem transports sugars and other organic nutrients produced during photosynthesis to different parts of the plant.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which gas is released as a by-product of photosynthesis?

  • (A) Carbon dioxide
  • (B) Nitrogen
  • (C) Oxygen
  • (D) Hydrogen
📝 Notes
✅ Correct Answer: (C) Oxygen
Explanation: During photosynthesis, water is split and oxygen is released as a by-product.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which organ produces bile in the human body?

  • (A) Stomach
  • (B) Liver
  • (C) Pancreas
  • (D) Gallbladder
📝 Notes
✅ Correct Answer: (B) Liver
Explanation: The liver produces bile, which helps in the digestion and absorption of fats. The gallbladder stores and concentrates bile.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

Q. Which hormone is commonly known as the emergency hormone?

  • (A) Insulin
  • (B) Adrenaline
  • (C) Thyroxine
  • (D) Estrogen
📝 Notes
✅ Correct Answer: (B) Adrenaline
Explanation: Adrenaline, also called epinephrine, prepares the body for rapid action during stressful or emergency situations.

Published by Team MCQ Buddy ⭐ 29.34K Points at 30-Aug-2026 12:00 pm in Biology

+