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 is the largest cell in human body?
  • (A) Neuron
  • (B) Muscle cell
  • (C) Ovum
  • (D) RBC
💬 Discuss
✅ Correct Answer: (C) Ovum

Explanation: Ovum is the largest human cell.

📊 Biology
Q. Which gas is most abundant in atmosphere?
  • (A) Oxygen
  • (B) Carbon dioxide
  • (C) Nitrogen
  • (D) Hydrogen
💬 Discuss
✅ Correct Answer: (C) Nitrogen

Explanation: Nitrogen forms ~78% of atmosphere.

📊 Biology
Q. Which enzyme converts glucose to glucose-6-phosphate?
  • (A) Hexokinase
  • (B) Amylase
  • (C) Pepsin
  • (D) Lipase
💬 Discuss
✅ Correct Answer: (A) Hexokinase

Explanation: Hexokinase catalyzes first step of glycolysis.

📊 Biology
Q. Which part of flower becomes fruit?
  • (A) Ovule
  • (B) Ovary
  • (C) Anther
  • (D) Petal
💬 Discuss
✅ Correct Answer: (B) Ovary

Explanation: Ovary develops into fruit.

📊 Biology
Q. Which organism is used in fermentation?
  • (A) E. coli
  • (B) Yeast
  • (C) Algae
  • (D) Virus
💬 Discuss
✅ Correct Answer: (B) Yeast

Explanation: Yeast performs alcoholic fermentation.

📊 Biology
Q. Which type of RNA forms ribosomes?
  • (A) mRNA
  • (B) tRNA
  • (C) rRNA
  • (D) snRNA
💬 Discuss
✅ Correct Answer: (C) rRNA

Explanation: rRNA forms structural component of ribosomes.

📊 Biology
Q. Which layer protects internal organs?
  • (A) Epithelial tissue
  • (B) Muscle tissue
  • (C) Nervous tissue
  • (D) Connective tissue
💬 Discuss
✅ Correct Answer: (A) Epithelial tissue

Explanation: Epithelial tissue forms protective covering.

📊 Biology
Q. Which structure stores bile?
  • (A) Liver
  • (B) Gall bladder
  • (C) Pancreas
  • (D) Kidney
💬 Discuss
✅ Correct Answer: (B) Gall bladder

Explanation: Gall bladder stores bile.

📊 Biology
Q. Which mineral is required for hemoglobin formation?
  • (A) Calcium
  • (B) Iron
  • (C) Potassium
  • (D) Sodium
💬 Discuss
✅ Correct Answer: (B) Iron

Explanation: Iron is essential for hemoglobin synthesis.

📊 Biology
Q. Which process releases energy in cells?
  • (A) Photosynthesis
  • (B) Respiration
  • (C) Transpiration
  • (D) Digestion
💬 Discuss
✅ Correct Answer: (B) Respiration

Explanation: Respiration releases energy from glucose.

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