Biology Important MCQs (Document Form)
Instructions: Read each question carefully and select the correct option. Answers are provided below each
question.
1. What is the powerhouse of the cell? A) Nucleus B) Mitochondria C) Ribosome D) Endoplasmic
Reticulum Answer: B) Mitochondria
2. DNA stands for? A) Deoxyribonucleic Acid B) Deoxyribose Nucleic Acid C) Deoxyribonitric Acid D)
None of these Answer: A) Deoxyribonucleic Acid
3. The functional unit of the kidney is? A) Nephron B) Glomerulus C) Alveoli D) Neuron Answer: A)
Nephron
4. Photosynthesis occurs in? A) Chloroplast B) Mitochondria C) Cytoplasm D) Nucleus Answer: A)
Chloroplast
5. Hemoglobin is a protein that carries? A) Oxygen B) Carbon Dioxide C) Glucose D) Enzymes Answer:
A) Oxygen
6. Which organelle is responsible for protein synthesis? A) Ribosome B) Golgi Apparatus C) Lysosome D)
Nucleus Answer: A) Ribosome
7. The basic unit of life is? A) Cell B) Tissue C) Organ D) Organism Answer: A) Cell
8. Which macromolecule is the main source of energy? A) Proteins B) Carbohydrates C) Lipids D)
Nucleic Acids Answer: B) Carbohydrates
9. Human blood groups are determined by? A) DNA B) Antigens C) Hormones D) Enzymes Answer: B)
Antigens
10. Which hormone regulates blood sugar levels? A) Insulin B) Thyroxine C) Adrenaline D) Cortisol
Answer: A) Insulin
11. The process of cell division in somatic cells is called? A) Meiosis B) Mitosis C) Fertilization D)
Replication Answer: B) Mitosis
12. Which gas is released during photosynthesis? A) Oxygen B) Carbon Dioxide C) Nitrogen D) Hydrogen
Answer: A) Oxygen
13. The largest organ in the human body is? A) Heart B) Liver C) Skin D) Lungs Answer: C) Skin
14. Which vitamin is produced in the skin under sunlight? A) Vitamin A B) Vitamin B12 C) Vitamin C D)
Vitamin D Answer: D) Vitamin D
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Instructions: Read each question carefully and select the correct option. Answers are provided below each
question.
1. What is the powerhouse of the cell? A) Nucleus B) Mitochondria C) Ribosome D) Endoplasmic
Reticulum Answer: B) Mitochondria
2. DNA stands for? A) Deoxyribonucleic Acid B) Deoxyribose Nucleic Acid C) Deoxyribonitric Acid D)
None of these Answer: A) Deoxyribonucleic Acid
3. The functional unit of the kidney is? A) Nephron B) Glomerulus C) Alveoli D) Neuron Answer: A)
Nephron
4. Photosynthesis occurs in? A) Chloroplast B) Mitochondria C) Cytoplasm D) Nucleus Answer: A)
Chloroplast
5. Hemoglobin is a protein that carries? A) Oxygen B) Carbon Dioxide C) Glucose D) Enzymes Answer:
A) Oxygen
6. Which organelle is responsible for protein synthesis? A) Ribosome B) Golgi Apparatus C) Lysosome D)
Nucleus Answer: A) Ribosome
7. The basic unit of life is? A) Cell B) Tissue C) Organ D) Organism Answer: A) Cell
8. Which macromolecule is the main source of energy? A) Proteins B) Carbohydrates C) Lipids D)
Nucleic Acids Answer: B) Carbohydrates
9. Human blood groups are determined by? A) DNA B) Antigens C) Hormones D) Enzymes Answer: B)
Antigens
10. Which hormone regulates blood sugar levels? A) Insulin B) Thyroxine C) Adrenaline D) Cortisol
Answer: A) Insulin
11. The process of cell division in somatic cells is called? A) Meiosis B) Mitosis C) Fertilization D)
Replication Answer: B) Mitosis
12. Which gas is released during photosynthesis? A) Oxygen B) Carbon Dioxide C) Nitrogen D) Hydrogen
Answer: A) Oxygen
13. The largest organ in the human body is? A) Heart B) Liver C) Skin D) Lungs Answer: C) Skin
14. Which vitamin is produced in the skin under sunlight? A) Vitamin A B) Vitamin B12 C) Vitamin C D)
Vitamin D Answer: D) Vitamin D
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