Biology Quiz 15 Easy biology questions Biology Quiz Start QuizPage 1 of 15 1. What is the main function of the respiratory system? a) Digestion b) Breathing c) Circulation d) Excretion Page 2 of 15 2. Which organ pumps blood throughout the body? a) Brain b) Stomach c) Heart d) Liver Page 3 of 15 3. Where does the process of digestion begin? a) Stomach b) Mouth c) Intestine d) Esophagus Page 4 of 15 4. What is the largest organ in the human body? a) Heart b) Liver c) Skin d) Brain Page 5 of 15 5. Which type of blood vessel carries blood away from the heart? a) Veins b) Arteries c) Capillaries d) Lymphatic vessels Page 6 of 15 6. What is the main function of red blood cells? a) Fight infections b) Clot blood c) Carry oxygen d) Digest food Page 7 of 15 7. Which part of the brain controls balance and coordination? a) Cerebrum b) Cerebellum c) Brainstem d) Medulla Page 8 of 15 8. What is the basic unit of the nervous system? a) Neuron b) Muscle fiber c) Bone cell d) Blood cell Page 9 of 15 9. Which organ filters waste from the blood to form urine? a) Liver b) Kidney c) Bladder d) Pancreas Page 10 of 15 10. What substance in the blood helps to clot and stop bleeding? a) Plasma b) Platelets c) Red blood cells d) White blood cells Page 11 of 15 11. What is the main function of the large intestine? a) Absorb nutrients b) Absorb water c) Produce enzymes d) Filter toxins Page 12 of 15 12. Which hormone regulates blood sugar levels? a) Thyroxine b) Adrenaline c) Insulin d) Estrogen Page 13 of 15 13. What is the main function of the skeletal system? a) Produce blood cells b) Provide support and structure c) Regulate body temperature d) Absorb nutrients Page 14 of 15 14. Which part of the digestive system is responsible for nutrient absorption? a) Stomach b) Small intestine c) Large intestine d) Esophagus Page 15 of 15 15. Which organ produces bile to help digest fats? a) Pancreas b) Gallbladder c) Liver d) Stomach Share your love Leave a ReplyYour email address will not be published. Required fields are marked * Name * Email * Add Comment * I accept the Privacy Policy Post Comment