Which organ is responsible for filtering and excreting urea from the blood? (A) Liver (B) Kidney (C) Lungs (D) Intestine Answer: (B)
What is the role of mitochondria in the cell? (A) Protein synthesis (B) Energy production (C) Digestion (D) Cell division Answer: (B)
Which vitamin is important for blood clotting? (A) Vitamin A (B) Vitamin C (C) Vitamin D (D) Vitamin K Answer: (D)
Which of the following is a water-soluble vitamin? (A) Vitamin A (B) Vitamin D (C) Vitamin C (D) Vitamin E Answer: (C)
Which tissue connects bones at joints? (A) Tendon (B) Ligament (C) Cartilage (D) Muscle Answer: (B)
Which disease is caused due to deficiency of Vitamin A? (A) Scurvy (B) Rickets (C) Night blindness (D) Beriberi Answer: (C)
Which is the largest lymphatic organ in the human body? (A) Tonsil (B) Spleen (C) Lymph node (D) Thymus Answer: (B)
Which is the innermost layer of the skin? (A) Epidermis (B) Dermis (C) Hypodermis (D) Stratum corneum Answer: (C)
Which part of the digestive system is mainly responsible for absorption of nutrients? (A) Stomach (B) Small intestine (C) Large intestine (D) Esophagus Answer: (B)
Which organ produces bile? (A) Gallbladder (B) Pancreas (C) Liver (D) Stomach Answer: (C)
The substance stored in liver and muscles as a reserve of energy is – (A) Glucose (B) Starch (C) Glycogen (D) Cellulose Answer: (C)
Which hormone maintains the calcium balance in the blood? (A) Insulin (B) Calcitonin (C) Adrenaline (D) Glucagon Answer: (B)
The part of the brain that controls heartbeat and breathing is – (A) Cerebellum (B) Medulla oblongata (C) Hypothalamus (D) Cerebrum Answer: (B)
Which of the following carries oxygenated blood from the lungs to the heart? (A) Pulmonary artery (B) Pulmonary vein (C) Aorta (D) Vena cava Answer: (B)
The primary function of the rib cage is – (A) Support (B) Blood production (C) Protection of lungs and heart (D) Digestion Answer: (C)
What is the basic structural and functional unit of the kidney? (A) Glomerulus (B) Nephron (C) Renal cortex (D) Tubule Answer: (B)
Which type of blood vessel has valves? (A) Arteries (B) Veins (C) Capillaries (D) Arterioles Answer: (B)
The tissue that transports food in plants is – (A) Xylem (B) Phloem (C) Parenchyma (D) Collenchyma Answer: (B)
What is the term for animals that eat both plants and animals? (A) Herbivores (B) Carnivores (C) Omnivores (D) Insectivores Answer: (C)
Which hormone regulates blood pressure and salt balance? (A) Insulin (B) Cortisol (C) Aldosterone (D) Estrogen Answer: (C)
Which of the following is not a function of the skin? (A) Temperature regulation (B) Sensory reception (C) Vitamin D synthesis (D) Blood sugar regulation Answer: (D)
Which of the following is an example of a fibrous joint? (A) Skull (B) Shoulder (C) Knee (D) Elbow Answer: (A)
What type of blood cells are involved in immunity? (A) RBC (B) WBC (C) Platelets (D) Plasma cells Answer: (B)
Which of these is not part of the central nervous system? (A) Brain (B) Spinal cord (C) Nerves (D) None of these Answer: (C)
The main function of red blood cells is – (A) Blood clotting (B) Immunity (C) Transport of oxygen (D) Hormone secretion Answer: (C)
Which of the following is a carnivorous plant? (A) Lotus (B) Sunflower (C) Venus flytrap (D) Peepal Answer: (C)
Which organ system removes metabolic waste from the body? (A) Digestive (B) Respiratory (C) Excretory (D) Circulatory Answer: (C)
Which hormone increases heart rate and breathing during stress? (A) Adrenaline (B) Insulin (C) Estrogen (D) Thyroxine Answer: (A)
Which part of the cell contains chromosomes? (A) Mitochondria (B) Nucleus (C) Ribosomes (D) Golgi apparatus Answer: (B)
The outermost covering of an animal cell is – (A) Cell wall (B) Cell membrane (C) Cytoplasm (D) Plasma Answer: (B)
Which organ plays a key role in detoxifying chemicals and drugs? (A) Kidney (B) Liver (C) Spleen (D) Pancreas Answer: (B)
Which plant part is mainly responsible for reproduction? (A) Leaf (B) Root (C) Flower (D) Stem Answer: (C)
Which human organ has the ability to regenerate most efficiently? (A) Heart (B) Brain (C) Liver (D) Kidney Answer: (C)
What is the role of platelets? (A) Transport oxygen (B) Fight infection (C) Clot blood (D) Carry nutrients Answer: (C)
Which vitamin helps in absorption of iron? (A) Vitamin A (B) Vitamin C (C) Vitamin D (D) Vitamin E Answer: (B)
Which blood vessel brings deoxygenated blood to the heart? (A) Aorta (B) Pulmonary vein (C) Vena cava (D) Pulmonary artery Answer: (C)
Which one of these cells lacks a nucleus? (A) WBC (B) RBC (C) Platelet (D) Neuron Answer: (B)
Which hormone prepares the uterus for pregnancy? (A) Estrogen (B) Testosterone (C) Progesterone (D) FSH Answer: (C)
Which part of the digestive system stores bile? (A) Liver (B) Gallbladder (C) Pancreas (D) Small intestine Answer: (B)