The smallest functional unit of the kidney is – (A) Neuron (B) Alveolus (C) Nephron (D) Glomerulus Answer: (C)
Which of the following has its own DNA? (A) Lysosome (B) Ribosome (C) Mitochondria (D) Endoplasmic reticulum Answer: (C)
Which hormone is responsible for the ‘fight or flight’ response? (A) Insulin (B) Adrenaline (C) Estrogen (D) Testosterone Answer: (B)
The exchange of gases in lungs takes place in – (A) Trachea (B) Bronchi (C) Alveoli (D) Bronchioles Answer: (C)
Which part of the plant is involved in transpiration? (A) Leaf (B) Stem (C) Root (D) Seed Answer: (A)
Which is the hardest substance in the human body? (A) Bone (B) Enamel (C) Cartilage (D) Hair Answer: (B)
Which of the following is not a part of the circulatory system? (A) Heart (B) Blood (C) Lungs (D) Blood vessels Answer: (C)
Which part of the flower produces pollen? (A) Anther (B) Ovary (C) Petal (D) Sepal Answer: (A)
Which vitamin prevents night blindness? (A) Vitamin A (B) Vitamin C (C) Vitamin D (D) Vitamin K Answer: (A)
Which gland secretes digestive enzymes and hormones? (A) Liver (B) Pancreas (C) Thyroid (D) Adrenal Answer: (B)
The main function of white blood cells is – (A) Carry oxygen (B) Blood clotting (C) Fight infection (D) Transport nutrients Answer: (C)
The number of bones in the human body at birth is – (A) 206 (B) 270 (C) 256 (D) 226 Answer: (B)
Which process is used by green plants to make food? (A) Respiration (B) Transpiration (C) Photosynthesis (D) Digestion Answer: (C)
What do stomata help in? (A) Absorption of water (B) Exchange of gases (C) Pollination (D) Growth Answer: (B)
Which of the following is a water-soluble vitamin? (A) Vitamin A (B) Vitamin D (C) Vitamin E (D) Vitamin C Answer: (D)
The normal body temperature of humans in Celsius is – (A) 37°C (B) 36°C (C) 38°C (D) 35°C Answer: (A)
Which part of the body is affected by jaundice? (A) Heart (B) Liver (C) Kidney (D) Lungs Answer: (B)
The largest artery in the human body is – (A) Vena cava (B) Pulmonary artery (C) Aorta (D) Coronary artery Answer: (C)
The fluid that circulates in the lymphatic system is called – (A) Blood (B) Plasma (C) Lymph (D) Serum Answer: (C)
The living content of a cell that is surrounded by a plasma membrane is called – (A) Cytoplasm (B) Protoplasm (C) Nucleoplasm (D) Hyaloplasm Answer: (B)
Which hormone controls the development of female secondary sexual characteristics? (A) Estrogen (B) Progesterone (C) Testosterone (D) Insulin Answer: (A)
Which of the following are known as ‘suicide bags’ of the cell? (A) Nucleus (B) Ribosomes (C) Lysosomes (D) Mitochondria Answer: (C)
The longest muscle in the human body is – (A) Biceps (B) Gluteus maximus (C) Sartorius (D) Triceps Answer: (C)
Which disease is caused by deficiency of Vitamin C? (A) Pellagra (B) Beriberi (C) Rickets (D) Scurvy Answer: (D)
Which part of the brain regulates heartbeat and respiration? (A) Cerebrum (B) Medulla oblongata (C) Cerebellum (D) Thalamus Answer: (B)
Which is not a bacterial disease? (A) Typhoid (B) Tuberculosis (C) Malaria (D) Cholera Answer: (C)
A balanced diet contains – (A) All nutrients (B) Only vitamins (C) Only proteins (D) Only carbohydrates Answer: (A)
The largest internal organ in the human body is – (A) Heart (B) Brain (C) Liver (D) Kidney Answer: (C)
The average lifespan of RBCs is – (A) 60 days (B) 90 days (C) 120 days (D) 150 days Answer: (C)
Which type of blood cells are also called leucocytes? (A) RBC (B) WBC (C) Platelets (D) Plasma cells Answer: (B)
Which part of the brain is responsible for intelligence and memory? (A) Cerebellum (B) Medulla (C) Cerebrum (D) Pons Answer: (C)
Which mineral is necessary for blood clotting? (A) Iron (B) Calcium (C) Sodium (D) Zinc Answer: (B)
Which instrument is used to examine the chest? (A) Microscope (B) Thermometer (C) Stethoscope (D) Sphygmomanometer Answer: (C)
The total number of ribs in the human body is – (A) 20 (B) 22 (C) 24 (D) 26 Answer: (C)
How many cranial nerves are there in humans? (A) 10 (B) 12 (C) 14 (D) 16 Answer: (B)
Which gas is used in photosynthesis? (A) Oxygen (B) Nitrogen (C) Carbon dioxide (D) Hydrogen Answer: (C)
The deficiency of which element causes anemia? (A) Calcium (B) Iron (C) Zinc (D) Magnesium Answer: (B)
What is the main function of the large intestine? (A) Digestion (B) Absorption of water (C) Absorption of protein (D) Absorption of fat Answer: (B)
Which part of the cell helps in cellular respiration? (A) Ribosome (B) Golgi body (C) Mitochondria (D) Nucleus Answer: (C)
Which organ system controls and coordinates the body activities? (A) Circulatory (B) Respiratory (C) Nervous (D) Digestive Answer: (C)
Which part of the body breaks down toxins in alcohol? (A) Kidney (B) Liver (C) Intestine (D) Lungs Answer: (B)
Which part of the human eye is responsible for its color? (A) Retina (B) Iris (C) Cornea (D) Pupil Answer: (B)
Which plant hormone causes the bending of stem towards light? (A) Cytokinin (B) Gibberellin (C) Auxin (D) Ethylene Answer: (C)
How many bones are there in an adult human body? (A) 200 (B) 202 (C) 204 (D) 206 Answer: (D)
Which enzyme is present in tears that destroys bacteria? (A) Pepsin (B) Amylase (C) Lysozyme (D) Lipase Answer: (C)
Which of the following is a connective tissue? (A) Skin (B) Bone (C) Muscle (D) Nerve Answer: (B)
Which blood group is known as universal donor? (A) AB (B) O (C) A (D) B Answer: (B)
Which organ produces the hormone glucagon? (A) Thyroid (B) Pituitary (C) Pancreas (D) Adrenal Answer: (C)
Which disease is transmitted by the bite of a dog? (A) Plague (B) Rabies (C) Anthrax (D) Leprosy Answer: (B)
The functional and structural unit of life is – (A) Tissue (B) Organ (C) Cell (D) Organism Answer: (C)