Which vitamin is essential for blood clotting? (A) Vitamin A (B) Vitamin B (C) Vitamin D (D) Vitamin K Answer: (D)
What is the basic unit of heredity? (A) Chromosome (B) DNA (C) Gene (D) Nucleus Answer: (C)
The scientific name of human beings is – (A) Homo erectus (B) Homo sapiens (C) Hominidae (D) Australopithecus Answer: (B)
Which of the following glands is both endocrine and exocrine? (A) Pituitary (B) Adrenal (C) Thyroid (D) Pancreas Answer: (D)
Which organ is involved in the excretion of carbon dioxide? (A) Liver (B) Skin (C) Lungs (D) Kidney Answer: (C)
Which of these blood cells can change shape and move out of blood vessels? (A) RBC (B) WBC (C) Platelets (D) Plasma Answer: (B)
Which plant organ is mainly responsible for transpiration? (A) Root (B) Leaf (C) Stem (D) Flower Answer: (B)
Which part of the neuron transmits signals to other neurons or muscles? (A) Dendrite (B) Nucleus (C) Axon (D) Cell body Answer: (C)
Which of these is responsible for color blindness? (A) Cornea (B) Retina (C) Rod cells (D) Cone cells Answer: (D)
Which part of the flower contains pollen? (A) Stigma (B) Ovary (C) Anther (D) Style Answer: (C)
Which nutrient helps in tissue repair and growth? (A) Fats (B) Vitamins (C) Proteins (D) Carbohydrates Answer: (C)
The enzyme responsible for digestion of proteins in the stomach is – (A) Trypsin (B) Lipase (C) Pepsin (D) Amylase Answer: (C)
Which part of the plant anchors it in the soil? (A) Leaf (B) Root (C) Stem (D) Flower Answer: (B)
The process of shedding leaves in plants is known as – (A) Germination (B) Abscission (C) Pollination (D) Transpiration Answer: (B)
Which of the following is not a component of the male reproductive system? (A) Testis (B) Urethra (C) Uterus (D) Vas deferens Answer: (C)
Which disease is caused by a mosquito bite? (A) Tuberculosis (B) Typhoid (C) Malaria (D) Cholera Answer: (C)
What is the lifespan of white blood cells? (A) 1 day (B) 2–3 weeks (C) Several months (D) Depends on type Answer: (D)
Which hormone regulates the sleep-wake cycle? (A) Melatonin (B) Cortisol (C) Estrogen (D) Prolactin Answer: (A)
Which of these is an inherited disorder? (A) Asthma (B) Thalassemia (C) Diabetes Type 2 (D) Cholera Answer: (B)
Which part of the ear converts sound vibrations into electrical signals? (A) Cochlea (B) Ear drum (C) Semicircular canals (D) Ossicles Answer: (A)
What is the normal pH range of human blood? (A) 6.2–6.8 (B) 7.35–7.45 (C) 7.9–8.2 (D) 6.8–7.0 Answer: (B)
Which blood vessel carries oxygenated blood from lungs to heart? (A) Aorta (B) Pulmonary vein (C) Pulmonary artery (D) Vena cava Answer: (B)
Which plant structure develops into the fruit? (A) Ovule (B) Anther (C) Ovary (D) Filament Answer: (C)
What is the role of the diaphragm in respiration? (A) Absorbs oxygen (B) Pumps blood (C) Contracts to expand lungs (D) Filters air Answer: (C)
Which one of these is not a function of the kidney? (A) Filtration (B) Hormone production (C) Digestion (D) Electrolyte balance Answer: (C)
Which hormone is produced by the adrenal glands? (A) Adrenaline (B) Thyroxine (C) Insulin (D) Glucagon Answer: (A)
The pigment responsible for green color in plants is – (A) Carotene (B) Xanthophyll (C) Anthocyanin (D) Chlorophyll Answer: (D)
Which tissue forms the inner lining of the body? (A) Epithelial (B) Connective (C) Muscular (D) Nervous Answer: (A)
Which part of the eye controls the size of the pupil? (A) Lens (B) Retina (C) Cornea (D) Iris Answer: (D)
The liquid part of the cytoplasm is called – (A) Nucleoplasm (B) Cytosol (C) Protoplasm (D) Vacuole Answer: (B)
Which of these cells do not divide after maturity? (A) Liver cells (B) Skin cells (C) Neurons (D) Blood cells Answer: (C)
Which vitamin promotes absorption of iron? (A) Vitamin A (B) Vitamin C (C) Vitamin D (D) Vitamin K Answer: (B)
Which connective tissue connects muscle to bone? (A) Ligament (B) Tendon (C) Cartilage (D) Fascia Answer: (B)
The longest bone in the human body is – (A) Tibia (B) Humerus (C) Femur (D) Radius Answer: (C)
Which part of the plant is responsible for sexual reproduction? (A) Stem (B) Leaf (C) Flower (D) Root Answer: (C)
What is the scientific study of fungi called? (A) Virology (B) Bacteriology (C) Mycology (D) Pathology Answer: (C)
Which of the following is an example of a vestigial organ? (A) Kidney (B) Appendix (C) Liver (D) Heart Answer: (B)
Which hormone is responsible for milk ejection? (A) Prolactin (B) Oxytocin (C) Estrogen (D) LH Answer: (B)
Which type of teeth are used for grinding food? (A) Incisors (B) Canines (C) Premolars and molars (D) Wisdom teeth Answer: (C)
Which mineral is essential for thyroid function? (A) Iodine (B) Iron (C) Calcium (D) Phosphorus Answer: (A)
Which enzyme is secreted in the saliva? (A) Pepsin (B) Lipase (C) Amylase (D) Trypsin Answer: (C)
Which part of the brain is responsible for vision? (A) Temporal lobe (B) Frontal lobe (C) Occipital lobe (D) Parietal lobe Answer: (C)
Which plant organ is responsible for absorbing water and minerals? (A) Stem (B) Leaf (C) Root (D) Flower Answer: (C)
Which system coordinates the activities of the body through hormones? (A) Circulatory (B) Nervous (C) Endocrine (D) Muscular Answer: (C)
Which is the innermost layer of the human skin? (A) Epidermis (B) Dermis (C) Hypodermis (D) Stratum corneum Answer: (C)
Which hormone controls the menstrual cycle? (A) Insulin (B) Estrogen (C) Adrenaline (D) Testosterone Answer: (B)
Which vitamin helps in collagen formation and wound healing? (A) Vitamin A (B) Vitamin C (C) Vitamin D (D) Vitamin K Answer: (B)
Which organ secretes bile juice? (A) Gallbladder (B) Pancreas (C) Liver (D) Small intestine Answer: (C)
Which of the following is responsible for movement in animals? (A) Connective tissue (B) Muscular tissue (C) Epithelial tissue (D) Nervous tissue Answer: (B)
Which of the following is a semi-permeable membrane? (A) Plasma membrane (B) Nucleus (C) Cell wall (D) Cytoplasm Answer: (A)
