Category: Biology GK MCQ

Q1. What is the average percentage of plasma in human blood?a) 45%b) 55%c) 60%d) 70% Q2. Which of the following is a major component of red blood cells?a) Hemoglobinb) Insulinc) Plasmad) Platelets Q3. What is the primary function of white blood cells?a) Transporting oxygenb) Blood clottingc) Fighting infectionsd) Carrying nutrients Q4. Platelets in the blood […]

Q1. What is the muscular organ responsible for pumping blood throughout the circulatory system?a) Lungsb) Liverc) Heartd) Kidneys Q2. Which chamber of the heart receives deoxygenated blood from the body?a) Left atriumb) Right atriumc) Left ventricled) Right ventricle Q3. What is the function of the valves in the heart?a) To regulate blood pressureb) To prevent

Q1. Which of the following components of blood is primarily responsible for carrying oxygen to tissues?a) Red blood cellsb) White blood cellsc) Plateletsd) Plasma Q2. What is the primary function of the heart in the circulatory system?a) Filtering bloodb) Producing blood cellsc) Pumping bloodd) Storing blood Q3. Which of the following blood vessels carries oxygen-rich

Q1. Which of the following structures in plants is primarily responsible for gas exchange?a) Stomatab) Xylemc) Phloemd) Root hairs Q2. What is the primary waste product of photosynthesis in plants?a) Oxygenb) Carbon dioxidec) Glucosed) Water Q3. In which part of the plant does most of the water absorption occur?a) Stemb) Leavesc) Rootsd) Flowers Q4. Which

Q1. Which of the following organs is primarily responsible for the exchange of gases in animals?a) Heartb) Liverc) Lungsd) Stomach Q2. Which gas is primarily taken in during respiration?a) Carbon dioxideb) Nitrogenc) Oxygend) Hydrogen Q3. What is the waste product expelled during respiration?a) Oxygenb) Nitrogenc) Carbon dioxided) Hydrogen Q4. Which of the following is NOT

Q1. Which structure in the respiratory system is responsible for the exchange of oxygen and carbon dioxide in the lungs?a) Alveolib) Tracheac) Bronchid) Diaphragm Q2. What is the main function of the trachea in the respiratory system?a) Gas exchangeb) Production of mucusc) Passage of air to and from the lungsd) Protection of the lungs from

Q1. What is the primary vascular tissue responsible for transporting water and minerals from roots to the rest of the plant?a) Xylemb) Phloemc) Epidermisd) Cortex Q2. Which of the following is responsible for transporting sugars and other organic compounds from leaves to other parts of the plant?a) Xylemb) Phloemc) Epidermisd) Cortex Q3. Which cells in

Q1. Which organ in the human excretory system is responsible for filtering waste products from the blood?a) Liverb) Lungsc) Kidneysd) Pancreas Q2. What is the primary nitrogenous waste product excreted by humans?a) Ureab) Ammoniac) Uric acidd) Creatinine Q3. Which part of the nephron is responsible for reabsorbing water and essential solutes back into the bloodstream?a)

Q1. Which of the following structures is responsible for producing sperm in the male reproductive system?a) Testisb) Epididymisc) Prostate glandd) Vas deferens Q2. What is the primary function of the prostate gland in the male reproductive system?a) Production of spermb) Secretion of seminal fluidc) Storage of spermd) Passage for sperm to enter the urethra Q3.

Q1. Which of the following is a method of sexual reproduction in animals?a) Buddingb) Binary fissionc) Fragmentationd) External fertilization Q2. In which stage of sexual reproduction does meiosis occur?a) Fertilizationb) Gametogenesisc) Zygote formationd) Cleavage Q3. Which of the following is NOT a function of gonads in sexual reproduction?a) Production of gametesb) Secretion of hormonesc) Storage