MCQ questions for class 10 Science Chapter 6 Life Processes
Question 1: What is the primary site of photosynthesis in a plant cell?
Mitochondria
Nucleus
Chloroplast
Endoplasmic reticulum
Question 2: What is the main function of the stomata in plant leaves?
Transpiration
Photosynthesis
Respiration
Guttation
Question 3: What is the breakdown of glucose in the absence of oxygen called?
Fermentation
Glycolysis
Krebs cycle
Electron transport chain
Question 4: Which of the following is not a raw material for photosynthesis?
Carbon dioxide
Water
Sunlight
Oxygen
Question 5: What is the function of the red blood cells in the human body?
Carry oxygen
Fight infections
Clotting of blood
Transport nutrients
Question 6: What is the main function of the kidneys?
Respiration
Excretion
Digestion
Circulation
Question 7: Which of the following is a digestive enzyme in the human stomach?
Amylase
Pepsin
Lipase
Trypsin
Question 8: What is the role of bile in digestion?
Emulsification of fats
Neutralization of stomach acid
Enzymatic digestion of proteins
Absorption of water
Question 9: What is the process by which food is broken down into simpler substances in the digestive system?
Assimilation
Absorption
Ingestion
Digestion
Question 10: Which of the following is a respiratory pigment in human blood?
Hemoglobin
Chlorophyll
Melanin
Myoglobin
Question 11: What is the role of the diaphragm in human respiration?
Pumping blood
Producing sound
Contracting and relaxing during breathing
Digesting food
Question 12: Where does the absorption of most nutrients occur in the human digestive system?
Stomach
Small intestine
Large intestine
Esophagus
Question 13: Which of the following is a characteristic of living organisms?
Growth
Magnetism
Decay
All of the above
Question 14: What is the main function of the alveoli in the respiratory system?
Exchange of gases
Filtering air
Production of mucus
Pumping blood
Question 15: Which of the following is a raw material for cellular respiration?
Carbon dioxide
Oxygen
Glucose
Water
Question 16: What is the process by which plants release water vapor through their leaves?
Photosynthesis
Transpiration
Respiration
Guttation
Question 17: What is the main function of the liver in the human body?
Filtering blood
Digestion of fats
Storage of bile
Detoxification
Question 18: Which of the following is a product of anaerobic respiration in yeast?
Carbon dioxide and water
Lactic acid
Ethanol and carbon dioxide
Acetic acid
Question 19: What is the function of the cilia in the respiratory tract?
Absorption of nutrients
Movement of mucus
Production of enzymes
Exchange of gases
Question 20: Which of the following is a waste product of cellular respiration?
Oxygen
Carbon dioxide
Glucose
Water
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