Clear breakdown of photosynthesis steps, digestive enzymes, ATP yield in respiration, and board diagram presentation.
Life Processes is the central Biology chapter of Class 10 CBSE Science, covering essential physiological functions sustaining living organisms.
Autotrophic & Heterotrophic Nutrition: Photosynthesis equation: 6CO2 + 6H2O -> C6H12O6 + 6O2 in presence of Chlorophyll and Sunlight. Steps: Absorption of light energy -> Conversion to chemical energy and splitting of H2O -> Reduction of CO2 to carbohydrates. Guard cells regulate Stomata opening via turgor pressure changes.
Human Digestive System: Alimentary canal process: Salivary Amylase (starch to maltose) in mouth -> Pepsin (protein digestion in acidic medium) in stomach -> Bile juice (emulsification of fats) and Pancreatic enzymes (Trypsin, Lipase) in small intestine -> Villi absorption.
Respiration Pathways: Breakdown of Glucose (6-carbon) into Pyruvate (3-carbon) in cytoplasm. Aerobic Respiration (in mitochondria with O2 gives CO2 + H2O + 38 ATP). Anaerobic Respiration in yeast (Fermentation gives Ethanol + CO2 + 2 ATP) and muscle cells (lactic acid accumulation causing cramps + 2 ATP). Dr. Aarzoo Saini guides Life Processes diagrams at We-Gyaan Classes.
Key Takeaways for Students
- Write the balanced photosynthesis equation and outline three main light/dark steps.
- Identify digestive enzymes, substrates, products, and optimal pH in human alimentary canal.
- Compare Aerobic vs Anaerobic respiration pathways and ATP yields.
- Draw neat labeled diagrams of human digestive system and stomatal apparatus for CBSE boards.
Authored by Dr. Aarzoo Saini
Founder & Lead Educator at We-Gyaan Classes Roorkee, with over 20 years of teaching excellence in Science and Chemistry for Board Exams, NEET, JEE, and CUET.