Week7 photosynthesis and cell respiration

• Photosynthesis


  Process used by plants and some bacteria to create energy from sunlight
• Chlorophyll


  Green pigment in plants responsible for conversion process during photosynthesis
• Photosynthesis


  Phototrophs use energy from the sun along with carbon dioxide and water to form glucose and oxygen
• Equation for photosynthesis:
• Respiration


  Process of taking oxygen from the air and cycling it through the lungs, giving oxygen to blood to be used in the body
• Cellular respiration


  Uses glucose or sugars from food molecules and turns them into carbon dioxide, water, and ATP
• Aerobic cellular respiration


  Glucose reacts with oxygen forming ATP, carbon dioxide and water are by-products
• Equation for cellular respiration:
• Terms


  • Cellular respiration
  • ATP
  • Mitochondria
  • Cytoplasm
  • Aerobic
  • Anaerobic
  • Fermentation
• Photosynthesis and respiration


  Complement each other, occurring in reverse manner
• Plants are important for the following reasons: 1) Source of food for almost all organisms, 2) Provide resources for humans with aesthetic and economic benefits, 3) Provide habitats for different organisms, 4) Role in biogeochemical cycles, 5) Maintain the Earth's atmosphere through photosynthesis
• Photosynthesis


  Biological reaction where plants take in carbon dioxide and water, and use sunlight energy to produce glucose and oxygen
• Photosynthesis


  Carbon dioxide + Water + Sunlight -> Glucose + Oxygen
• Photosynthesis


  • Has two major steps: 1) Light-dependent reactions, 2) Light-independent reactions (Calvin cycle)
• Chloroplast


  Organelle in plant cells where photosynthesis takes place
• Chloroplast


  • Contains thylakoids, grana, lumen, stroma, inner and outer membranes
• Light-dependent reactions


  Occur in thylakoids, oxidize water to produce oxygen, ATP, and NADPH
• Light-independent reactions (Calvin cycle)


  Occur in stroma, use ATP and NADPH to convert carbon dioxide into glucose
• Light-dependent and light-independent reactions


  Differ in location, need for sunlight, reactants and products, but both require ATP
• Products of photosynthesis


  • Glucose, oxygen
• Photosynthesis is the process by which plants convert solar energy into chemical energy in the form of glucose
• Chlorophyll in plant cells absorbs light energy to power photosynthesis
• Photosynthesis maintains the Earth's atmosphere by removing carbon dioxide and releasing oxygen
• Photosynthesis Equation


  6 CO2 + 6 H2O + Light Energy → C6H12O6 (glucose) + 6 O2
• Byproduct of Photosynthesis


  O2 (Oxygen)
• Oxygen Produced During


  Photosynthesis
• Purpose of Photosynthesis


  Produces Food (glucose) and Releases Oxygen (O2)