Photosynthesis and diffusion (B4)
- Created by: Phoebe Taylor
- Created on: 01-04-13 12:32
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- Biology Unit B4
- Photosynthesis
- Biology Unit B4
- The process
- Takes place in chloroplasts
- contain pigments like chlorophyll - that absorb light
- Takes place in chloroplasts
- Glucose Uses
- Limiting Factors
- Light provides the energy needed for photosynthesis
- If light level is raised, photosynthesis rate increases
- But only up to a certain point
- Beyond that the CO2 or temperature become the limiting factors
- If light level is raised, photosynthesis rate increases
- Light provides the energy needed for photosynthesis
- Sun energy changes CO2 + H2O to glucose and oxygen
- The process
- Takes place in chloroplasts
- contain pigments like chlorophyll - that absorb light
- Takes place in chloroplasts
- The process
- Oxygen gas
- 1) Light energy splits water to make:
- Glucose
- 2) Carbon dioxide gas combines with the hydrogen ions to make:
- Glucose Uses
- 1) Respiration
- Converted into cellulose for making cell walls
- 2) Making cell walls
- 2) Making cell walls
- Can't dissolve in water and move away from storage areas
- If temperature is too high, the plant's enzymes denature
- Temperature increases rate
- Usually if temperature is limiting factor it's too low
- This happens at about 45 degrees
- If temperature is too high, the plant's enzymes denature
- Temperature increases rate
- Usually if temperature is limiting factor it's too low
- If temperature is too high, the plant's enzymes denature
- Particles flow through the membrane from where there's:
- High concentration
- To low concentration
- Cell membranes hold the cell together BUT they let stuff in and out
- Diffusion
- Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration
- Only very small molecules can diffuse through
- Like simple sugars, water or ions
- Diffusion
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