GCSE Biology OCR B4
a mind map to help you revise topic B4
- Created by: Olivia Aston-Abbott
- Created on: 10-01-13 15:27
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- B4
- Respiration
- Aerobic
- releases more energy
- with oxygen
- Anaerobic
- No oxygen
- Can produce:
- Lactic acid
- in micro-organisms:
- Ethanol
- Carbon Dioxide
- body cant supply enough oxygen
- Aerobic
- Enzymes
- protein- catalyst
- "lock and key"
- enzyme has active site
- substrate joins the enzyme
- enzyme has active site
- very selective
- need specific constant temperature
- too hot: bonds break
- changes enzyme shape
- substrate no longer fits
- changes enzyme shape
- too hot: bonds break
- pH
- too high or low- bonds break
- denatured
- pH is a measure of how acidic or alkaline a solution is
- too high or low- bonds break
- need specific constant temperature
- Photosyn-thesis
- diffusion
- movement of particles from high con. to low con.
- does not need energy
- uses CO2
- produces 02
- movement of particles from high con. to low con.
- osmosis
- water from dilute to more concen-trated solution
- partially-permeable membrane
- water movement
- take in water by osmosis
- water is drawn into the roots
- partially-permeable membrane
- water from dilute to more concen-trated solution
- active transport
- chemicals move across a cell membrane from low to high con.
- uses energy released from respiration
- moves minerals from soil into root cells
- uses energy released from respiration
- chemicals move across a cell membrane from low to high con.
- Respiration
- releases more energy
- amount of light
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