B4
- Created by: hollyspann
- Created on: 16-06-15 21:14
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- B4
- Enzymes
- Proteins that speed up chemical reactions.
- Substrates are molectules that have been altered in a reaction.
- The Lock and Key model:
- An increase in temperature increases the rate at first but if it gets too hot the bonds break so the substrate will no longer fit the active site
- Cell Structure and Function
- Cell Membrane - In & Out
- Cytoplasm - Enzymes are made, anaerobic respiration
- Mitochondria - Aerobic Respiration
- Nucleus - DNA, instructions for making Enzymes
- Cell Wall - Keeps cell rigid.
- Chloroplasts - Contain chlorophyll for photosynthesis
- Vacuole - Cell sap for salt and sugar
- Respiration
- Aerobic - series of chemical reactions which releases energy by breaking down large food molecules
- O2 H12 O6 + 6O2 --> 6H2O + 6CO2
- Energy released in respiration is used for: movement, active transport, synthesis of large molecules
- Anaerobic - 'Without Oxygen'
- Animal Cells - When excersise excessively the muscle can't take in oxygen.
- Plant Cells - When the soil's waterlogged, there is no oxygen intake because of the water.
- Bacteria Cell - puncture in skin there's no oxygen underneath so to survive it has to anaerobically respire.
- Glucose --> lactic acid (+light)
- Aerobic - series of chemical reactions which releases energy by breaking down large food molecules
- Photosynthesis
- Series of chemical reactions which take in energy from the sun to produce food
- Oxygen = waste product
- 6CO2 + 6H2O --> C6H12O6 + 6O2
- Photosynthesis is at the start of the food chain - the energy gets passed down by eaters
- Glucose is mixed with nitrates in the soil to produce amino acids to form proteins
- The Rate of Photosynthesis has 3 limiting factors - Light (Night), CO2 (If neither) and Temperature (Winter)
- Investigating: Transect (Tape Measure), Light Meter (Light Level), Quadrat (Percentage cover), Identification Key (Questions)
- Enzymes
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