B4- the processes of life
- Created by: Fcvten
- Created on: 23-03-15 15:42
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- B4 - The Processes of Life
- Cell Structure & Function
- Plant Cells
- Cell wall - made of cellulose. supports the cell & strengthens it.
- Chloroplasts - where Fotosynthesis takes place.
- Vacuole - a weak solution of sugar & salts(cell sap)
- Animal Cells
- Cell Membrane - holds the cell together & controls what goes in & out.
- Cytoplasm - where enzymes are made
- Mitochondria - where the reaction takes place, & where the enzymes are found.
- Nucleus - contains DNA, which is instructions to make proteins.
- Yeast
- Cell membrane / nucleus / cell wall / mitochondria / cytoplasm
- Simple cell structure
- Cell wall
- Cell membrane
- Cytoplasm
- Circular DNA molecule
- Plant Cells
- Fotosynthesis
- Chlorophyll is needed for Fotosynthesis
- Is a series of chemical reactions that USES ENERGY from the SUN to PRODUCE FOOD.
- Carbon dioxide + water = Glucose + Oxygen
- 3 uses of glucose in plants.
- Stores as Starch
- Respiration
- To make Chemicals for Growth
- Enzymes
- Lock & Key model: substrate needs to fit into the active site.
- What are they?
- Enzymes are proteins that speed up Chemical Reactions.
- Enzymes work at their optimum Temperature & PH
- Rate of Fotosynthesis
- 3 factors that affect rate of Fotosynthesis
- Amount of CO2
- Amount of Light
- Temperature
- 3 factors that affect rate of Fotosynthesis
- Diffusion, Osmosis & Active Transport
- OSMOSIS: The movement of WATER MOLECULES from HIGH CONCENTRATION to an area of LOW CONCENTRATION.
- DIFFUSION is the movement of particles from a region of HIGH CONCENTRATION to a region of LOW CONCENTRATION.
- Active Transport: Movement of Chemicals across a CELL MEMBRANE from an area of LOW CONCENTRATION to HIGH CONCENTRATION using ENERGY released by respiration.
- Anaerobic Respiration
- Happens in; Human cells/ Plant Cells/ Bacterial cells
- Produce Lactic Acid
- Can also produce Ethanol & Carbon dioxide
- "Anaerobic" just means "without oxygen"
- Investigating Fotosynthesis
- TRANSECT: to investigate how something changes across an area.
- Light Meter Quadrat Indentification Key
- Aerobic Respiration
- "Aerobic" just means "with Oxygen"
- Glucose + Oxygen = Carbon dioxide + Water + Energy
- The energy released by respiration, is used to power some of the chemical reactions that happens in cells;
- Movement
- Synthesis of large molecules (polymers)
- Active Transport
- Cell Structure & Function
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