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970675
IB SL Biology: Chemical Elements and Water
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Mind Map on IB SL Biology: Chemical Elements and Water, created by mcgowan-w-10 on 04/06/2014.
Mind Map by
mcgowan-w-10
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mcgowan-w-10
almost 10 years ago
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Resource summary
IB SL Biology: Chemical Elements and Water
Most frequently occurring chemical elements in living things
Carbon
Hydrogen
Oxygen
Nitrogen
Other necessary elements
Sulphur
Needed for synthesis of two amino acids
Calcium
Acts as a messenger by binding to calmodulin + other proteins which regulate transcription + other processes in the cell
Phosphorus
Part of DNA molecules
Part of phosphate groups in ATP
Sodium
Raises solute concentration in cytoplasm which causes water to enter by osmosis
Iron
Synthesis of cytochromes (proteins used during electron transport for aerobic respiration
Properties of water
Thermal
Large HC: much energy needed to break hydrogen bonds
temperature generally remains stable
High boiling and freezing points
Due to strong hydrogen bonds
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