IB Biology: C1.3 Photosynthesis

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What is photosynthesis?

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Photosynthesis is the process by which cells synthesise organic compounds (e.g. glucose) from inorganic molecules (CO2 and H2O) in the presence of light energy.

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How is energy transformed during photosynthesis?

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Light energy is transformed to chemical energy when carbon compounds are produced in photosynthesis.

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What is the word equation for photosynthesis?

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Carbon dioxide + water = glucose + oxygen in the presence of light energy, using chlorophyll.

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What is the chemical equation for photosynthesis?

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6CO2 + 6H2O = C6H12O6 + 6O2 in the presence of light energy, using chlorophyll.

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What conversions occur during photosynthesis?

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Carbon dioxide is converted to glucose in photosynthesis using hydrogen obtained by splitting water.

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Which organisms carry out photosynthesis?

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Plants, algae, cyanobacteria.

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What is the main product of photosynthesis?

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Glucose.

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What is the by-product of photosynthesis?

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Oxygen.

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Where does the oxygen produced by photosynthesis come from?

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The oxygen produced in photosynthesis comes from photolysis of water (splitting of water using light energy).

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What pigment is involved in photosynthesis?

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Chlorophyll.