Photosynthesis (AQA GCSE Biology Combined Science): Flashcards

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Photosynthesis
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Definition of photosynthesis

How plants make their own food

Where photosynthesis occurs in plant cells

Chloroplasts

Type of reaction photosynthesis is

Endothermic

Word equation for photosynthesis

carbon dioxide + water → glucose + oxygen

Symbol equation for photosynthesis

6CO2+6H2O→C6H12O6+6O26CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2

4 factors affecting photosynthesis rate

Temp, CO₂ conc, light intensity, chlorophyll amt

Effect of too high temp on photosynthesis enzymes

Enzymes get damaged (denatured)

Colour of leaf with starch when iodine added

Blue-black

Why only green parts of variegated leaf test positive for starch

Only green parts have chlorophyll to do photosynthesis

5 uses of glucose by plants

Respiration, starch, fats/oils, cellulose, amino acids

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