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B4 Plant nutrition - Coggle Diagram
B4 Plant nutrition
Photosynthesis
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The reaction requires energy which is obtained by the pigment chlorophyll trapping light from the Sun
So photosynthesis can be defined as the process by which plants manufacture carbohydrates from raw materials using energy from light
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The light energy is converted into chemical energy in the bonds holding the atoms in the glucose molecules together
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Plants can also convert glucose into starch for storage, into lipids for an energy source in seeds, into cellulose to make cell walls or into amino acids (used to make proteins) when combined with nitrogen and other mineral ions absorbed by roots
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Need for chlorophyll
Although plants make glucose in photosynthesis, leaves cannot be tested for its presence as the glucose is quickly used, converted into other substances and transported or stored as starch.
Starch is stored in chloroplasts where photosynthesis occurs so testing a leaf for starch is a reliable indicator of which parts of the leaf are photosynthesising.
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