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strand 5 (part 1) - Coggle Diagram
strand 5 (part 1)
chloroplast structure
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smooth inner membrane ~ contains lots of transporter molecules that control movement of sugars and proteins into the chloroplast
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thylakoid membranes ~ flattened fluid filled sacs connected together in a chain containing pigments and electron carriers for LDR
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thylakoid spaces ~ between thylakoid membrane sacs are fluid filled and contain enzymes for photolysis
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light dependent reaction
- photosynthetic pigment in photo system II absorbs light energy
- Energy from the light excites an electron from the photosynthetic pigment and the electron leaves photo system II this process is called photoionisation
- electron moves along the electron transport chain through a series of redox reactions releasing energy as it moves along
- energy is used to form ADP and Pi which then form the first product of the reaction which is ATP involving ATP synthase
5, NADP is reduced to form reduced NADP the second product of the reaction
- photolysis of water makes protons electrons and oxygen and the electrons replace those lost in photo system II and the reaction continues
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leaf adaptations
light
large surface area of leaves. leaf arrangements which minimise overlapping. thin leaves - most light absorbed in the first few mm. leaves get bigger in low light levels. transparent cuticle and epidermis. mesophyll/palisade cells packed with chloroplasts.
water
roots which respond to water requirements. stomata that close to prevent water loss. network of xylem providing water via transpiration.
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