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18 Cards in this Set
- Front
- Back
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Waxy cuticle |
Top layer of a leaf, transparent to allow light through |
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Upper epidermis |
Protects leaf, transparent to allow light through |
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Palisade mesophyll |
Tall cells, so each recieves light. with thin cell wall so there is a short diffusion pathway and a large vacuole so chloroplasts are pushed to the top.b |
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Spongy mesophyll |
Large regular shaped cells to create air spaces |
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Vascular bundles |
Contains xylem and phloem |
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Lower epidermis |
Contains stomata and guard cells |
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Heterotrophs |
Uses complex organic substances for nutrition |
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Photoautotroph |
An organism which gets energy from synthesising simple inorganic molecules and sunlight |
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Chloroplast cell membrane |
Controls entry and exit of substance, has many transport proteins. |
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Stroma |
Where light independent reaction occurs, contains lots of enzymes |
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Thylakoid |
Absorbed light, so has a large surface area |
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Starch grains |
Store energy |
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Ribosomes |
Protein synthesis |
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Photosynthetic pigment |
A coloured molecule that absorbs certain wavelengths of light and transfers the energy to chemical energy. |
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Main pigment in chloroplast |
Chlorophyll A and Chlorophyll B |
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Accessory pigments |
Careteniods and xanthophy. Absorbed slightly different wavelengths and pass energy to chlorophyll, also protect it from high light intensity damage. |
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Photolysis |
Light energy splitting water into hydrogen ions, electrons and oxygen. |
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Photoexcitation |
Light energy absorbed by photosystems and energy passed to primary pigment. Electron the emitted. |
