Flashcards
Photosynthesis
Flashcards do conjunto (10)
- 1What is the word equation for photosynthesis?Carbon dioxide +water > glucose + oxygen
- 2What is the balanced symbol equation for photosynthesis?
- 3What is the glucose used for?-to make cellulose for plant cell walls
-used to make proteins for plant growth and repair
-used as energy
-stored as starch
-stored as fats and oils - 4What is the oxygen used for?-used in respiration
-released into air - 5Why is starch good for storage?-it is insoluble and therefore not easily lost form the cell in solution
- it is not very reactive
-it does not affect the water concentration inside cells - 6What conditions are needed for photosynthesis?Light energy and chlorophyll
- 7Why does warmth increase the rate of photosynthesis?Higher temperatures increase the rate of reaction of enzymes involved in photosynthesis.
- 8What was Priestly's experiment and what did he discover?He put part of a mint plant in a transparent closed space with a burning candle (which used up the oxygen). After 27 days he was able to relight the candle. The plant had produced oxygen.
- 9What conditions speed up photosynthesis?-warmth
-increased carbon dioxide levels
-increased amount of light - 10How is a leaf adapted for photosynthesis?>the epidermis is thin and transparent, allowing light through to inner cells >the palisade cells contain large numbers of chloroplasts to absorb a lot of light energy >the chloroplasts are arranged mainly down the sides of the palisade cells, allowing some light to reach the mesophyll cells >air spaces between mesophyll cells allow gases to diffuse easily and reach all cells >the mesophyll cells are small and irregular, this increases their surface area to volume ratio so large amounts of gases can enter and exit the cells.
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- GCSE Biology FlashCards sobre Photosynthesis, criado por Anna. M em 12-05-2013.
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- Anna. M
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