Photosynthesis produces glucose using light. It uses energy to change carbon dioxide and water into glucose and oxygen.
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Where does Photosynthesis take place?
It takes place in chloroplasts in green plant cells - they contain green pigments like chlorophyll that absorb light.
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How is the energy transferred?
Energy is transferred to the chloroplasts from the environment by light. Photosynthesis is an endothermic reaction.
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What is the word equation for Phtotsynthesis?
carbon dioxide + water ---------> glucose + oxygen
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What is the symbol equation for Photosynthesis?
6CO + 6H O ---------> C H O + 6O
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Name the five ways plants use glucose.
For respiration, making cellulose, making amino acids, stored as oils or fats and stored as starch.
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What is a Limiting Factor?
A limiting factor is a a factor present in an environment that controls a process.
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Name 4 limiting factors of Photosynthesis?
Light intensity, concentration of CO , temperature and amount of chlorophyll.
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Describe the effect of Light on Photosynthesis?
Not enough light slows down the rate of photosynthesis as it provides the energy needed to carry it out.
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Describe the effect of Carbon Dioxide Levels on Photosynthesis?
Too little Carbon Dioxide also slows down photosynthesis as it is one of the key reactants for photosynthesis.
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Describe the effect of Temperature on Photosynthesis?
The temperature needs to be just right. If it is low, the enzymes work slower at a lower temperature. But if it's too hot, the enzymes will become denatured and can no longer work properly.
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What is a Independent Variable?
A variable that you change.
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What is a Dependent Variable?
A variable that you measure.
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What is a Control Variable?
A variable(s) that you keep the same.
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What is Respiration?
Respiration is the process of transferring energy from glucose, which goes on in every cell.
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Give three examples of how organisms use Respiration.
To build up larger molecules from smaller ones. In animals, it's used to allow the muscles to contract. In mammals and birds the energy is used to keep their body temperature steady in colder surroundings.
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What is Metabolism?
Metabolism is all the chemical reactions taking place inside an organism.
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What is Aerobic Respiration?
Aerobic Respiration is respiration which uses oxygen. It's the most efficient way to transfer energy to glucose. It goes on all the time in animals and plants.
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Where does Aerobic Respiration take place?
Inside the mitochondria.
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What is the word equation for Aerobic Respiration?
glucose + oxygen ---------> carbon dioxide + water
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What is the symbol equation of Aerobic Respiration?
C H O + 6O --------> 6CO + 6H O
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What is Anaerobic Respiration?
Anaerobic Respiration is respiration without oxygen. It's the incomplete breakdown of glucose, making lactic acid.
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What is a disadvantage Anaerobic Respiration?
It doesn't transfer nearly as much energy as aerobic respiration because the the glucose isn't fully oxidised.
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What is the word equation for Anaerobic Respiration?
glucose -------> lactic acid
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What happens in Anaerobic Respiration in Plants and Yeast Cells?
They produce ethanol instead of lactic acid.
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What is the word equation for Anaerobic Respiration in Plants and Yeast Cells?
glucose -------> ethanol + carbon dioxide
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What is the name for Anaerobic Respiration in Yeast Cells?
Fermentation
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Explain the effect of exercise on Respiration.
When you exercise you respire more because the working muscles need energy from respiration to contract.
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What is Oxygen Debt?
Oxygen Debt is the amount of extra Oxygen your body need to react with the build up of lactic acid and remove it from the cells. Oxygen reacts with lactic acid to form harmless Carbon Dioxide and Water.
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Other cards in this set
Card 2
Front
Where does Photosynthesis take place?
Back
It takes place in chloroplasts in green plant cells - they contain green pigments like chlorophyll that absorb light.
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