5396611
Description
Flashcards by Laura Perry, updated more than 1 year ago
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Created by Laura Perry
over 8 years ago
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| Question | Answer |
| Autotroph (definition) | An organism that can use light or chemical energy and inorganic molecules to synthesise large organic molecules. |
| Heterotroph (definition) | Organisms that ingest and digest complex organic molecules, releasing the chemical potential energy within them |
| What is a photoautotroph? | An organism that can photosynthesise |
| What is photosynthesis? | The process where light energy from the sun is transformed into chemical energy which is used to synthesise large, organic molecules. |
| How does respiration rely on photosynthesis? | It requires the oxygen created in photosynthesis for aerobic respiration. It also requires the large organic molecules formed in photosynthesis to be broken down to release energy. |
| Where does photosynthesis take place? | In specialised organelles found in plants called chloroplasts. The two main stages of photosynthesis take place here |
| What is the structure of a chloroplast? | |
| How is the inner membrane of the chloroplast adapted to its role? | The inner membrane contains transport proteins which control the entry and exit of substances between the cytoplasm and the stroma. |
| How is the grana of the chloroplast adapted to its role? | It provides a surface for photosynthetic pigments and photosystems to maximise absorption of light. |
| How is the stroma of the chloroplast adapted to its role? | It contains the enzymes for the light independent stage. It surrounds the grana so it easy for the products of the light dependent reaction to move o the stroma for the light independent reaction. |
| Photosynthetic pigment (definition) | Molecules that absorb light energy. Each pigment absorbs a different wavelength of light whilst reflecting the others. |
| What does a photosystem look like? |
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