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Description
Flashcards by hannawin98, updated more than 1 year ago
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Created by hannawin98
over 8 years ago
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| Question | Answer |
| Disadvantages of measuring co2 uptake to measure the rate of photosynthesis | 1. Co2 is only used in one stage of photosynthesis 2. Co2 produced in respiration might be used for photosynthesis |
| Disadvantages of using oxygen production to measure the rate of photosynthesis | 1. Oxygen only produced in one stage of photosynthesis 2. Oxygen might be used for respiration |
| Name the components of the chloroplasts | 1. The Chloroplast envelope 2. the Inner Chloroplast envelope 3. The Thylakoids 4. Stroma 5. Lamaelle 6. Grana 7. Starch grains |
| How is the Chloroplast adapted for photosynthesis? | 1. The chloroplast envelope keeps the reactants for photosynthesis close to their reaction sites 2. Thylakoids have a large surface area 3. ATP synthase molecules are located in the thylakoid membrane 4. The stroma contain enzymes etc for light-independent reaction |
| What are redox reactions? | Reactions that involve oxidation and reduction |
| What is reduction? | The gain of Hydrogen/the loss of Oxygen |
| What is Oxidation? | The loss of Hydrogen/the gain of Oxygen |
| What is a co-enzyme? | A molecule that aids the function of an enzyme. They transfer a chemical group from one molecule to another |
| What co-enzyme is used in photosynthesis? | NADP |
| What two stages occur in the light-dependent reaction? | 1. Cyclic photophosphorylation 2. Non-cyclic photophosphorylation |
| Outline the process of Non-cyclic photophosphorylation | 1. Light energy is absorbed by PSII, which excited electrons 2. Light excited electrons leave the chlorophyll and enter the ETC, here they move down levels, where energy is harvested. 3. This energy is used to make ATP by chemiosmosis 4. Electrons enter PSI and gain energy, they then are transferred to NADP 5. Photolysis occurs, the electron enters PSII while the H+ ion joins NADP and the electron to form NADPH. |
| Outline the process of cyclic photophosphorylation | 1. Light energy is absorbed by PSI which excites electrons 2. These leave the chlorophyll and enter the ETC where energy is harvested 3. This energy is used to actively pump H+ ions into the membrane to be diffused out, making ATP by chemiosmosis 4. The electron re-enters PSI for the process to start again |
| What is photolysis? | The splitting of water using light energy into H+ ions, electron and oxygen |
| Name the process of the Light-independent stage | The Calvin cycle |
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