4318458
Description
Flashcards by Elena Cade, updated more than 1 year ago
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Created by Elena Cade
almost 9 years ago
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| Question | Answer |
| Word equation and balanced chemical equation for photosynthesis: | |
| In which kind of cell does Photosynthesis take place? | Palisade Mesophyll Cells |
| Where does the Light-Dependant Reaction occur? | In the Grana/Thylakoids |
| Where does the Light-Independent Reaction occur? | In the Stroma |
| 2 things needed for the Light-Dependent Reaction to occur: | Light and H2O |
| 3 things needed for the Light-Independent Reaction to occur: | ATP, reduced NADP (NADPH) and CO2 |
| What is the purpose of light in the Light Dependent Reaction? | To 'excite' electrons in the chloroplast and bring them to a higher energy level (photosystem ll) |
| What happens to the electrons after their energy levels have been raised in photosystem ll? | They are passed down a chain of electron caririers |
| The energy released when as the electrons get passed down the carrier chain is used for what process? | Photophosphorylation (ADP + Pi --> ATP) |
| Leftover electrons after being passed down the carrier chain do what? | Replace those lost in Photosystem l |
| After being raised to a higher energy level, what do the electrons in photosystem l do? | They go to reduce NADP |
| Energy from electrons in photosystem ll are also used in which process? | Photolysis |
| What is Photolysis? | The splitting of water molecules |
| What are the products of photolysis? | H+ (proton), electron, O2 gas |
| What do the products of photolysis do? | H+ (proton) goes to reduce NADP, electron replaces those lost in photosystem ll and O2 gas is released as a waste product |
| In the Light Independent Reaction, which coenzyme 'fixes' Carbon Dioxide after it diffuses into the leaf? | RUBP (Ribulouse bisphosphate) - carbon acceptor molecule and a 5 carbon molecule |
| What happens after RUBP 'fixes' Carbon Dioxide? | 2 Glycerate 3-phosphate (GP) are formed by enzyme reactions (GP is a 3 carbon molecule) |
| What is the next stage in the Calvin Cycle (The Light Independent Reaction) | Energy from the breakdown of ATP (into ADP + Pi) and a hydrogen ion from reduced NADP (oxidation) are used to convert GP into Triose Phosphate (TP) |
| What is TP then used for? | Some TP is recycled back into RUBP and some is converted into glucose via enzyme reactions to be respired, converted etc. |
| Name 5 Limiting factors of Photosynthesis: (out of 9) | 1) Light intensity 2) Carbon Dioxide concentration 3) Temperature - (in relation to enzymes) 4) Wavelength (colour) of light 5) Chlorophyll concentration 6) Water availability 7) ATP concentration 8) NADPH concentration 9) Ribulose bisphosphate (RUBP) |
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