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21 Cards in this Set
- Front
- Back
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How does photosynthesis provide the energy that's liberated for metabolism in celullar respiration?
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releases O2 which starts cellular respiration. mitochondria
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What is the significance of O2 as a by-product in photosynthesis to life?
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allows cellular respiration to function
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Where are the chloroplast in the plant leaf and what is the structure of this organelle?
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mesophyll cells. 2 membranes, and an inner membrane space.
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How does the chloroplast structure allow for separation of reactions?
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compartmentalization
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How do the light reactions and Calvin cycle in photosynthesis differ with respect to the products that come out of the reactions?
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light- produces ATP, NADPH, and O2
Calvin- produces glucose and other sugars |
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What type of energy is light and how does wavelength become important for photosynthesis?
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can be different forms of energy. Chloroplasts will absorb a lower wavelength more effectively
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What is an action and absorption spectrum and what do they tell you?
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action- measures wavelength against a substance
absorption- measures light absorbed in a substance |
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Why are pigments so important in energy capture (think of how they are changed)?
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absorbs light
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How do Photosystem I and Photosystem II differ with respect to their reactions?
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PSII- is non-cyclic and PSI is cyclic
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What is the significance of Pp, QA, QB and the electron transport chain in the thylakoid membrane?
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different reactions occur there
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What does the oxidation of H2O result in and where does it occur?
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H+ electrochemical gradient, PSII
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What role does the H+ gradient and ATPase play in the light reactions of photosynthesis?
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uses chemiosmotic energy generating from H+ gradient created by splitting water
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What is chemiosmosis and what does it accomplish?
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H+ electrons flow through enzyme down a gradient. generates ATP
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How does non-cyclic and cyclic photophosphorylation differ?
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NC is linear and uses PSII and PSI C is cyclic and only uses PSI
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In the Z-scheme representation of photosynthesis, what portion of the process is being represented and what does it tells us about energy levels and pigments?
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Non-cyclic. increase and decrease in energy of an electron.
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What low energy molecule starts the Calvin cycle?
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Acetyl CoA
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What is the vital role of rubisco in the Calvin cycle and what does it accomplish?
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combines RuBP with O2, photorespiration
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What is regenerated in the Calvin cycle and why is this important?
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RuBP, the cycle can now start again
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What is the significance of G3P?
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3 Carbon sugar. Pivotal molecule in metabolic pathways. splitting of fructose-1,6 biphosphate
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What is photorespiration and how does it affect the Calvin cycle?
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combining O2 with RuBP, starts the calvin cycle
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How do C3 plants differ from C4 and CAM plants?
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C3 uses mesophyll cells only. C4 uses mesophyll cells and bundle-sheath cells. CAM uses mesophyll cells at night.
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