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What enzyme fixes CO2 in the cytosol of a mesophyll cell in a C4 plants?
Why is the C4 photosynthesis called C4 photosynthesis?
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- What is so special about thylakoid membranes (and chloroplasts in general) that allow it to be the site for photosynthetic activity in plants?For most plants, two distinct photosystems (Photosystem I and Photosystem II) work together in series during photosynthesis. These photosystems are complexes of proteins and pigment molecules. Statement 1: Photosystem I has an absorption maximum of 680 nm, whereas Photosystem II has an absorption maximum of 700 nm. Statement 2: The special pair of chlorophyll a molecules in the reaction center of photosystem I is designated as P700, whereas the special pair of chlorophyll a molecules in the reaction center of photosystem II is designated as P680. Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false.Which of the following correctly sequences the steps of non-cyclic electron transport? a) Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules b) Electrons donated from water molecules pass through photosystem I then photosystem II before returning to the chlorophyll molecules, generating ATP in the process c) Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions d) The ATP and NADPH generated by the reactions of photosystem II and photosystem I are utilized by the Calvin Cycle to build high energy glucose molecules
- Eukaryotic chloroplasts generate exactly how many product molecules, in their consumption of six substrate carbon dioxide molecules and twelve water molecules, during oxygenic photosynthesis? twelve C6H12O6 molecules, six H2O molecules, and three CO2 molecules are produced one C6H12O6 molecule, six H2O molecules, and six O2 molecules are produced six C6H12O6 molecules, three H2O molecules, and six CO2 molecules are produced twelve H2O molecules and six O2 molecules are produced six H2O molecules and twelve CO2 molecules are producedTypically the CO2 necessary for photosynthesis enters through the stomata of the plant leaves suppose petroleum jelly was used to coat the leaves out of this tomato blocked or closed a) what effect will this have on the light reactions in these leaf cells b) what effect will this have on the Calvin cycle in these leaf cellsHow many water molecules have to be split as part of the light reactions to produce enough ATP and NADPH for the Calvin cycle to produce one molecule of glyceraldehyde-3-phosphate (G3P)? STROMA (low H+ concentration) Light THYLAKOID SPACE (high H+ concentration) STROMA (low H+ concentration) Photosystem II 4 H+ H₂O 1 1/2 0₂ +2 H+ Thylakoid membrane Cytochrome complex Light Pq 4 H+ Photosystem I Pc ATP synthase ADP + H+ Fd M ATP NADP+ reductase NADP+ + H+ NADPH To Calvin Cycle
- Plant chloroplasts are able to generate which of the following inorganic product molecules during oxygenic photosynthesis? C6H12O6 CO CO2 O2 H2SIn the light-dependent reaction of photosynthesis, what specifically happens in the electron transport chain between Photosystem II and Photosystem I? The excited electron accepted by the primary acceptor in Photosystem II is transferred to pheophytin and plastoquinones, then to cytochrome complex, and finally to plastocyanin. Plastocyanin then transfers the electron to the P700 in the reaction center complex of Photosystem I. The excited electron accepted by the primary acceptor in Photosystem I is transferred to pheophytin and plastoquinones, then to cytochrome complex, and finally to plastocyanin. Plastocyanin then transfers the electron to the P700 in the reaction center complex of Photosystem II. The excited electron accepted by the primary acceptor in Photosystem I is transferred to plastocyanin, then to cytochrome complex, and finally to pheophytin and plastoquinones. Plastoquinone then transfers the electron to the P700 in the reaction center complex of Photosystem II.…Which of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correct
- In C3 plants, high concentrations of oxygen inhibit photosynthesis. Why is this so?What enzyme fixes CO2 in bundle sheath cell of chloroplasts in Calvin Cycle of C4 plants?What is the overall outcome of the light reactions in photosynthesis? NADPH and ATP molecules are produced during the light reactions and are used to power the light independent reactions. NADPH and ATP molecules are produced during the light reactions, which are used to power the light dependent reactions. Sugar and ATP are produced during the light reactions, which are used to power the light independent reactions. Carbon dioxide and NADPH are produced during the light reactions, which are used to power the light dependent reactions.