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Ribulose bisphosphate carboxylase, which might be the most abundant protein on Earth, is part of which photosynthetic reaction?
- the Hill reaction
- the light-independent reaction
- photosystem II
- the light-dependent reaction
- photosystem I
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- Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?Ribulose bisphosphate carboxylase, which might be the most abundant protein on Earth, is part of which photosynthetic reaction? cell biology the Hill reaction the light-independent reaction photosystem II the light-dependent reaction photosystem IWhat process is shown in the figure below? 3 Molecules CO2 RuBisCO Stage 1: carbon fixation 3 ADP 6 ATP ЗАТР 6 ADP Stage 3: regeneration of RUBP Stage 2: reduction 6 NADPH - 6 NADP*+ H* Sugar O Glycolysis O Light reactions of photosynthesis Oxidative phosphorylation Citric Acid Cycle O Dark reactions of photosynthesis
- avelengths (Choose J |Choose | graph plotting a pigment's light absorption versus wavelength reaction- center complex is system consists of a reaction-center complex surrounded by nt-harvesting complexes absorption spectrum spectrophotometer molecule located in the reaction center accepts excited ctrons photosystem light harvesting complex reaction-center chlorophyll a of this photosystem iş called P680 ause it is best at absorbing a wavelength of 680 nm. primary electron acceptor wavelength PSI estion 4 PS II action spectrum >A culture of the single celled organism Chlamydomonas is actively carrying out photosynthesis in the presence of light and CO2. If you turned off the light, how would you expect the amounts of ribulose 1,5-bisphosphate and 3-phosphoglycerate to change over the next minute? How about if you left the light on and removed the CO2?Using the action spectrum for photosynthesis, determinewhat wavelengths of light appear to be optimal forphotosynthesis. [Hint: Refer to the Biochemistry inPerspective essay entitled Photosynthetic Studies atthe companion website, www.oup.com/us/mckee.]
- Cell membranes are required for electron transfer phosphorylation. Thylakoid membranes in chloroplasts serve this purpose in photosynthetic eukaryotes. Prokaryotic cells do not have this organelle, but many are photosynthesizers. How do you think they carry out the light-dependent reactions, given that they have no chloroplasts? (What structure do they use instead?) Please and Thank YouIdentify the chemical basis for ApH and AY across the chloroplast thylakoid membrane by dragging the descriptions to their targets. Be sure to notice that the upper arrow iindicates ApH and the lower arrow indicates ΔΨ. ATP synthase complex H+ N ADP + P₁ Light energy ATP H*N Photosystem I/II- Chloroplast N side Aus PN ApH T + Thylakoid membrane HTp H+p Lumen Stroma P side Proton circuit A B High H concentration Low positive charge High positive charge Low H+ concentration Within the image, identify the types of proton translocation by dragging each label to its target. O XH₂ 2H+ + Z 2 H* ZH₂ O XH₂ Z 2H+ ZH₂ 2H+ C A B Proton pump Redox loopAsap
- Why would “knocking out” a gene for a chloroplast fatty acid desaturase (an enzyme involved in synthesizing fatty acids containing three double bonds) increase the rate of photosynthesis at 40°C, a temperature at which photosynthesis is normally impaired?Which of the following statements is/are TRUE for photosynthesis? The e- moves from H20 to NADP+. Some of the products from the dark reaction are required in the light reaction. It is an exergonic process that naturally by using energy from light It Involves conversion of 02 to H20 and C02 to glucose.Where does molecular oxygen (02) get generated during photo-phosphorylation? 1 Photosystem I Photosystem II 3 Cytochrome bf complex 4 Ferredoxin
