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?
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- Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2Which part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?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?
- Which of the following scenarios does not occur during the reduction phase of the Calvin Cycle? Hide answer choices Each molecule of 3-phosphoglycerate is phosphorylated by ATP to form 1,3-bisphosphoglycerate. Each molecule of 1,3-bisphosphoglycerate is reduced to glyceraldehyde 3-phosphate by the addition of two electrons from NADPH. Glyceraldehyde 3-phosphate is converted into Ribulose bisphosphate. Some of the glyceraldehyde 3-phosphate molecules are used in carbohydrate production.For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase can be used more than once. Calvin cycle can be organized into 3 basic stages. During the stage, the enzyme catalyze the fixation of by ribulose biphosphate. For each CO2 and RuBP, two molecules of get formed. During the phase, and are used to convert 6 molecules of 3-PGA into G3P. During the phase, one molecule of G3P leaves the Calvin cycle to contribute to the formation of other compounds needed by the plant. The remaining 5 molecules of G3P regenerate . This enables the system to fix more . 3-phosphoglycerate NADPH fixation ATP pyruvate reduction…Which of the following approaches would be the best way to detect the lack of photosystem II in some photosynthetic organisms? Determine whether they have thylakoid membranes. Determine whether they consume CO2 in the dark. Determine whether they produce O2 in the light. Determine the action spectrum for photosynthesis in these organisms.
- Photorespiration is a multienzyme bypass of the Calvin cycle's CO2 fixation process in plants and all other oxygenic phototrophs. This bypass removes and recycles 2-phosphoglycolate, a damaging by- product of photosynthesis in the presence of 02, which is formed when 02 substitutes CO2 in the CO2 fixation pathway. Discuss the situation of fixing 02 (oxygen) rather than CO2 (carbon dioxide) in plants.Complete the following table to compare the electron-transport phase of cellular respiration with the light-dependent reactions of photosynthesis.What are the stages of the Calvin-Benson cycle? Select all that apply. The resulting unstable six-carbon molecule splits into two three-carbon molecules of PGA. ATP and NADPH are used to convert PGA molecules to PGAL. Most of the PGAL is used to regenerate RuBP, but some is exported to the cytoplasm to produce carbohydrates. Rubisco attaches CO2 to a five-carbon organic compound called RuBP. Rubisco is used to convert PGA molecules to PGAL.
- 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 correctExplain, using a simple diagram, the relationship between acyclic photophosphorylation (photophase) and the Calvin cycle (dark phase).How 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
