Using the glyoxylate cycle, a germinating plant can convert two molecules of acetyl CoA into one molecule of succinate. Considering that succinate is an intermediate of the CAC, how many molecules of acetyl CoA are required for the production of one molecule of glucose in a germinating plant? 02 04 06 08
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- Oil is a major energy-storage molecule in most seeds. During seed development in some plants, oil (triacylglycerols) is synthesized using acetyl CoA derived from sucrose. The developing seed also contains RuBP carboxylase, although the Calvin cycle is not active. (a) How does the carboxylase maximize the effi ciency of converting starch into oil? (b) The seeds that contain RuBP carboxylase are green, suggesting that they harvest some light energy. Explain why some energy collection would be useful in the developing seed.ENUMERATE the protein amino acid produced by plants from the following precursors. Ribulose-1,5-bisphosphate/ Calvin cycle Pyruvate a-ketoglutarate Oxaloacetate Phosphoribosylpyrophosphate Shikimic acid pathwayFor 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.
- Based on the vein density results and your knowledge of how the light treatments would impact the light reactions of photosynthesis, how can you explain the high starch concentration and low photosynthetic capacity value in symplastic loader individuals grown in low light and transferred to high light for one week prior to the measurements? Figure Legend: Figure 1. Spinach is an apoplastic phloem loader, while pumpkin is a symplastic phloem loader. An experiment was performed where spinach and pumpkin individuals were grown under three conditions LL - in low light environment (grey bars) HL- in high light environment (white bars) LL->HL in low light environment and then transferred to a high light environment for one week prior to measurements (dark stripes bars) The following measurements were performed on individuals of the two species growing in the three different treatments: vein density, starch content in leaves, and photosynthetic capacity. Statistical tests were performed…Which intermediates pass between plant mitochondrion and the glyoxysome during the functioning of the glyoxylate cycle?The herbicide dinoseb, which was removed from the market many years ago, killed plants by uncoupling oxidative phosphorylation. Ironically, plants have embedded in the inner membrane of their mitochondria a protein named the “uncoupling protein” that essentially can carry out the same process caused by dinoseb. The mechanism of uncoupling oxidative phosphorylation involves which of the following scenarios. A. Excess electrons oxidize lipids in the mitochondrial membranes, thus destroying the electron transport chain B. Excessive oxygen is consumed via reduction to water, thus depriving the mitochondria of the ability to carry out phosphorylation that requires oxygen C. The membrane selectivity required to maintain a proton gradient is altered so the potential for driving ATP synthesis via chemiosmosis is degraded D. Uncoupling oxidative phosphorylation kicks a cell into a fermentative pathway that cannot supply sufficient ATP
- In the same oak leaf that absorbed 15,440 photons, how many CO2 molecules are fixed to produce the glyceraldehyde-3-phosphate molecules that are used as building blocks for hexose sugars?Name the respiration pathway in the plants that is alternative to glycolysis and where does this takes place? *Complex II proteins are present in both Arabidopsis and Viscum. However, the amount of ATP produced by this complex is only about 60% of the ATP produced by Complex I, III, or IV. This lower yield of ATP is due to… A. The absence of nad genes associated with Complex I B. The comparatively low quantities of respiratory metabolism proteins in the electron transport chain of mistletoe C. The flow of electrons does not result in additions to the proton gradient and thus cannot be used to drive ATP formation via chemiosmosis D. The flow of electrons generates heat used for thermogenesis instead of oxidative phosphorylation
- What exactly allowed for plants to grow larger in structure and size? was it the cellulose microfibrils produced by the rosette-shaped synthase complex?In 150 word count with reference answer the below question The equation for photosynthesis is 6CO2 + 6H2O + Sunlight --> C6H12O6 + 6O2. Explain the role of each of the products (left side of the arrow) and explain where the products (right side of the arrow) came from.Four species in the Chenopodiaceae were found to have one cell C4 photosynthesis. Givee 3 biochemical properties that could establish that these are C4 plants rather than C3 plants. For each property, describe and explain the test result or data you would expect if the plant is C4 rather than C3.