24)
24) Each of the following can be used in the Calvin cycle except A) phosphoglycolate. B)...
Calvin-Benson Cycle AG0 (kJ/mol) +70.0 Reaction Ribulose-1,5-bisphosphate CO2 H2O 2(3-phosphoglycerate) +H Enzyme Ribulose-1,5-bisphosphate carboxylase oxygenase ЕС Cofactors Regulation Notes 4,1.1.39 Mg2, cobalamin (B,2) coenzyme-A, NADH H Fe-S clusters, and possibly ATP Ribulose-1,5-bisphosphate (RUBP) behaves as an inhibitor by strongly binding to the activated form of the enzyme (ЕСM) Rubisco activase catalyzes the dissociation of RuBP from ECM Rubisco is very inefficient as a carboxylase It is probably the most abundant protein on earth; up to 50% of leaf protein is...
Draw how the chemical structure changes during the fixation phase of the Calvin Cycle (Ribulose-1,5-bisphosphate + CO2 --> 6-Carbon Intermediate --> 3-Phosphoglycerate). Include enzymes used and any byproducts formed. What enzyme mediates this change in Q3? What does it do? Are there any byproducts other than 3-Phosphoglycerate? Why or why not?
6) The Calvin cycle is a process by which plants convert CO2 from the air into sugars. Below is one step in that process where ribulose-1,5-bisphosphate is converted to 3-keto-2-carboxyarabinitol 1,5- bisphosphate (an unstable intermediate) by the fixation of carbon dioxide. Draw the curved arrow mechanism for each step in this process. OH OH B: PO OP PO, OP он OH ribulose-1,5-bisphosphate OH OP PO lfange 3-keto-2-carboxyarabinitol 1,5-bisphosphate
Nelson 46. The final product of the Calvin cycle is A) Ribulose Bisphosphate B) PGA C) АТР D)Glyceraldehyde-3-phosphate 47. Water vapor exits and Co, enters a leaf through the A) stomata B) grana C) porphyrin rings D) photons E) stroma 48. In a plant leaf, the reactions that produce NADPH occur in A) the light reactions alone. B) the Calvin cycle alone. C) both the light reactions and the Calvin cycle. D) neither the light reactions nor the Calvin cycle....
77. Of the following, which occurs during the Calvin cycle? a) Excited electrons are conveyed from chlorophyll to an electron acceptor b) Light energy is converted to chemical energy C) ATP and NADPH are synthesized d) Photons are absorbed e) CO2 is reduced 78. Which of the following occurs during the Calvin cycle? a) Linear electron flow produces the materials required for the fixation of carbon from carbon dioxide. b) Light energy is converted to chemical energy c) ATP is...
The Calvin Benson cycle use the energy trapped in ATP and NADPH generated by the light reactions to build sugars from CO2. What below is FALSE regarding this sugar-building cycle? Select one: a. Initially RuBP is carboxylated by RuBisCo where atmospheric CO2 is captured and put into the cycle. b. ATP and NADPH generated by the light reactions are used to reduce 3PG to a more energetic/reduced G3P (some of which will be diverted off to build sugar!) c. More...
What is the major product of the Calvin-Benson cycle that can then be used to form glucose? A)Acetyl-CoA B)glyceraldehyde 3-phosphate C)RuBP D)NADPH E)CO2 ----------------- In conjugation, F+ cells A)can transfer DNA only to other F+ cells. B)do not have conjugation pili. C)contain "jumping genes." D)serve as recipient cells. E)contain DNA R factors that can be shared. --------------------- The uptake of DNA fragments by competent cells is termed A)transformation B)the lac operon. C)conjugation. D)Penicillin E)Pentose phosphate pathway.
The fixation of CO2 into carbohydrates is catalyzed by Select one: a. ribulose 1,5-bisphosphate carboxylase b. thioredoxin c. rubisco activase d. 3-phosphoglycerate
12.9B - Which of the following is NOT a process in the Calvin Cycle? Oxidation of Rubulose Bisphosphate into Glucose Reduction of 3-Phosphoglycerate into G3P/PGAL Fixation of Carbon Dioxide All of these are processes in the Calvin Cycle Regeneration of RuBP from G3P/PGAL
Which of the following does not occur during the calvin cycle? a) oxidation of NADPH b) release of oxygen c) regeneration of the CO2 acceptor d) carbon fixation