Photorespiration occurs when rubisco combines RuBP with which of the following molecules? O glyceraldehyde 3-phosphate O CO$_2$ O O$_2$ O H$_2$O
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It is a process that competes with photosynthesis. In photosynthesis, rubisco combines RuBP with $CO_2$ to produce two molecules of 3-PGA. In photorespiration, rubisco combines RuBP with $O_2$ instead of $CO_2$. This results in the production of one molecule of Show more…
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During photorespiration (a) RuBisCO binds with $\mathrm{O}_{2}$ (b) Phosphoglycerate and phosphoglycolate is formed (c) Sugar is not synthesized (d) All the above
1. Photorespiration is the process by which RuBP (substrate) has ______ added to it by Rubisco, instead of ________ as happens during photosynthesis Ozone; CO2 CO2; O2 O2; CO2 O2; CO 2) Photorespiration can occur when carbon dioxide levels are ________. high low when the stomata are closed to prevent water loss during droughts A and C B and C 3) The phosphoglycolate is salvaged by a series of reactions in this order or organelles: peroxisome, ________, and again in the peroxisome. mitochondrion chloroplast amyloplast Golgi True-False Questions 1) In normal aerobic environments and saturating levels of light, an increase in CO2 concentration will result in an increase in the rate of CO2 fixation in C3 plants. 2) C4 photosynthesis is so named because it produces a four-carbon organic acid as the first stable product of carbon fixation.
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If photosynthesizing green algae are provided with CO2 synthesized with heavy oxygen (18O), later analysis will show that all but one of the following compounds produced by the algae contain the 18O label. That one is ... O2 1,3-bisphosphoglycerate RuBP (ribulose bisphosphate) Glucose G3P (glyceraldehyde 3-phosphate)
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