1. The cyanobacteria transformed Earth's atmosphere from anaerobic to aerobic conditions, during their first two billion years of photosynthesis (6CO2 + 12H2O ™ CH12O6 + 602+ 6H;O), by the production of which molecule? A. CH12O6 B. diatomic oxygen C. glucose D. carbon dioxide E. CO2
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- Which of the following pathways requires molecular oxygen (O2)? a. aerobic respiration b. lactate formation c. alcoholic fermentation d. photosynthesisCyanobacteria are O both a and b O heterotrophic phototrophic25. By taking in inorganic carbon, in the form of CO2, Cyanobacteria began the accumulation of free oxygen in Earth's atmosphere. Which chemical process below was used by Cyanobacteria? (LS2-5) Cellular Respiration Photosynthesis Combustion O Fermentation
- Which microbes were the first to evolve oxygenic photosynthesis following the evolution of porphyrin rings, and thus were responsible for first converting Earth's atmosphere from anaerobic to an aerobic environment? algae green plants cyanobacteria O strict/obligate aerobic bacteria35. Identify the inorganic carbon-containing substrate molecules which are used by the green sulfur bacteria during their photosynthetic reaction (6CO2 + 12H,S " CH12O6 + 6S2 + 6H,O). A. hydrogen sulfide B. elemental sulfur C. carbon dioxide D. glucose E. waterComplex 2 oxidizes ___ and reduces __ a. FAD, COQ b. COQ , Cytochrome C C NADH, COQ d. Succinate, Coenzyme Q
- 1. What are the products of photosynthesis? 2 What are the reactants of cellular respiration? 3. Why do we need nitrogen fixing bacteria? 4. List at least 2 reasons why living things need nitrogen.1- Organisms which prepare food for themselves using simple naturally available raw materials are referred to a- Heterotroph b- Autotroph c- Monograph d- None of the above 2- In the absence of which of the following will photosynthesis not occur in leaves? a- Guard cell b- Chlorophyll c- Vacuole d- Air space 3- Which of the following raw material is available in the air for photosynthesis? a- Oxygen b- Nitrogen c- Carbon dioxide d- Carbon 4- Potato and ginger are both underground parts that store food. Where is the food prepared in these plants? a- Root b- Stem c- Leaf d- Flower 5- When measuring the limiting factors effect on the photosynthesis rate, the saturation point is a- Limiting factor b- Optimum level c- Gradient d- Constant levelThe methanogens:_______ A. are part of the domain Archaea AND appear only in aerobic environments. B. oxidize hydrogen gas to produce methane AND appear only in aerobic environments. C. use oxygen as a terminal electron acceptor AND appear only in aerobic environments. D. use oxygen as a terminal electron acceptor AND oxidize hydrogen gas to produce methane. E. are part of the domain Archaea AND oxidize hydrogen gas to produce methane.
- 4. Identify the organic carbon-containing product which is generated by the green sulfur bacteria during their photosynthetic reaction (6CO, + 12H,S " A. hydrogen sulfide B. glucose C. carbon dioxide C,H12O6 + 6S2 + 6H2O). D. waterDuring his flight, Ikaris detected microorganism X in the abyssal zone of the Indian Ocean. X fixes atmospheric carbon dioxide via the Calvin cycle, and oxidised inorganic compounds as electron donors. X is most likely a a. Chemolithoautotroph b. Photolithoautotroph c. Photoorganoheterotrophs d. ChemoorganoautotrophThe main product of fossil fuel combustion is CO 2 , which increases atmospheric CO 2 .Scientists proposed situating algal containers near industrial areas. Considering theprocess of photosynthesis, how does this arrangement make sense to you? Justify yourthought.
