Without looking in chapters 21 and 22, predict some characteristics that would describe niches occupied by green and purple photosynthetic bacteria.
The nutrition is universal factor that is required to carry out actions and metabolic function of all the organisms. The nutrition is need by the cells or microbes or animals to carry out various functions. Moreover, the nutritional need of the microbes can be varied in the form of energy, electron, and carbon source.
Explanation of Solution
The photolithoautotrophs can acquire light as the source of energy, reduced inorganic substances and gain electrons, and finally able to fix carbon dioxide from the electron that is obtained by the reduction of inorganic compounds. For example, Cyanobacteria, Green sulfur bacteria, purple sulfur bacteria, and Photosynthetic protists. The photolithotrophs are anaerobic that does not need oxygen as their terminal electron, whereas organic compounds, sulfur, and hydrogen sulfide are gained as the terminal electron. As these microbes can effectively utilize the inorganic compounds, they are able to live in sulfur vents in the deep ocean waters. Moreover, these photolitotrophic bacteria have pigments known as bacteriochlorophylls that can absorb light range from 350-550nm, which can penetrate deep into the water.
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Chapter 11 Solutions
Prescott's Microbiology
- Which of the following statements is correct for bothblue-green algae and bacteria ?(a) Both show anaerobic respiration.(b) Both have chlorophyll pigment.(c) Both are devoid of true nucleus.(d) None of the above Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.arrow_forwardPredict some characteristics that would describe niches occupied by green and purple photosynthetic bacteriaarrow_forwardFor Green and Purple Bacteria which of the given statement is true, (1) utilize non-cyclic (2) do not produce oxygen during utilize bacteriochlorophyll photophosphorylation photophosphorylation (4) carry out photophosphorylation without the use of the proton motive force (5) all of the abovearrow_forward
- Why might chemosynthetic communities exist only in places like the deep-ocean floor rather than across a wide range of land and sea habitats, the way photosynthesis-based communities are?arrow_forward. The anaerobic, chemoautotrophic archaeobacterium Methanococcus jannaschii uses which of the following carbon-fixation pathways to obtain organic carbon from CO2? the Hill reaction the Wood-Ljungdahl pathway the Calvin cycle oxygenic photosynthesis the Krebs cyclearrow_forwardExplain wellarrow_forward
- The unicellular cyanobacterium Prochlorococcus sp. is the most abundant photosynthetic microbe in tropical and subtropical oceans. At least two ecotypes exist: one is adapted to high light and the other to lower light intensities. How does the presence of these two ecotypes contribute to their physiological success and their numerical success? How would you determine the amount of fixed carbon they contribute to these open-ocean ecosystems?arrow_forward29. A culture of green algae was kept at a constant temperature and subjected to periods of dark and light. It consumed an average of 7 cm3 of oxygen per hour by respiration in either light or dark conditions. When in light conditions, it produced an average of 23 cm3 of oxygen per hour of photosynthesis. What is the net volume of oxygen produced by the algae over a 24-hour period consisting of 14 hours of dark followed by 10 hours of light? * A. 38 cm3 B. 62 cm3 C. 132 cm3 D. 160 cm3arrow_forwardNote: Diagram 4 may also be helpful in answering the questions. Use the information in order to answer questions #28 -31. Diagram 7: Rate of Photosynthesis with increasing light intensity 200 150 100 50 -50- -100 100 200 300 400 500 600 700 Light Intensity (arbitrary units) Glossary: 1. Pmax: The maximum pressure of oxygen gas. 2. Arbitrary units: The use of this term mean the graph is not using specific units as labels. Light intensity could be measured in lumens and oxygen production could have been measured in mm of Hg elect the best explanation for the oxgen production leveling off as the light increases in intensity. O More light reduces the activity of the chlorophyll by breaking the pigment down. More light prevents water from getting to the leaf cells to be split. OHigher light intensity has less blue and red wavelengths Photosystem l and Il in the light dependent reactions have a maximum limit on how many light photons they can capture w their chlorophyl pigments. Photons…arrow_forward
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