Oftentimes, scientists face unexpected challenges as they work on resolving a certain problem. As you were working on resolving this environmental issue, you received a report from a group of environmental engineers who are working with you on this project showing that the bacteria you are intending to use is not found in high quantities in that area of the sea. Find a solution to this shortage by researching. In your answer be sure to discuss the role of the enzyme hydroxylase.

Your lab supervisor asks you to grow a new bacterium they got from a collaborator. You grow them in the suggested nutrient-rich media, and you notice that as the log phase growth progresses, the bacteria seem to turn purple.   You mention it to your supervisor and ask whether it is the gradient from very high to low nutrient bioavailability that induces metabolic changes which induces the production of a purple pigment. Your supervisor tells you that is unlikely. What is a more plausible conclusion

In a population of cyanobacteria (Chlorogloeopsis fritschii) in a hot spring in Iceland, some of the bacteria can produce chlorophyll f, while some C. fritschii produce only other types of chlorophylls.  Chlorophyll f absorbs light outside of the visible light spectrum, namely near infrared light, allowing the bacteria to absorb light that has not been absorbed or reflected by the water or other organisms.  The ability to produce chlorophyll f is heritable, and the bacteria with chlorophyll f can live in low-light environments, such as underneath other organisms, or near the bottom of the light-penetrating zone of the spring.  What is the adaptation in this population of C. fritschii living in low-light environments? (Choose one.)   a) the ability to produce chlorophyll f    b) the ability to produce any type of chlorophyll    c) the ability to tolerate the high temperatures of the hot spring   d) the ability to survive and reproduce

Hi can I get help on this microbiology question please? I am stuck and do not understand it. Thank you A prokaryotic cell hitched a ride to Earth on a space shuttle from some unknown planet. Microbiologists studied the microorganism and concluded it is a psychrophile, an obligate halophile, and an obligate aerobe. 1. Based on the characteristics of the microorganism described in this case, describe at least three characteristics that the unknown planet where the microorganism lived before must have so that it can survive in it. 2. Explain the following microbial characteristics or terms in complete sentences: psychrophile. obligate halophile. obligate aerobe.

Defend or refute this statement: The upper-temperature limit to life is unrelated to the stability of proteins or nucleic acids and how influential is microbial activity on the geological processes of mineral formation and deposition compared to biological processes? (argue both sides of this one). What challenges and advantages do you see with the use of extremeophiles in industrial or bioremediation applications?

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coli, mak you believe will grow faster (37° C or 30° C temperature) and why. Results• Time Absorbance 30 °C Absorbance 37 °C Generation time Generation time t=0 min at 30 °C at 37 °C 0.05 0.05 t= 20 min 0.06 0.07 t= 40 min %3D 0.1 0.16 0.28 0.21 0.44 t = 60 min t= 80 min %3D 0.95 Complete the graph. Make sure this figure has a description and all other labels are included. Once you have completed graphing the points, draw a best-fit line for each of your data sets by eye Questions: 1. Which data point can be the first to be considered in log phase for each line? (It will be the first point that seems to be described by your best-fit line.) For the 30° C culture the -minute point is the first one likely to be in log phase. For the 37° C culture the -minute point is the first one likely to be in log phase. Incubation Temperatures - Growth Bio 40- Fall 2019 Page 6

Escherichia coli O157:H7 is a foodborne pathogen and can cause serious illness in humans by producing toxins that can severely damage the lining of intestines and kidneys. What are the oxygen requirements of coli? What result would you observe in the MTM agar deep test? Explain. Research on the growth requirements of this bacterium is required. What is the role of oxygen and cytochrome c oxidase in aerobic respiration? Why does the nitrate reduction tube turn red after the addition of zinc? Clostridium tetani is a common soil bacterium and causes tetanus. Would you expect tetani to possess the enzyme catalase? Explain. Research on the growth requirements of this bacterium is required.

What are the unique problems associated with Nitrogen fixing organisms in terms of energy production and the need for low O2 tension to protect nitrogenase? Can you please describe in detail how Azotobacter and Rhizobium species solve these problems. Thank You

Match each organism with its most correct descriptor: A microbe that uses light energy in order to convert CO2 into organic carbon A microbe that uses light energy to break down organic compounds for further use in biosynthesis A microbe that uses the energy of sulfate reduction to convert CO2 into organic carbon [Choose] [Choose ] [Choose ] A microbe that can grow using only glucos✔ [Choose ] in the dark Photoautotroph Photoheterotroph Chemoheterotroph Chemoautotroph