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Archaebacteria is an organism that converts the carbon dioxode to methane by a process called methanogenesis. In this process H2 is the donor of reducing equivalents and Co2 is the electron acceptor. In archabacteria,the electron transport chain can be run in reverse. In this direction, the energy in the proton gradientis used to drive the reduction of CO2 to HCOOH and ultimatley th CH4 rather than reducing power driving the formation of a proton gradient as in typical electron transport. The H2 provides the reducing equivalents that are further transferred via other electron carriers.
a. Which way are the protons flowing during reverse electron transport chain? From the acidic outside to the basic inside or from the basic inside to the acidic outside?
b. During the normal electron transport chain which way are the protons floeing? From the acidic outside to the basic inside or from the basic inside to the acidic outside?
c.During the normal electron transport chain what is the trend inreduction potentials and what do the vaues mean?
What was the purpose of inoculating the base broths? would a positive result in any of them affect the rest of the exercise? why?
A certain cell, which is surrounded of an extracellular, hypertonic environment, needs to move a molecule of sucrose out of the cell. What type of transport mechanism would it use? (Only choose one)
A pH profile shows that the pH optimum for an enzyme is from pH5 to pH9. Assuming that the pKas for the side chains of the amino acids are unaltered from their normal values,
Assume you are an ecologist studying a population of gerbils that can be found in nature with three different colors. An individual gerbil can be, dark brown, medium brown, or light brown.
Which of the following statements best describes the sporophyte of hornworts?
Assume you and your lab partner have made the following artificial membranes: Membrane made entirely of phosphatidylcholine with saturated 16-carbon fatty acids Membrane.
ONPG solution has a concentration of 10 mM. The molecular mass is 301.25. What is the percent composition of this solution?
What series could you use to make a beta barrel with twelve antiparallel strands? Write out one repeat of the sequence as follows: M-(your sequence) 12.
You have developed a keen interest in the adaptive immune system and plan on dedicating your scientific career to the study of this elegant system!
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You just harvested either a BM or PB sample and found very few metaphases under the phase-contrast microscope. What might be the possible reason in terms of specimen handling, culture setup, harvesting, and slide preparation?
Sudden addition of oxygen (O2) to a previously anaerobic culture of yeast fermenting grape juice results in a dramatic decrease in the rate of glucose consumption. This is known as "Pasteur effect".
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