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1. Where is genetic material found in plant cells?
2. Mitochondria are the only organelles that contain their own DNA (circular) and have a double membrane. Why do you think this might be so?
Hint 1: Where else do we see circular DNA?)
Hint 2: What do you know about the relative age of eukaryotic cells?)
3. How is the structure of the plant%u2019s cellulose-based cell wall related to its function?
4. Defects in structures of the cell can lead to many diseases. Pick one structure of a eukaryotic cell and develop a hypothesis as to what you think the implications would be if that structure did not function properly.
5. Using books, articles, the internet, etc. conduct research to determine if your hypothesis was correct.
Assume you have a set of 4-Hfr strains and you carry out a series of crosses with a multiply marked recipient that is auxotrophic for many different nutritional markers.
Which mutagen, aflatoxin or acridine orange an intercalating dye would most likely lead to an increased incidence of pancreatic cancer. Explain your answer.
You have stock solutions of 10 M KCl and 100 mM HEPES buffer, pH 7.5. You are asked to prepare a 100 mls of 100mM HEPES buffer containing 0.35 mM KCl. How would you make this buffer solution?
If you transform bacteria with the plasmid library made in part b above, divide the transformatnts into 20 aliquots and find one has the insert of interest, now how many clones do you need to screen.
Which statement about night blindness is most accurate.
Discuss similarities and differences of homeostatic mechanisms for thermoregulation in ectothermic and endothermic animals.
A cross is made between 2 E. coli strains: Hfr arg+ bio+ leu+ (x) F- arg- bio- leu-. Interuppted mating studies show that arg+ enteres the recipient last, so arg+ recombinants are selected on a medium containing bio and leu only.
Oxygen is the final electron acceptor of this pathway. Glycolysis is the only energy yielding step of this pathway.
A transmembrane protein in outer membrane of the nuclear envelope would least likely be found later in which one of the following cellular locations?
Determine the role the innate and adaptive immune system in controlling cancer formation and progression and compare and contrast the tumor promoting and inhibitory capabilities of the immune system.
After a few minutes, the light should begin to look brighter. Even as this is the case, add a card and see if you can still see light. Repeat this process of gradually adding cards over a 15-minute period. Were you able to detect an increasingly dim ..
In what two different ways do bacteria "sense" the amount of trp in the environment? Describe both mechanisms in detail. What are two hypotheses for the role of RNA silencing.
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