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Deinococcus radiodurans is a bacterium that was isolated from cooling ponds in and around nuclear power plants. It is highly resistant to ionizing radiation. Propose an hypothesis to explain the high level of radiation resistance and an experiment to test your hypothesis.
Why does washing the membrane with a buffer containing high concentrations of salt.
Consider a specific codon in the genetic code that normally codes for an amino acid. Change the wobble position nucleotide to a different purine and the result is a stop codon.
The error rate of transcription is much higher than the error rate of replication. Explain why this is not a problem for cells?
Cytopathic and non-cytopathic viruses elicit very different immune responses. The primary determining factor in the type of immune response to a viral infection is which of the following (select one)?Answer
what are the 4 major macromolecules and list their building block, solubilty in water(hydrophobic/hydrophilic), and specific example of a polymer for each and where it is found
NMR spectroscopists often do experiments in D2O. The deuterium atoms in D2O can exchange for hydrogens in an organic molecule if and only if those hydrogens are exposed to solvent and are attached to polar atoms.
Suppose that the field of view is at 400x total magnification is 0.26mm. Determine the height of onion cells pictured below from and image observed at 400x.
You are the lead engineering in charge of running a single chemostat reactor (75 L) to produce a therapeutic protein from an engineered organism.
Assume your TA gives you a bacterial culture and claims there are 4.8 x 107 bacteria/mL in the culture. To check up on her, you prepare serial dilutions of 10-4 - 10-7.
Currently, three fossil skulls of Homo sapiens, dating to about 160,000 years BP, were discovered in eastern Africa. These skulls fill a gap between the 100,000 year old H. sapiens.
In a separate study, authors showed that deletion of FtsH restores CII following heat induction, but not following SOS (DNA damage) induction. Would you expect CII to be stabilized or activated during DNA damage? Briefly explain why.
How might the choosing of the more prevalent codon
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