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Q1. The proteins RhaA and RhaB are formed by the Rha Operon. Find out that there is a regulator protein Rha O that binds to the Rha operator sequence and activates transcription of the Rha operon. Rha O is encoded by a separate gene.
You find a mutant bacteria cell that is able to express a normal RhaA protein but no RhaB protein. You isolate mRNA from the bacteria and find that there are normal levels of both RhaA and ThaB mRNA. List two possible mutations that might cause this phenotype. Be as specific as possible about the location of mutation.
Q2. Sami has been hospitalized with acute gastritis. Her symptoms were epigastric pressure (just above the stomach), headache, nausea, and vomiting. She revealed that she had been suffering back pain and drank four shots of gin and took three aspirin to "kill the pain." What led physician to make this diagnosis, and what might have caused the sudden attack?
Small molecules move through membranes in different ways -- different for different molecules or compounds, that is.
q. chooses the statement that best describes a buffer.1. a buffer resists change in ph by accepting hydrogen ions when
Find two studies that research communities. Can you determine if they are working under the assumption of open or closed community structure? What is that evidence?
Describe how you understand chemical and electrical gradients. Give examples from the body.
A cell attempts mitosis with only one spindle pole, but is otherwise normal. Which of the following is true for this cell?
Liposomes are promising molecules in gene transfer technology because of their similarity to cell membranes and their charge interactions with negatively charged DNA.
The MN blood group is determined through a single gene with two alleles M and N. A Navajo population in New Mexico was tested for this blood group.
Prepare an essay on nosocomial infection.
What if we add specific membrane characteristics into the mix? Let's say that you also find a fossil record of a different, related antelope species that apparently had motor neurons with different characteristics.
Although the primary transcript of a gene may be identical in two different cell types, the translated mRNAs can be quite different.
Draw a chain of 2 RNA nucleotides. Use R for the nitrogenous bases. Then, briefly explain why RNA is usually single-stranded and why it is less stable than DNA. Modify the drawing before to explain.
How do the flagellum and the stalk in Caulobacter cells help with nutrient acquistion in an oligotrophic (nutrient poor) enviornment?
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