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G-protein-linked receptors activate G proteins by reducing the strength of GDP binding. This results in rapid dissociation of abound GDP, which is then replaced by GTP, which is present in the cytosol in much higher concentrations than GDP. What consequences would result from a mutation in the alpha subunit of the G protein that caused its affinity for GDP to be reduced without significantly changing its affinity for GTP? Compare the effects of this mutation with the effects of the cholera toxin.
Discuss the criteria for diagnosing puerperal infection. What structures may be involved in a Puerperal infection?
Determine what can be a reasonable explaination that some animals were found to have high levels of antibodies, but no such viral nucleic acids could be detected?
Explain the events required for the activation of T lymphocytes. How can controlling the receptors involved can be used as experimental treatments for autoimmune diseases?
The enzyme Bromelin is a cysteine protease from pineapple that utilizes a similar mechanism to serine proteases except the serine is replaced by a cysteine. Draw the mechanism of peptide hydrolysis by Bromelin.
A man and a woman each have one sickle-cell anemia allele. He is color blind, while she is a carrier for color-blindness. What is the probability that a daughter will have both full-blown sickle-cell anemia and be colorblind?
The hormone insulin regulates glucose concentration in the blood by metabolic changes. Finish the flowchart below by moving the labels to the correct targets.
Identify an animal or plant that you can find somewhere nearby within some hours - it can live in the city, town, country, a lake, ocean, mountain, etc as either an r or a K
Determine which types of cells can we derive continuous cell lines? From which types of cells can we? Derive finite cell lines? From which types of cells do we derive mature differentiated cells?
Action potentials are usually generated at axon hillock and propagated down axon away from the cell body. If you experimentally depolarized an axon to the threshold level at a point halfway down the axon, what would happen.
Describe why an anaerobic indicator strip in an anaerobic environment will revert to blue if it gets wet.
Dynein is missing from the cilia and flagella of individuals with a specific inherited disorder. These individuals have severe respiratory problems and, if males, are sterile. What is the structural connection between these two symptoms?
How is the lifestyle of many radially symmetrical animals different from that of bilaterally symmetrical animals? Explain how the body plan complements the lifestyle using two animals as examples.
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