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Your colleague is perplexed - he tells you that he's monitoring the EMT in the mice by evaluating expression of Twist and Snail (known to be required for the EMT), which do increase as he observes the tumor cells breaking through the basement membrane of the colon epithelium. He's looking at their expression via immunoblots. But he's confused because b-catenin levels stay about the same and he expected them to increase. You reassure him that this observation is consistent with the EMT. What is your explanation and what simple experiment can you suggest that would demonstrate your explanation?
Suppose a scientist observes an abnormality in the growth of robin embryos in a certain area. What flaws, if any, can you find in this experiment that might lead you to question the scientist's conclusions?
Suppose you have a solution containing both salt (NaCl) and glucose, and dialysis tubing with a pore size that allows the passage of Na+ and Cl- ions, but doesn't allow the passage of glucose. How could you remove essentially all of the salt from ..
Some might argue that the conformational change of proteins is the single most important concept in biochemistry.
Explain the dose-response relationship between exercise and risk of death from coronary heart disease.
Which of the following includes Highest levels of hierarchy?
Determine what pattern of relatedness would you infer among four individuals based only on the following sequences from the same place in their chromosomes?
A taxon of living bacteria uses the same electron transportchain for both aerobic respiration and photosynthesis. It is thought that this is an ancestral trait in prokaryotes. What does this suggest about the evolution of metabolism?
1)Explain transcription and translation in detail 2)Explain DNA replication
Summarize the effects histamines can have on the body. What is the purpose of an antihistamine?
What is the geologic timescale? How is it organized? List some major events and dates in this timescale.
Could RNA have been the original site of information storage in the primitive cell? A difficult problem with this possibility is that
In what stage of cell division does the DNA replicate?
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