A Native American tradition uses a "tea" made by soaking willow bark in water as a pain-reliever. Does it work? Why?
What will be an ideal response?
Yes, it works. The willow bark contains high levels of salicylic acid, which is the active ingredient in aspirin.
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Which of the following is not a way chromatin remodeling complexes affect nucleosomes?
A. They can slide a nucleosome to a different location. B. They can modify the N-terminal tails of histones. C. They can eject a nucleosome from the DNA. D. They can replace the nucleosome with a new nucleosome that contains a variant histone. E. All of these choices are correct.
Cells that have undergone a response that causes them to enter a permanent state of growth arrest, like those that comprise a mole are said to have entered a state called
a) adolescence b) senescence c) pubescence d) bellioscosity
One milliliter of blood with contain the same amount of alcohol as ___ milliliters of expired breath.
Fill in the blank(s) with the appropriate word(s).
The first step in the formation of urine is the
A) secretion of hydrogen ions into the kidney tubules. B) formation of filtrate that enters Bowman's capsule. C) secretion of urea into the renal pelvis. D) reabsorption of nutrients by Bowman's capsule.