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Question: William Astbury discovered that the x-ray diffraction pattern of wool shows a repeating structural unit spaced about 5.2 Å along the length of the wool fiber. When he steamed and stretched the wool, the x-ray pattern showed a new repeating structural unit at a spacing of 7.0 Å. Steaming and stretching the wool and then letting it shrink gave an x-ray pattern consistent with the original spacing of about 5.2 Å. Although these observations provided clues to the molecular structure of wool, Astbury was unable to interpret them at the time. Given our current understanding of the structure of wool, interpret Astubury's observations. Explain why wool sweaters or socks will shrink when washed in hot water or heated in a dryer whereas silk does not shrink under the same conditions.
The one hundred mile Leadville Marathon is being held on a very hot day and you are running the medical tent. A runner is brought in unconscious and with severe dehydration.
The research team used the setup to study the incorporation of labelled nucleotides into culture lymphocytes and found that the lymphocytes incorporated the labelled nucleotide at significantly higher level after a pathogen was introduced into the cu..
Methods for Assaying/Detecting Viruses, Write a paragraph to teach to the rest of the class one of the following techniques used to assay/detect a virus.
Suppose that the breeder selects plants that mature in 69 days for the next generation. Approximation the time required for the next generation to mature. What kind of infection do you believe she has in this hand.
Assume that there are 63 different naturally occurring amino acids. If all 64 possible combinations of bases for a codon resulted in coding for 63 different amino acids and one stop codon, which of the next mutations would NOT be possible.
Think about these two facts, the alpha-subunit of the G-protein trimer has an intrinsic GTPase activity, determine which is important in terminating the action of G-protein coupled systems.
Calculate how the permeability of each is altered when the pH is reduced to 1.0, a value typical of the stomach.How to demolish the function of this protein.
A casino paid 28,000 for a grilled cheese sandwich that was purported to have an image of the Virgin Mary on it.
What are the dissimilar types of energy we learned about it. Recognize one technique presently being used to alter the genetic makeup of an organism, and explain how humans can advantage from this change.
A women is perspiring profusely with rapid breathing, breath smells like acetone and blood sugar is 650mg/ml, blood chemistry indicates acidosis, what is her diagnosis, is it hypoglicemia, but thrown off by rapid breathing.
Dentinogenesis imperfecta is a tooth disorder involving the production of dentin sialophosphorprotein, a bone-like component of the protective middle layer of teeth.
Distinguish between mechanical advantages and disadvantages in lever systems and find out which kind of lever the doctor was using to test quadriceps muscle.
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