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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.
What chemical property of the leucine residues thought to form tight ring that prevents the passage of ions within the channel of the acetylcoline receptor suits them for this role.
Compare and contrast, in depth, the cellular processes of mitosis and meiosis. Include interphase in your explanation. Chromosomal movement and status must be included in your answer. You may include a diagram to explain your answer but you should..
Assume if a eugenic sterilization law were universally enforced, such that all feebleminded individuals were sterilized before reaching sexual maturity.
Discuss common pathways of DNA mutation – chemical – slippage during replication – keto, enol flux, physical energy.
What fraction of demes in each set is likely to become fixed for allele A1 versus A2. Explain the differences in head movement available to fish.
Genes are necessary part of cells. However, much of our genome is composed of "junk DNA," and things that just do not work. One gene that does not work in humans is the LGGLO gene.
Explain the probability that the first child of parents who are heterozygous for both traits will show the achondroplasia however not the Huntington's disorder?
Jennifer has the stomach flu that is going around campus and has been vomiting profusely for the past twenty-four hours. Not only has she been unable to keep down fluids or food.
Illustrate the main types of faults and corresponding directions of stress. Differentiate between fault and joint. How does the stress differ between the two? Of what importance are these fractures to other geological processes.
Lakes would suffer a nutrient depletion in surface layers. Evaluate the sizes of the different digestive organs in the earthworm. Which organ is the main? How does its size make it well suited for its function.
A man with hemophilia marries a woman whose family has no record of hemophilia. Their first child is a son. The couple is worried that their son may have inherited hemophilia. What are the chances of a hemophilic son.
Write down a detailed lab report on Separation and detection of proteins. Your report must include Title, Introduction, Materials and methods and three references for this report.
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