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Phenyl-Sepharose resin consists of a phenyl group attached to a matrix of agarose. Suppose you need to use this chromatographic method to separate a mixture of polypeptides consisting of polyalanine, polyserine, polytryptophan and polylysine. Would you apply these polypeptides in a buffer containing high ionic strength or low ionic strength? What buffer would you choose (choose from one of "Good's buffers" (find a list online)? How would you elute the polypeptides, and what would be the order of elution?
Without grazing, goldenrod is the superior competitor. It outcompetes the other vegetation and becomes strongly dominant in the field. Small herbaceous plants and grasses become less common.
Describe how the water vascular system functions. What is the benefit of this adaptation for these animals?
Dynein is missing from cilia and flagella of the individual with a specific inherited disorder. These individuals have severe respiratory problems, and if males, are sterile. What is the structural relationship between these 2 symptoms.
Red-green colorblindness is a sex-linked trait. A normal woman whose father was red-green colorblind marries a normal man. What is the expected proportion of color-blind children? Five both the phenotypes and genotypes, including gender.
What triggers your body to take a breath? Explain what part of the brain stimulates breathing and what aspects of body chemistry are important in controlling the rate and depth of your breathing.
In humans, oogenesis in comparison to spermatogenesis is different in that. cytokinesis is unequal during the meiotic divisions.
How could you explain the occurrence of birth defects (caused by altered genes) in children and grandchildren of WWII atomic bomb victims, while the victims themselves were only mildly affected.
Explain the experiments, their expected results, and your conclusions. You may suppose that you have an unlimited budget and an Institutional Review Board with very strict guidelines for research in humans.
Determine which organelle found in plant cells is responsible for converting sunlight energy into the chemical energy found in sugar molecules?
In drosophila the recessive autosomal bw causes brown eyes by blocking synthesis of the red pterin pigments and the recessive sex-linked ve causes bright red (vermillion) eyes by blocking synthesis of the brown xanthommatin pigment. Double mutant ..
How do you explain why enhancers can be moved around within the DNA without affecting their activity, whereas the TATA box can only operate at one specific site?
Thiol proteases are a widely distributed group of proteases with a mechanism somewhat similar to that of the serine proteases the family of enzymes which includes chymotrypsin.
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