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The uniform arrangement of the backbone carbonyl oxygens and amide nitrogens in an α helix gives the helix a net dipole, so that it carries a partial positive charge at the amino end and a partial negative charge at the carboxyl end. Where would you expect the ends of α helices to be located in α protein? Why?
Comparison of a homeodomain protein from yeast and Drosophila shows that only 17 of 60 amino acids are identical. How is it possible for a protein to change over 70% of its amino acids and still fold in the same way? Can you mention one example?
In 1968 Cyrus Levinthal pointed out a complication in protein folding that is widely known as the Levinthal paradox. He argued that because there are astronomical numbers of conformations open to a protein in the denatured state, it would take a very long time for a protein to search through all the possibilities to find the correct one, even if it tested each possible conformation exceedingly rapidly. Yet denatured proteins typically take less than a second to fold inside the cell or in the test tube. How do you suppose that proteins manage to fold so quickly?
Why does the gene get copied in the Mitochondrial DNA before the original gene is transferred into the nucleus?
q. at puberty the adolescent female body changes in both structure and function of several organ systems primarily
It appears that plants are adapting to herbivory. How do the mechanisms described within the paper assist herbivores?
How could you infer what type of volcano erupted in a given area based on the type of debris found
when blood oxygen-hemoglobin saturation percentage decreasesto 50% the individual. The enteric nervous system receives its inputs from
What are the three embryonic tissue layers that form during early development and what do they eventually form (in general)?
A variety of squash may be long, round, or oval in shape. The color may be yellow, green, or white. A long, white variety crossed with a round, green one (both true-breeding) produces only oval, yellow F1's.
A mutation occurs in Gene A that prevents RNA transcription from terminating where it is supposed to. Explain what affect, if any, you believe this mutation will have on.
Write a assignment on topic : BLOOD, Write on topic with total 1000 words count.
Computer programs that scan double-stranded DNA for regions that potentially encode polypeptides have been developed. How many potential reading frames do these programs have to explore to find all possible encoded polypeptides? Explain.
Note whether the pathogen you chose was reported as a risk to the workplace in the Infectious Diseases in the Workplace article you read on the Home page.
Phenylalanine deaminase positive and phenylalanine deaminase negative culture. Determine the purpose of the uninoculated control? What other types of controls would be useful to increase reliability of the test?
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