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In the recessive condition in humans known as sickle-cell anemia, the beta-globin polypeptide of hemoglobin is found to be abnormal. The only difference beteween it and the normal beta-globin is that the sixth amino acid from the N-terminal end is valine, whereas the normal beta-globin has glutamic acid at this position. Please explain how this occurred in terms of differences in the DNA and the mRNA.
Describe briefly the molecular forces (on the atomic level) that govern the interaction between molecules?
How do respiration and/or photosynthesis affect homeostasis in a living organism.
if you could cook any meal for your family .what would you make? describe the meal and tell how you would make it .describe your favorite season tell what kinds of things you like to do during that season.invent a new kind of sandwish.tell what 's..
sketch the chromosomes of the parents and the F1. analyse interference and say what you think of its significance.
Hair splits most easily along its fiber axis, whereas fingernails tend to split across the finger (sideways) rather than along it. What are the directions of the keratin fibrils in hair and in fingernails? Explain your answer in molecular terms.
Assume you have a pure breeding mutant donkey that has very large teeth and very large ears. Both phenotypes are completely recessive to the normal phenotype.
How many possible alleles are there for any given gene? Is there only one recessive allele for a gene? Is there only one dominant allele for a gene? Is an allele always recessive or dominant with respect to other alleles of the gene?
Determine volume of the sodium citrate in order to make up 7.5% solution. A solution needs 250 ml of a 7.5% (w/v) solution of the tri sodium citrate.
How can we use what we know about this process to construct a timeline showing when various sequence changes occurred and when they lead to the modern sequences that we know today?
Assume you are given a primer with a concentration of 1.4 mg/ml, RNA concentration of 0.8 mg/ml, 1M MgCl2, 10mM dNTP mix, 10x buffer, 10 units/ul of reverse transcriptase.
Discuss how do fossils provide evidence for the theory of continental drift and explain how do fossils help scientists piece together the family tree of a given plant or animal?
Assume if there is no color change after the addition of the reagents noted in #4, zinc is added to the culture. What purpose does thezinc powder serve and What is the oxygen requirement of organisms that are able to reduce nitrates?
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