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A 0.20-mL sample of a solution containing H-3 that produces 3.7 x 10^3 cps is injected into the bloodstream of an animal. After allowing circulatory equilibrium to be established, a 0.20-mL sample of blood is found to have an activity of 20. Cps. Calculate the blood volume of the animal.
Why is the immune system so highly conserved, as other physiological systems are more specially adapted to our mammalian ancestry or hominid roots.
Why there are multiple origins of replication on eukaryotic DNA? a. To establish multiple copies of DNA simultaneously. b None of these is correct. c. To minimize errors in DNA replication. d. To reduce the time necessary for DNA replication
Using bacteriophage P22, you performed a three-factor cross in Salmonella typhimurium. The cross was between an Arg-Leu-His- recipient bacterium and bacteriophage P22, which was grown on an Arg+ Leu+ His+ strain. You selected for 1000 Arg+ transdu..
Natural selection raise the frequency of advantageous alleles. When a new allele is first created via mutation, it is at low frequency.
DIagram a chain of two RNA nucleotides. Use R for the nitrogenous bases. Then, briefly describe why RNA is usually single-stranded and why it is less stable than DNA.
K+ leak channels are found in the plasma membrane. These channels open and close in an unregulated random fashion. What of they accomplish in a resting cell?
Assume you have a gel filtration column with unknown matrix. Describe how do you experimentally deteremine its void volume and exclusion limit
Scientists believe that if there are no controls on the emission of CO2 from burning of fossil fuels, that concentration of this gas could double by the end of the current century, leading to a significant rise in the average temperture of earth. ..
Yeast grows as a haploid cell. In the wild type cells in presence of O2, the pH of mitochondrial matrix is 8, however in cells along with this mutant S gene, the pH is 7. Explain all these results.
If you wanted 10mL of a 1mM nitrophenol solution and you have on hand a 50mM nitrophenol solution, how would you make it. If you wanted 100mL of a 0.1M acetic acid solution, how much 17.4M acetic acid and how much water do you need to add to make t..
Would a plant performing CAM idling be more likely to be using cyclic electron flow or noncyclic electron flow in the light reactions? Explain
On average, cells in the Allium root tip divided about once per day. Assuming this is true for the specimen you examined, use your calculations of relative duration to determine how much time, in minutes, Allium cells spend in each phase of mitosi..
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