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(a) develop a general mathematical relationship for the number of surface atoms (N_s), number of volume atoms (N_v), and total atoms (N_t) for cubic particles in terms of "n," where n = number of atoms along a side of cubic nanoparticle.
(b) How is Ns/Nt for cubic particles related to that for square particles in:
equation 1: N_s=4n-4equation 2: N_t=n^2
? Explain.
(c) Plot the fraction of surface atoms (N_s/N_t) vs particle size (n*d) for cubic (3-D) particles, where d = atom diameter. Use a logarithmic particle size scale for n = 3-100.
(d) On the same graph, plot surface area-to-volume ratio (S_v) vs. particle size.
These experiments demonstrated that DNA is the genetic material of phage and that protein does not transmit genetic information. Can this same experiment be carried out with 35S and 14C? Describe it.
Assume that decomposers were removed from the forest ecosystem; predict what would happen to the rate of nitrogen cycling. Explain the logic behind your prediction.
You have identified that flame wing (fw) is linked to blue eyes (be) and short legs (sl) on chromosome 2. You cross a fw, be, sl fly with flies containing various deletions within the 200 Kb.
Select a specific gene and a specific alteration. Explain the effects of the modifications and why it might contribute to the cancer.
Although the primary transcript of a gene may be identical in two different cell types, the translated mRNAs can be quite different.
Aquatic leaf at 10 percent salt solution under the microscope. The next question ask me to reverse the procedure by adding 1-2 drops of DI water.
In a hypothetical population's gene pool, an autosomal gene, which had previously been fixed, undergoes a mutation that introduces a new allele, one inherited according to incomplete dominance.
A student encounters an animal embryo at the eight-cell stage. The 4-smaller cells that comprise one hemisphere of the embryo seem to be rotated forty-five degrees and to lie in the grooves between larger, underlying cells.
The definition of antigen and the chemical characteristics of antigens, The definition of antigen and the chemical characteristics of antigens, haptens and how they become antigenic.
Discuss genetic factors and genes are involved in making a human embryonic stem cell differentiate into a cardiomyocyte. Also what miRNA are involved in the regulation of this process of the proteins that do so.
List two possible mutations that might cause this phenotype. Be as specific as possible about the location of mutation. What led physician to make this diagnosis, and what might have caused the sudden attack.
According to your results would you say that the radish has a broad pH tolerance? Why or why not? Use your data to support your answer.
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