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Hydrogen peroxide decomposes to water and oxygen. Discuss the molecular mechanisms behind the difference in rates or activation energy of the uncatalyzed reaction, the reaction catalyzed by ferric ions, and the reaction catalyzed by the enzyme catalase. Why is the activation energy barrier essential for life as we know it? Why is it an advantage to the cell that enzymes that generate as well as break down hydrogen peroxide (catalase) are compartmentalized within the membrane-bound peroxisome?
Describe how the cell derives additional energy by switching . What was the key factor that determined this change.
A 0.02 M weak acid solution was measured to have a pH of 4.6 determine the [H+] in the solution and compute the acid dissociation constant,
Describe the etiology and genetics of the disease phenylketonuria (PKU). Phenylketonuria (PKU) refers to a disease found in the humans in which the affected individual does not have enzyme phenylalanine hydroxylase.
Assume you are an ecologist studying the effects of acid precipitation on plant life. Explain an experiment you would perform in order to determine which plant species will be a useful indicator species for acid rain pollution.
Describe the function (role) of each of the following major vegetative tissues in plants: epidermis, cortex, xylem, phloem, pith, mesophyll.
Biochemists make stock solutions of reagents and use them to make working concentrations of buffers. Explain how to construct these stock solutions. You decide on the final volumes and show your calculations
A mammal uses only one to two percent of its energy in ventilation as a fish must spend about 15 percent of its energy to move water over its gills. Explain this huge difference in their efforts to collect oxygen.
On a particular microscope, the numerical apertures of the condenser and medium power objective lenses are 1.25 and 0.25, respectively. You are supplied with a filter that selects a wavelength of 520nm.
How does Cancer progression occur? and how will a person know when its rampantly spreading?
A double stranded DNA virus has 200,000 base pairs.find out the number of nucleotides present.
You solve the structure of a non-specific RNA binding protein and find a pocket of K and R amino acids. Explain a possible mechanism for the protein-RNA interaction.
Hypereutrophication is a major environmental concern. Describe aquatic systems that are hypereutrophic, including the causes/sources of the hypereutrophication. Also, state the problems associated with hypereutrophication that are faced by the bio..
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