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Organic
(predominantly composed of Carbon, Hydrogen and Oxygen atoms). By principle, some
carbohydrates readily react with oxygen gas to produce carbon dioxide and water vapor,
explain why this principle doesn’t spontaneously work on organic polymer wastes such as
Polyethylene terepththalate (PET) and Polystyrene (PS)?
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- Organic polymers have a similar composition to that of common carbohydrates (predominantly composed of Carbon, Hydrogen and Oxygen atoms). By principle, some carbohydrates readily react with oxygen gas to produce carbon dioxide and water vapor, explain why this principle doesn’t spontaneously work on organic polymer wastes such as Polyethylene terephthalate (PET) and Polystyrene (PS)?Cellulose is water insoluble, despite its many OH groups. Based on its three-dimensional structure, why do you think this is so?In solution, glucose exists predominantly in the cyclic hemiacetal form, which does not contain an aldehyde group. How is it possible for mild oxidizing agents to oxidize glucose?
- Glucose-1-phosphate has a ΔG°′ value of −20.9 kJ/mol, whereas that for glucose-6-phosphate is −12.5 kJ/mol. After reviewing the molecular structures of these compounds, explain why there is such a difference in these values.In the 1970s, a process was developed thatconverts the glucose in corn syrup to its sweeter-tasting isomer, fructose.High-fructose corn syrup, a common ingredient in soft drinks and processedfood, is a mixture of glucose and fructose. What type of isomers are glucoseand fructose?Threonine has two chiral centers. Draw L-threonine and indicate which carbon atoms are chiral. Which carbon atom is responsible for d and L configuration?
- What product is formed when a solution of A and B is treated with mild base? This reaction is the first step in the synthesis of rosuvastatin (sold as a calcium salt under the trade name Crestor), a drug used to treat patients with high cholesterol.Propanamide and methyl acetate have about the same molar mass, both are quite soluble in water, and yet the boiling point of propanamide is 486 K, whereas that of methyl acetate is 330 K. Explain.Glucose can be used as a monomer to produce two different polymers, starch and cellulose. What is the molecular difference between these two?
- You have 10 mg/ml ethidium bromide solution. If you add 5 µl of this to 50 ml of agarose gel solution, what will be the final concentration of ethidium bromide in the gel solution in mg/ml?The net charge on the most prevalent form of bisphosphoglycerate in blood is what?One critical function of chondroitin sulfate is to act as a lubricant in skeletal joints by creating a gel-like medium that is resilient to friction and shock. This function seems to be related to a distinctive property of chondroitin sulfate: the volume occupied by the molecule is much greater in solution than in the dehydrated solid. Why is the volume so much larger in solution?