CHEM 181 Chapter : woc 21- manipulating genes in our food.docx

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CHEM 181 Full Course Notes

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1/3 of europeans believed that tomatoes contain genes only if they have been genetically engineered. Even when pasteurization came about, people fought it, saying that ingesting dead bacteria was bad and that it took out all of the nutrients from milk. Even now they say similar things, saying that raw milk is a freedom of choice. No one can guarantee that genetically engineered food will have no pitfalls. We cannot promise it to be 100% safe, but it is also silly to only partake in things that are 100% safe (take airplanes, for example). Important to note is that just because big pharma benefits (makes money), this does not mean that it is bad for us. A lot of research has gone into genetically engineered foods and its safety aspects. This was detected and the soy beans were never marketed: we don"t ban other foods that people have allergies to, and these are more prevalent.

Related Questions

A virus that contains the enzyme reverse transcriptase and an RNA genome is a _______

	vaccine
	retrovirus
	genetically engineered virus
	bacteria
	recombinant DNA

4.63. â A genetically engineered strain of Escherichia coli (E. coli) is used to synthesize human insulin for people suffering from type I diabetes mellitus. In the following simplified reaction scheme, bacteria consume all of the limiting reactant under aerobic conditions and produce insulin and biomass.

C6H12O6 + aNH3 + bO2 = pC2.3H2.8O1.8N (insulin) + qCH1.9O0.3N0.3 (biomass) + rCO2 + sH2O

Feed containing 150 mM glucose (that is, 150 103 mol C6H12O6/L) and 50 mM ammonia enters a bioreactor at a rate of 100 L/h. Pure oxygen enters the reactor as a gas at the same molar flow rate as the ammonia. The product stream leaves at a rate of 100 L/h. The respiratory quotient (see Problem 4.62) RQ 0:50 mol CO2 produced/mol O2 consumed, and the molar ratio of biomass to insulin produced in the reaction is 1.5. The system operates at steady state.

(a) Determine the six stoichiometric coefficients and the limiting reactant.

(b) What are the fractional conversion of glucose and the production rates (g/h) of insulin and biomass?

Felder, Richard M.; Rousseau, Ronald W.; Bullard, Lisa G.. Elementary Principles of Chemical Processes, 4th Edition (Page 199). Wiley. Kindle Edition.

Help with b-e would be appreciated - I'd like to check my answers before turning in. TY!

Genetically engineered streams of Essen eruvim colt have become essential tools in the production of recombinant human peptides and proteins. One of the first sub- the synthesized using engineered E coli was recombinant human insulin or humbling, for the treatment of people suffering from type I diabetes mellitus. A simple fiction scheme for the production of humbling is described below. Bacteria consume glucose under aerobe conditions, and produce humbling and biomass C_6 H_12 O_6 (glucose) + O_2 + NH_3 (ammonia) rightarrow C_2.3 H_2.8 O_1.8 N (humulene) + CH_1.9 O_0.3 N_0.3 (biomass) + CO_2 + H_2O A typical humbling production scheme consists of k. coli cultured in a large bioreactor. A continuous stream of media is fed into the reactor. A continuous products and unused reactants is removed from the bioreactor for further processing, including purification of the humbling for therapeutic use. Media containing glucose and ammonia is fed into the reactor at a rate of 100 L/hr; the concentrations of glucose and ammonia in that stream are 150 mM and 50 mM, respectively. Pure oxygen gas is sparked (i.e., bubbled) into the reactor at a rate of 100 mL/min. The exit flow rate of liquid containing biomass, product, and excess reactant is 100 I7hr. Assume that there is no it coagulation in the system. Assume that the reaction goes to completion. Write element balances for C, H, O, and N. Write two additional balance equations given the following information: The ratio of humbling to biomass production is 1:5. Solve for the stoichiometric coefficients to balance the equation. Determine the inlet molar flow rates of glucose, oxygen, and ammonia in mol/hr. In this bioreactor, temperature is V10 K and pressure is 1 atm. Determine the limiting reactant, the reaction rate tR), and the fractional conversion of glucose, Calculate the molar flow rates of all constituents leaving the bioreactor. The it sired output of the bioreactor is 1 kg/day of humbling. Can this output be achieved by increasing the oxygen flow rate.' Justify. Acetic acid (vinegar) can be produced via the reaction:

CHEM 181 Chapter : woc 21- manipulating genes in our food.docx

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