CHEM 181 Lecture : Pesticides

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champagnefish105

18 Apr 2012

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In canada, only corn, canola and soya are grown genetically modified. 100% of chicken and 93% of beef served in u. s. fast food restaurants had been fed exclusively a corn based diet. Must look at benefits and risks, make sure the benefits outweigh the risks. Used to be a weed, through the ages, it has turned useful. Gene: sequence of dna that occupies a specific location on a chromosome and determines a particular characteristic in an organism. Order in which dna bas pairs are arranged, determines code. First commercial use of genetic modification is in the making of cheese. Before we could synthesize, it came from animals. Rennet found in stomach of calves: to better digest mother"s milk. Makers of cheese running out of chymosin. 1990- found gene present in cows to produce chymosin. Use nm to modify composition of food: ex. Tomatoes rich in lycopene, oils enhanced in monounsaturated fats, flax with increased omega-3, broccoli with increased sulforaphane.

Related Questions

1.What is the purpose of adding the InstaGene matrix to thesolution containing your

plant cells? What happens if you transfer some of this matrix toyour PCR reaction?

2. What are the general steps in the genetic modificationprocess of plants? What

specific sequences are we trying to detect in transgenicfoods?

3. What is the purpose of running PCR reactions for each samplewith primers from

the plant photosystem II gene?

ivorykoala123

1) In the citric acid cycle, a five-carbon compound is decarboxylated to yield an activated four- carbon compound. Show the substrate and product in this step, and indicate where any cofactor(s) participate(s).

2) CO2 is produced in two reactions in the citric acid cycle. For each of these reactions, name the reactant and product, name the enzyme, and show how any cofactors participate.

3) In which reaction of the citric acid cycle does substrate-level phosphorylation occur? 4) Explain in quantitative terms the circumstances under which the following reaction can

proceed.
L-Malate + NAD+ Â® oxaloacetate + NADH + H+ DG'Â° = +29.7 kJ/mol

5) You are in charge of genetically engineering a new bacterium that will derive all of its ATP from sunlight by photosynthesis. Will you put the enzymes of the citric acid cycle in this organism? Briefly explain why or why not.

6) Germinating plant seeds can convert stored fatty acids into oxaloacetate and a variety of carbohydrates. Animals cannot synthesize significant quantities of oxaloacetate or glucose from fatty acids. What accounts for this difference?

CHEM 181 Lecture : Pesticides

CHEM 181 Full Course Notes

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