In glycolysis, the name of the enzyme that converts dihydroxyacetone phosphate t
ID: 176325 • Letter: I
Question
In glycolysis, the name of the enzyme that converts dihydroxyacetone phosphate to glyceraldehydes-3-phosphate is triose phosphate isomerase aldolase aldoketase none of the above How does the action of the enzyme malate dehydrogenase make its product less stable than its substrate? It moves similar charges closer to one another in the molecule. It creates a beta-keto acid. It restricts the freedom of its substrate by changing the geometry of one atom from tetrahedral to trigonal planar It converts a ketone to an aldehyde. It actually results in a product nearly as stable as its substrate. Four of the steps in the citric acid cycle are oxidation redaction reactions. How many of these use NAD^+ as a cofactor? 0 1 2 3 4 The last two steps of the citric acid cycle convert to succinate, malate citrate, isocitrate malate, oxaloacetate fumarate, oxaloacetate isocitrate, alpha-ketogluterate If [S] is greater than K then the velocity, v, will be 1/2 V_max 1/2 V_max none of the above Significantly elevated blood serum concentrations of IgD could be associated with individuals suffering from cancer parasitic infection anemia HIV infection autoimmune disease A protein with quaternary structure described as alpha_3beta_4 would be a homoheptamer heteroheptamer heterodimer homodimer homotrimer In the biosynthesis of vitamin C, the last step involves the oxidation of two sulfhydryl groups adjacent carbon atoms methionine ATP prolineExplanation / Answer
55) A. Triose phosphate isomerase
56) B. It creates a beta keto acid. (oxaloacetate)
Malate dehydrogenase catalyses the conversion of malate to oxaloacetate by the reduction of NAD+ to NADH.
57) D. 3
58) C. Malate, Oxaloacetate
59) E. None of the above
Km = [S] that gives V0 = 1/2 Vmax.
At very high [S], V0 is independent of [S], V0 = Vmax
60) A. Cancer
61) B. Heteroheptamer
62) B. Adjacent carbon atoms
the last step involves the oxidation of Galactono 1,4 lactone to ascorbic acid by the enzyme galactono 1,4 lactone dehydrogenase.
References:
1. http://www.iwmf.com/sites/default/files/docs/bloodcharts_ig.pdf
2. http://www.plantphysiol.org/content/145/4/1408/F6.expansion.html
3. http://dergiler.ankara.edu.tr/dergiler/24/1716/18327.pdf
4. http://ucce.ucdavis.edu/files/datastore/608-93.pdf