BIOA02H3 Final: CHMA11_finalexam_2011.pdf

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11 Apr 2012

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BIOA02H3 Full Course Notes

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Mno4 (aq) + h2c2o4(aq) mn2+(aq) + co2(g: h, c, mn, o, consider a reaction that has a positive h and a positive s. The s for each species is shown below the reaction. 130. 7: 229. 2 j/k, -102. 4 j/k, +303. 3 j/k, -233. 1 j/k, +560. 8 j/k, which of the following compounds is the most viscous: Ch3och2ch3: there is not enough information, ch3ch2oh, ch3och2ch3, ch3ch2ch2ch3, hoch2ch2oh. Carbonic acid is a diprotic acid whose k a1 = 4. 3 10-7 and ka2 = 5. 6 10-11: 3. 56, 4. 31, 11. 00, 5. 50, 10. 44. 3: balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of h. [baf2: use hess"s law to calculate g rxn using the following information. Clo(g) + o3(g) cl(g) + 2 o2(g) Sn(s) sn2+(aq, 1. 8 m) ag+(aq, 0. 055 m) ag(s) Ni(s) ni2+(aq) ag+(aq) ag(s: ag+(aq, ni2+(aq, ag(s, pt, ni(s) 3 fe(s) + 4 h2o(g) fe3o4(s) + 4 h2(g)

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3. You are investigating an enzymatic reaction involved in the biosynthesis of an amino acid. Based on your knowledge of biosynthetic pathways, which of the following properties would you NOT expect to apply to the reaction? a. The reaction by itself will likely have positive deltaG. b. The reaction will be classified as spontaneous. c. This reaction may require coupling to ATP hydrolysis to proceed. d. The reaction is part of anabolism. e. In an energy diagram, the products of this reaction will be at a higher energetic level than the substrates.

4. Which of the following statements about reactions classified as spontaneous is NOT true? a. In a thermodynamic sense, the reaction has the capacity to proceed. b. This reaction will release energy. c. The activation energy barrier in this reaction is required to keep the reaction products stable. d. Energy needs to be added to this reaction to overcome the activation energy barrier. e. The reaction will have an overall negative change of Gibbs free energy.

5. Which of the following statements about photosynthesis is NOT true? a. Without the input of light energy, photosynthesis is an endergonic process. b. The final step of the photosynthetic electron transport chain leads to the production of oxygen from water. c. During photosynthesis, ATP is produced using ATP synthase. d. Photosynthesis creates a proton gradient. e. During photosynthesis, the dark reactions lead to the production of glucose.

When blood glucose levels are high, glucose is moved to the liver, where individual glucose monomers are linked together to form a storage molecule, called glycogen. This reaction is catalyzed by an enzyme called glycogen synthase. This reaction is both spontaneous and fast. Write ~1 paragraph discussing how you could change this reaction. Discuss how you could change the reaction so it is no longer spontaneous (note, focus on the reaction itself, not the transport into the liver). Then, discuss how you could keep the reaction spontaneous, but make it slower.

scarletferret345

Starch is digested by amylase. Which of the following statements would be true?

______________________

The digestion of starch by amylase is spontaneous.

The digestion of starch by amylase is endergonic.

Amylase supplies the energy needed for this reaction.

BIOA02H3 Final: CHMA11_finalexam_2011.pdf

BIOA02H3 Full Course Notes

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