27) Energy absorbed by a photon can raise an e to a higher orbital. Upon return

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27) Energy absorbed by a photon can raise an e to a higher orbital. Upon return to the lower energy state all of following are possible EXCEPT: (A) Dissipation of the energy as heat (B) Resonance transfer of the energy to an adjacent molecule (C) Release of a higher energy photon at a shorter wavelength (D) Loss of the electron (oxidation) (E) ALL are possible outcomes ca In the overall stoichiometry of the light reactions, 8 photons of light generate (A) 102 (B) 2 NADPH C) 3 ATPs 28) 14 H' to a gradient (E) ALL are generated You are a biochemist for NextGenSugar Inc., who have generated several sugar analogs, but don't know anything about their metabolism. At your disposal is radioactive 29) labele supplement with these analogs and incubators that allow you to control oxygen. The first class of compounds you distinguish are those that can enter cells and those that cannot. This is based on incubating cells with sugar analogs and seeing if the cells picked up radioactivity; no radioactivity meant that particular analog was not a substrate for GLUT1 transporter, or otherwise could not enter the cell. The following data are from experiments ONLY done with the sugar analogs that were picked up by cells. d sugar analogs, mammalian cells that grow in growth medium you can (A) After setting O2 levels to 0 in the incubator, you incubate the cells with media containing only individual sugar analogs alone. Of the 55 compounds tested 30 result in all the cells dying. Of the 30 compounds that caused cells to die, I did allow the production of much radio-labeled lactate per mol consumed compared to glucose. What enzyme was a metabolite of this sugar not a substrate for, and what radiolabeled chemical as i would these cells have high levels orubrtrale r cells weste r ahalog allowed ATP generation for 2 hr, but then cells died. They also failed enzyme was inhibited? to acidify their media, suggesting no lactate production. What (B) You now test the 25 compounds that allowed survival without oxygen in a full oxygen environment. Surprisingly, 1 of these compounds now caused the cells to grow slowly and quickly acidify their media. What enzyme does this analog inhibit? When you grow cells with the radioactive version of this analog and glucose together you now notice all TCA intermediates are radioactive. How did this happen? i an OAw Ol

Explanation / Answer

27) The answer is D.. loss of elctron (oxidation) does not happen.

28) The answer is E. All are generated.

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