discussion+1-20-11 (1)

discussion+1-20-11 (1) - Answer Reynolds # Question What is...

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Discussion  1/20/11 Office Hours this Sunday: 7-9 pm basement of the UGLI
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HW is due next Thursday 1/27 at the  beginning of class Remember to: Cite your sources Check your units Office Hours Tuesday 5:30 – 6:30 EECS  1500
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Question If glucose freely diffuses across the  membrane, how do cells keep glucose  from diffusing back out?
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Answer Phosphorylation
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Question How are membrane integral proteins  oriented in the membrane?
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Answer Alpha helix – easier for the protein to  move within membrane because H- bonding is within structure. Beta sheet  structures would have to detach and  reattach to neighboring structures with H- bonds to move Hydrophilic amino acids are oriented on  the interior of the helix where as  hydrophobic regions are on the exterior
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Question Why do bacteria stop and reach max  speed almost instantly when they  stop/start their flagella?
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Unformatted text preview: Answer Reynolds # Question What is the purpose of a vacuole? Answer Maintain turgor pressure In conjunction with cell wall maintains rigidity and structural stability. Question Name 3 reasons why mammals cant survive by using photosynthesis? Answer Surface area to energy production ratio Mobility We need energy at night as well! Question Briefly outline the ways mitochondria, bacteria and chloroplasts make ATP. Question Knowing that the energy of a particular photon is 2.925e-19 J, what wavelength light does this energy correspond to and subsequently what chlorophyll type absorbs this photon? Question Calculate the amount of energy the net yield of ATP resulting from respiration contains knowing that the amount of energy in 1 proton is 1.95e-20 J?...
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discussion+1-20-11 (1) - Answer Reynolds # Question What is...

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