5. lipids.memb handout

5. lipids.memb handout - Electron transport chain Lipids...

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Electron transport chain Lipids and biological membranes Book: Life (8 th ed., Sadava et al.) Reading: Ch. 7 pp. 147-157 Ch. 3 pp. 54-57 Ch. 5 pp. 96-116
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Exam dates will remain unchanged Exam 1: Monday, Sept. 29 Exam 2: Monday, Oct. 20
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(Also known as the Citric Acid Cycle or Krebs cycle)
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How does the cell harvest free energy released in chemical reactions? Substrate-level phosphorylation Energy can be transferred, in the form of electrons, when one substance is oxidized (by losing electrons/energy) and another is simultaneously reduced (by gaining the electrons/energy). The free energy from such redox reactions drives a process called chemiosmosis which is used to generate ATP. Phosphate is transferred directly from one molecule to ADP. The energy released from phosphate removal can be used add a phosphate group to ADP, resulting in the production of ATP. Oxidative Phosphorylation
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Oxidation-Reduction (redox) reactions are those involving the transfer of electrons Every oxidation reaction must be accompanied by a simultaneous reduction reaction The substance that becomes oxidized gives up energy as it releases electrons; the substance that becomes reduced receives energy as it gains electrons Redox reactions in cells often involve the transfer of a hydrogen atom (H + + e - )
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(oxidized form) (reduced form) Nicotinamide adenine dinucleotide
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Electron transport chain Free energy stored in NADH is used to create a
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This note was uploaded on 09/16/2008 for the course MCDB 120 taught by Professor Johncarlsoncarolbascom-slackfrankslack during the Fall '07 term at Yale.

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5. lipids.memb handout - Electron transport chain Lipids...

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