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5 Written Questions

5 Matching Questions

  1. FAD
  2. Review of Glucose Catabolism
  3. Alcohol Fermentation
  4. Cytochromes
  5. Electron Carriers
  1. a - most of the molecules of the ETC
    - electron carriers that resemble hemoglobin in structure of their active site
    - functional unit contains a central iron atom, which is capable of undergoing a reversible redox reaction
  2. b flavin adenine dinucleotide
  3. c - categorized into three large protein complexes:
    a) NADH dehydrogenase
    b) the b-c₁ complex
    c) cytochrome oxidase
  4. d - Net amount of ATP = ATP by substrate level phosphorylation + ATP by oxidative phosphorylation
    - Substrate level = 1 glucose = ATP from glycolysis + (1 ATP x 2 turn of Citric Acid Cycle) ---> 4 ATP
    - Oxidative = 32 ATP
    - Total = 36 ATP
  5. e - occurs in yeast and bacteria only
    - pyruvate produced in glycolysis is decarboxylated to acetaldehyde, then reduced by NADH in step 5 of glycolysis to yield ethanol
    - pyruvate --> acetaldehyde --> ethanol

5 Multiple Choice Questions

  1. - ATP synthesis is directly coupled with the degradation of glucose without the participation of an intermediate molecule like NAD⁺
  2. - NAD⁺, FAD, NADP⁺
    - transport the high energy electrons of the hydrogen atoms to a series of carrier moelcules on the inner mitochondrial membrane (electron transport chain)
  3. - the sum total of all chemical reactions that take place in a cell
    - either anabolic (require energy) or catabolic (release energy)
  4. - adenosine monophosphate
    - PPi: phyrophosphate
    - ATP --> AMP + PPi + 7 kcal/mole
  5. nicotinamide adenine dinuclotide

5 True/False Questions

  1. FMN (flavin mononuclotide)- anaerobic: pyruvate is reduced through fermentation
    - aerobic: pyruvate is further oxidized during cell respiration in mitochondria


  2. The Citric Acid Cyle continued- known as the Krebs cycle or the tricarboxylic acid cycle (TCA cycle)
    - begins when the two carbon acetyl group from acetyl CoA combines with oxaloacetate, a four carbon molecule, to form the six carbon citrate
    - 2CO₂ are released, oxaloacetate is regenerated to use for another turn of the cycle
    - 1 cycle = 1 ATP produced by substrate level phosporylation via GTP intermediate
    - electrons are transferred to NAD⁺ and FAD, generating NADH and FADH₂, which transport electrons to electron transport chain


  3. Net reaction of photosynthesis6CO₂ + 2H₂O + energy --> C₆H₁₂O₆ + 6O₂


  4. Proton-Motive Force- as NADH passes its electrons to the ETC, free H⁺ are released and accumulate in mitochondrial matrix
    - ETC pumps these ions out of the matrix, across the inner mitochondrial membrane and into intermembrane space at each of the three protein complexes
    - the continuous translocation of H⁺ creates a positively charged acidic environment in the intermembrane space


  5. Metabolic Map...


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