Summary: Case 7: A Little Tale From Long, Long Ago
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Read the summary and the most important questions on CASE 7: A little tale from long, long ago
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1 What is the structure and function of mitochondria?
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What is the main function of the folded membrane, called cristae, in the mitochondria?
To give a greater surface area for chemical reactions to happen. -
What is the mitochondrial DNA containing 37 genes good for?
The production of mitochondrial-specific proteins. -
2 How is energy produced in mitochondria?
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After food molecules enter the matrix of the mitonchondrion, how does energy in the form ATP produce?
- Acetyl-COA
- Citric acid cycle
- Oxidative phosphorylation
- Acetyl-COA
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2.1 Citric acid cycle
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After Acetyl-COA is put in the citric acid cycle, what kind of high energy electrons will the cycle harvest?
- NADH
- FDH2
- ATP or GTP
- NADH
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2.2.1 Complex I: NADH dehydrogenase
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What does the NADH dehydrogenase in complex I do with the produced electrons in the oxidative phosphorylation?
NADH -->NAD + &H + -
2.2.2 Complex II: Fumerate reductase
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Complex II contains succinate dehydrogenase, which transforms succinate into reductase. During this process, FADH2 is formed. What does FADH2 do?
It passeselectrons to ubiquinol -
2.2.3 Complex III: Cytochrome bc1 complex
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Where do the protons that arrive in complex III get pumped to?
Theintermembrane space -
2.2.4 Complex IV: Cytochrome c complex
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What does complex IV do after receiving the electrons that were passed on through cytochrome c?
Bind them to O2, forming H2O -
2.2.5 Complex V: ATP synthase
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Complex V will pump protons to the matrix forming, togheter with ADP, how many ATP?
28 to 32 -
3 The effect of dinitrophenol in mitochondria?
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If DNP stops the ATP production by letting the proton moving force collapse. What is produced in ATP's place?
Heat
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