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13 Cards in this Set
- Front
- Back
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Catabolism of glucose is what kind of reaction?
Why do we do this? |
catabolism is OXIDATION of glucose (pulling off the H's)
We do this to break down food sources and make fuel. |
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What kind of biosynthesis is anabolism?
What is required to carry this out? |
anabolism is REDUCTIVE biosynthesis.
This requires use of ATP. The electron donor is ususally NADPH |
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How many ATP's are usually made from one glucose molecule?
Of those, how many do not come from oxidative phosphorylation? |
36-38 ATP's are made from one glucose molecule.
4 ATP arise from substrate level phosphorylation in Glycolysis. |
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Why is Fe2+ the reduced form of iron vs. Fe3+?
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Fe2+ GIVES AWAY an electron and becomes more positive because of it (becoming Fe3+, the oxidized form).
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Is NADH+ H+ the reduced or oxidized form?
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NADH is the REDUCED form because it has accepted 2 H+ ions. (GER).
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Describe the Lactate Dehydrogenase Rxn.
Why does this rxn have a stupid name? What is one main purpose for this rxn? |
Pyruvate + NADH (LDH) ---> Lactate + NAD+
Because it is named for its reverse reaction. Lactate is actually the reduced form here. To re-oxidize NAD+ for use in the TCA cycle. |
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In the LDH reaction - which compound (other than NADH/NADH+ is reduced? Oxidized?
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Pyruvate is the oxidized form. It has fewer H's (it wants to get H's from NADH)
Lactate is the reduced form it has H+ to lose. |
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Describe the Succinate Dehydrogenase rxn?
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Succinate + FAD+ (Succinate Dehydrogenase)--->Fumarate + FADH2.
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Which compound is reduced/oxidized in Succinate Dehydrogenase rxn?
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Succinate is the reduced form - it has H+ to give to FAD+
Fumarate is the oxidized form - it has lost electrons. |
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NAD+ oxidizes what compounds in glucose metabolism?
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NAD+ oxidizes alcohols and aldehydes
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FAD+ oxidizes what?
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FAD+ oxidizes and alkane to an alkene.
Succinate is an alkane and Fumarate is an alkene. |
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What is the most oxidized state of carbon starting with Ethane....
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Ethane-->ethanol (or ethene) -->acetaldehyde --> acetic acid --> CO2.
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Free energy change tells us if rxn is going to be favorable or not.
What equation are we supposed to know? What should we remember about units? |
deltaG = deltaG' + RTln[prod]/[react]
remember to make prod/react units in M instead of mM (8mM becomes 8X10^-3 M) |
