18.2 glycolysis

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12 Terms

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glycolysis

  • 1st stage of aerobic respiration, occurs in cell’s cytoplasm

  • breaks glucose (6-carbon molecule) → 2 pyruvate molecules (3-carbon) through series of reactions involving specific enzymes

  • doesn’t require oxygen = anaerobic process

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describe the process of glycolysis

  1. glucose phosphorylation

  2. lysis

  3. phosphorylation of TP 

  4. dehydrogenation

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substrate-level phosphorylation

formation of ATP w/out involvement of electron transport chain. after glycolysis, if oxygen available, pyruvate moves through mitochondrial membranes by active transport

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name the site of glycolysis

cytoplasm

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reactants of glycolysis

  • 1 glucose molecule

  • 2 ATP molecules

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products of glycolysis

  • 4 ATP molecules

  • 2 reduced NAD molecules

  • 2 pyruvate molecules

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net energy gain of glycolysis

  • 2 ATP molecules

  • 2 reduced NAD molecules (per glucose molecule)

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roles of glycolysis products

pyruvate + reduced NAD contribute to later stages of cellular respiration for greater energy yield

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glucose phosphorylation

.

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lysis

.

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phosphorylation of TP

.

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dehydrogenation

.