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Published byChristiana Carroll Modified over 8 years ago
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Biochemistry Review / Crash Course
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Classification of monosaccharides classified by type of carbonyl group aldoses - polyhydroxylaldehydes ketoses - polyhydroxylketones
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Classification of monosaccharides classified by number of carbons trioses - 3 carbon sugars –aldehydic triose or aldotriose –ketonic triose or ketotriose tetroses pentoses hexoses heptoses etc.
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Cyclic hemiacetals formed by intramolecular reaction represented by Haworth projection formulas -D-glucopyranose (Haworth projection) pyran D-glucose (linear form)
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Anomers cyclization forms a new asymmetric carbon two possible stereoisomers could result inconvert in a process called mutarotation -D-Glucopyranose -D-Glucopyranose
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Cyclic hemiketals furan D-fructose (linear form) -D-Fructofuranose
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Disaccharides Glucose anomer of Maltose -D-Glucopyranosyl-(1 4)- -D-glucopyranose
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Disaccharides Glucose Fructose Sucrose -D-Glucopyranosyl-(1 2)- -D-fructofuranoside
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Polysaccharides (glycans)
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Storage Polysaccharides: Amylose
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Branch Main chain starch (amylopectin) branches every 24 to 30 glucoses glycogen branches every 8 to 12 glucoses Storage Polysaccharides: Amylopectin
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Amylopectin amylase Free Glucose molecules hydrolysis
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Preparatory Phase of Glycolysis (figure 14-2a)
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Payoff Phases of Glycolysis (figure 14-2b)
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Overall Glycolysis: produces two ATP, two NADH, and 2 pyruvates from 1 glucose
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Two Types of Energy-Yielding Metabolism aerobic (or respiration) –utilization or consumption of O 2 to make pathways go forward anaerobic (or fermentation) –final electron acceptor is not O 2
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Fate of Pyruvate
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Formation of Ethanol
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Thiamine Pyrophosphate (TPP)
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Reactions Catalyzed by Thiamine 1) -keto acids decarboxylation
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Reactions Catalyzed by Thiamine 2) -condensation reactions pyruvate α-acetolactate
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Formation of Ethanol
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Nicotinamide
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Nicotinamide Adenine Dinucleotide
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