Tuesday, January 8, 2008

13 - biochemistry mcqs - 98 TO 107 - glycolysis

98 - Thiamine pyrophosphate , functions as an ________ sink that acts to stabilize the carbon ion adduct formed during the decarboxylation of pyruvate .

answer is electron sink .

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99 - phosphoglycerate kinase converts 1 , 3 bisphosphoglycerate to 3 phosphoglycerate and forms an ATP .

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100 - the irreversible rate determining step in glycolysis is catalysed by ?

answer is PFK .

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101 - pentose phosphate pathway is also called hexose monophosphate shunt .

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102 - the molecule which conserves the free energy of metabolite oxidation for ATP synthesis ?

NADH .

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103 - The molecule which conserves the free energy of metabolite oxidation for reductive biosynthesis ?

NADPH .

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104 - 6 phosphogluconolactonase ------- 6 - phosphogluconate

6 phosphogluconate dehydrogenase ------------ RU5P

glucose 6 phosphate dehdrogenase -------- first committed step in HMP pathway

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105 - The process of fermentation has greater thermodynamic efficacy under physiological conditions than under standard biochemical conditions ?

the above statement is true .

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106 - under aerobic conditions glucose is oxidised during glycolysis and the coenzyme _________ is reduced and subsequently oxidised in a process known as electron transport ?

NAD +

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107 - in muscle a 10 % decrease in ATP concentration , results in a 100 % increase in ADP concentration and 400 % increase in AMP concentration .

true .


TO READ COMPLETELY ABOUT GLYCOLYSIS CLICK HERE

TO KNOW MORE ABOUT HMP SHUNT CLICK HERE

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