Question

1. Liver pyruvate kinase is activated by dephosphorylation in response to glucagon.

answer true or false

2. Glycolysis is regulated primarily by:

phosphorylation of phosphofructokinase.

three strongly exergonic, nonequilibrium reactions.

three strongly endergonic, nonequilibrium reactions.

the availability of glucose-6-phosphate.

allosteric effectors of pyruvate kinase.

(only one answer for number 2)

3. Flux through the pentose phosphate pathway is controlled mainly by the NADP⁺/NADPH ratio in the cell.

answer true or false

Answer 1

1. True

1. True , The liver pyurvate kinase stimulate the dephosphorlyation to convert glucose to glucose 6 phosphate in process of glucolysis.

2. Three strongly exogeneric non equilibrium reaction( At first glucose converted in to glucose-6 -phosphate then glucose-6- phosphate will be converted in to 6-p-gulconolactone . then 6-p-gluconoconverted in to 6 phosphogluconate then it finally converted in to pyruvate these three reaction are mentioned in the answer)

3. True (The flux in the pentose phosphate pathway will be controlled mainly by NADP+/NADPH because glucose 6 phosphate to 6 phosphogulconolactone and 6 - phosphogluconate will be converted to ribluose 5 phosphate the NADP+ / NADPH are need. so to maintain flux of NADP+/NADPH are needed in the pentose phospahte pathway.