Biology Quiz Lactate Fermentation 10/12/26

What is the enzyme that performs the "return on investment" substrate-level phosphorylation in the last step of glycolysis?

Pyruvate kinase (PK)

retained form of glucose within cells

glucose-6-phosphate

what is the name of the pair of triose-Ps that continue into glycolysis after aldolase cleavage

Glyceraldehyde-3-phosphate (GAP)

product of PFK1

fructose-1,6-biphosphate

Lactate goes to the liver to enter _____ to provide more glucose for working muscle.

gluconeogenesis

during the GAPDH reaction what is donated to NAD+ to reduce it

A hydride ion (H-)

During fermentation, pyruvate is reduced by the compound _____ so as to produce the required oxidized substrate for continuous GAPDH action.

NADH

What is the substrate that donates a phosphate to make the "profit" ATPs of glycolysis

1,3-Biphosphoglycerate (1,3-BPG)

What frees the thioester-bound intermediate from the active site of GAPDH

Inorganic phosphate (Pi)

enzyme that performs the redox reaction of glycolysis

Glyceraldehydfe-3-phosphate dehydrogenase (GAPDH)

enzyme that commits to glycolysis by investing the second ATP

PFK1 (Phosphofructokinase-1)

What enzyme invests the first ATP to retain glucose within cells

Hexokinase

during the GAPDH reaction what amino acid forms a thioester bond to the number one carbon of glyceraldehyde-3-P

Cysteine

What is the low energy product of 3-phosphoglycerate kinase that creates a very negative deltaG reaction

3-phosphoglycerate (3-PG)

What is the donating substrate that produces the "return on investment" ATPs produced at the end of glycolysis

Phosphoenolpyruvate (PEP)

What enzyme is responsible for the redox reaction that reduces pyruvate.

Lactate dehydrogenase (LDH)

What is the final product of glycolysis

Pyruvate

What enzyme performs the "profit" substrate-level phosphorylation to make ATP

3-phosphoglycerate kinase