Plot below shows the velocity of the reaction catalyzed by phosphofructokinase-1 as a function of the concentration of fructose 6-phosphate. Which statement is correct? Low (ATP) Reaction velocity- High (ATP) [Fructose 6-phosphatel- ATP is both a substrate and an allosteric inhibitor of PFK ATP is both a substrate and an allosteric activator of PFK. Fructose 6-phosphate binding to PFK is less cooperative at high [ATP] PFK-1 has a higher affinity for fructose 6-phosphate at high (ATP).

Biochemistry
6th Edition
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Reginald H. Garrett, Charles M. Grisham
Chapter27: Metabolic Integration And Organ Specialization
Section: Chapter Questions
Problem 20P: Figure 27.3 illustrates the response of R (ATP-regenerating) and U (ATP-utilizing) enzymes to energy...
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Plot below shows the velocity of the reaction catalyzed by phosphofructokinase-1 as a function of the
concentration of fructose 6-phosphate. Which statement is correct?
Low (ATP)
Reaction velocity-
000
High [ATP]
[Fructose 6-phosphate] →
ATP is both a substrate and an allosteric inhibitor of PFK
ATP is both a substrate and an allosteric activator of PFK.
Fructose 6-phosphate binding to PFK is less cooperative at high [ATP]
PFK-1 has a higher affinity for fructose 6-phosphate at high [ATP].
Transcribed Image Text:Plot below shows the velocity of the reaction catalyzed by phosphofructokinase-1 as a function of the concentration of fructose 6-phosphate. Which statement is correct? Low (ATP) Reaction velocity- 000 High [ATP] [Fructose 6-phosphate] → ATP is both a substrate and an allosteric inhibitor of PFK ATP is both a substrate and an allosteric activator of PFK. Fructose 6-phosphate binding to PFK is less cooperative at high [ATP] PFK-1 has a higher affinity for fructose 6-phosphate at high [ATP].
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