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1. Phosphofructokinase (PFK) is an important enzyme which is thought to control the rate of glycolysis. The graph in Figure 1 shows PFK activity at increasing substrate concentration at two levels of ATP. 100% low ATP PFK activity high ATP 0% substrate concentration Figure 1. [Source: A-Level Biology (Topical) Worked Solutions 2005 Ed. Topic 7 pg.4 question3] (i) With reference to Figure 1, describe the effect of high levels of ATP on PKF activity. [3] (ii) Explain how the rate of glycolysis may be regulated by this enzyme [5] 4-

1. Phosphofructokinase (PFK) is an important enzyme which is thought to control the rate of glycolysis. The graph in Figure 1 shows PFK activity at increasing substrate concentration at two levels of ATP. 100% low ATP PFK activity high ATP 0% substrate concentration Figure 1. [Source: A-Level Biology (Topical) Worked Solutions 2005 Ed. Topic 7 pg.4 question3] (i) With reference to Figure 1, describe the effect of high levels of ATP on PKF activity. [3] (ii) Explain how the rate of glycolysis may be regulated by this enzyme [5] 4-

Biology 2e
Biology 2e
2nd Edition
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter7: Cellular Respiration
Section: Chapter Questions
Problem 2VCQ: Figure 7.12 Cyanide inhibits cytochrome c oxidase, a component of the electron transport chain. If...
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1. Phosphofructokinase (PFK) is an important enzyme which is thought to control the rate of glycolysis. The graph in Figure 1 shows PFK activity at increasing substrate concentration at two levels of ATP. 100% low ATP PFK activity high ATP 0% substrate concentration Figure 1. [Source: A-Level Biology (Topical) Worked Solutions 2005 Ed. Topic 7 pg.4 question3] (i) With reference to Figure 1, describe the effect of high levels of ATP on PKF activity. [3] (ii) Explain how the rate of glycolysis may be regulated by this enzyme [5] 4-
Transcribed Image Text:1. Phosphofructokinase (PFK) is an important enzyme which is thought to control the rate of glycolysis. The graph in Figure 1 shows PFK activity at increasing substrate concentration at two levels of ATP. 100% low ATP PFK activity high ATP 0% substrate concentration Figure 1. [Source: A-Level Biology (Topical) Worked Solutions 2005 Ed. Topic 7 pg.4 question3] (i) With reference to Figure 1, describe the effect of high levels of ATP on PKF activity. [3] (ii) Explain how the rate of glycolysis may be regulated by this enzyme [5] 4-
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