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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-

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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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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