Podcast
Questions and Answers
Which molecule makes PFK activity more responsive to substrate?
Which molecule makes PFK activity more responsive to substrate?
- F-2,6-BP (correct)
- ATP
- AMP
- ADP
Which enzyme catalyzes an irreversible step in the glycolytic pathway with no meaningful back-reaction?
Which enzyme catalyzes an irreversible step in the glycolytic pathway with no meaningful back-reaction?
- FBPase
- Aldolase
- Enzyme f
- PFK (correct)
What effect does F-2,6-BP have on PFK activity in relation to ATP and FBPase?
What effect does F-2,6-BP have on PFK activity in relation to ATP and FBPase?
- Decreases the inhibitory effects of ATP and stimulates FBPase activity
- Decreases the inhibitory effects of ATP and opposes FBPase activity (correct)
- Increases the inhibitory effects of ATP and stimulates FBPase activity
- Opposes the inhibitory effects of ATP and stimulates FBPase activity
What role does substrate cycling play in the glycolytic pathway?
What role does substrate cycling play in the glycolytic pathway?
Which molecules act as 'brakes' in regulating enzyme activities within the glycolytic pathway?
Which molecules act as 'brakes' in regulating enzyme activities within the glycolytic pathway?
What type of regulation is described when enzymes within the glycolytic pathway are allosterically regulated by effectors like gas and brake pedals?
What type of regulation is described when enzymes within the glycolytic pathway are allosterically regulated by effectors like gas and brake pedals?
What is the role of F-2,6-BP in the regulation of PFK?
What is the role of F-2,6-BP in the regulation of PFK?
How does ATP affect PFK regulation?
How does ATP affect PFK regulation?
What is the main function of substrate cycling in glycolysis?
What is the main function of substrate cycling in glycolysis?
How is FBPase regulated in the glycolytic pathway?
How is FBPase regulated in the glycolytic pathway?
Which statement best describes enzyme allosteric regulation?
Which statement best describes enzyme allosteric regulation?
How does AMP affect enzyme activity in the glycolytic pathway?
How does AMP affect enzyme activity in the glycolytic pathway?
What is the major rate-determining step in glycolysis?
What is the major rate-determining step in glycolysis?
What inhibits phosphofructokinase (PFK) activity, indicating high energy levels in the cell?
What inhibits phosphofructokinase (PFK) activity, indicating high energy levels in the cell?
What is the regulatory molecule that stimulates phosphofructokinase (PFK) activity?
What is the regulatory molecule that stimulates phosphofructokinase (PFK) activity?
Which statement describes the allosteric regulation of PFK accurately?
Which statement describes the allosteric regulation of PFK accurately?
What is the role of fructose-2,6-bisphosphate in regulating phosphofructokinase (PFK)?
What is the role of fructose-2,6-bisphosphate in regulating phosphofructokinase (PFK)?
Which molecule has the highest potential to stimulate a significant increase in phosphofructokinase (PFK) activity?
Which molecule has the highest potential to stimulate a significant increase in phosphofructokinase (PFK) activity?
