Multiple Choice
Which of the following statement(s) correctly describes the Cori cycle?
22. Carbohydrate Metabolism
Gluconeogenesis
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Fructose-1,6-bisphosphate is dephosphorylated by ________________ to fructose-6-phosphate.
A
Glucose-6-phophatase
B
Fructose-1,6-bisphosphatase
C
Phosphofructokinase
D
Fructose-6-phosphotase
Verified step by step guidance1
Identify the reaction taking place: Fructose-1,6-bisphosphate is being converted to fructose-6-phosphate by removing a phosphate group.
Understand the role of enzymes: Enzymes that remove phosphate groups are typically phosphatases.
Recognize the specific enzyme: The enzyme that specifically removes a phosphate group from fructose-1,6-bisphosphate is known as fructose-1,6-bisphosphatase.
Differentiate between similar enzymes: Phosphofructokinase is involved in adding a phosphate group, not removing it, and glucose-6-phosphatase acts on glucose-6-phosphate, not fructose-1,6-bisphosphate.
Conclude with the correct enzyme: Therefore, the enzyme responsible for dephosphorylating fructose-1,6-bisphosphate to fructose-6-phosphate is fructose-1,6-bisphosphatase.
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