Which Statement Regarding Regulation of Glycolysis and Gluconeogenesis Is FALSE

question 45

Multiple Choice

Which statement regarding regulation of glycolysis and gluconeogenesis is FALSE?

• A) Phosphofructokinase-1 and fructose 1,6-bisphosphatase are prevented from forming a futile cycle by reversible covalent modification.
• B) Hexokinase IV and glucose 6-phosphatase are transcriptionally regulated in hepatocytes.
• C) Phosphofructokinase-1 and fructose 1,6-bisphosphatase are reciprocally regulated by the allosteric regulator, fructose 2,6-bisphosphate.
• D) Binding of fructose 2,6-bisphosphate to phosphofructokinase-1 reduces the affinity of this enzyme for citrate.
• E) The cellular concentration of fructose 2,6-bisphosphate is determined by a bifunctional enzyme that is hormonally regulated.

---

Definitions:

Diaphragm

A dome-shaped muscular partition separating the thoracic cavity from the abdominal cavity, playing a crucial role in the breathing process.

Phrenic Nerves

Nerves that originate in the neck and pass down between the lung and heart to reach the diaphragm, crucial for breathing.

Levator Scapulae

A muscle in the back and neck that elevates the scapula (shoulder blade).

Retract

To draw back or in, often referring to the withdrawal of a statement or pulling a part of the body away from an anterior position.