Phosphofructokinase Is an Enzyme That Catalyzes the Conversion of Fructose

question 45

Multiple Choice

Phosphofructokinase is an enzyme that catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate,an early step of glycolysis.In the presence of oxygen,an increase in the amount of ATP in a cell would be expected to

• A)inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle.
• B)activate the enzyme and thus slow the rates of glycolysis and the citric acid cycle.
• C)inhibit the enzyme and thus increase the rates of glycolysis and the citric acid cycle.
• D)activate the enzyme and increase the rates of glycolysis and the citric acid cycle.
• E)inhibit the enzyme and thus increase the rate of glycolysis and the concentration of citrate.

---

Definitions:

Pacemaker

A pacemaker is a medical device implanted in the chest to help control abnormal heart rhythms by using electrical pulses to prompt the heart to beat at a normal rate.

Hypothalamic Nucleus

A cluster of neurons in the hypothalamus involved in regulating various bodily functions, including temperature, hunger, and hormonal secretion.

EEG Pattern

The characteristic electrical activity of the brain recorded with electrodes placed on the scalp, used in the diagnosis of neurological conditions.

Hz

Hertz, the unit of frequency in the International System of Units (SI), representing one cycle per second.