Question

suppose that a cells demand for atp suddenly exceeds its supply of atp from cellular respiration. which statement correctly describes how this increased demand would lead to an increased rate of atp production? atp levels would fall at first, increasing the inhibition of pfk and increasing the rate of atp production. atp levels would fall at first, decreasing the inhibition of pfk and increasing the rate of atp production. atp levels would rise at first, increasing the inhibition of pfk and increasing the rate of atp production. atp levels would rise at first, decreasing the inhibition of pfk and increasing the rate of atp production. part d (4 of 4) -

Explanation:

When a cell's demand for ATP exceeds its supply, ATP levels initially fall. Phosphofructokinase (PFK) is an enzyme that plays a key - role in glycolysis (a pathway for ATP production). High levels of ATP inhibit PFK. So, when ATP levels fall, the inhibition of PFK is decreased. This leads to an increase in the rate of glycolysis and thus an increase in ATP production.

Answer:

ATP levels would fall at first, decreasing the inhibition of PFK and increasing the rate of ATP production.