The rate of glucose breakdown slows when cells are provided an
oxygen-rich environment, which suggests a level of metabolic
control. Select all answers which correctly
describe how oxygen could (and does) contribute to the activity
rate of glycolysis.
Increased oxygen raises the speed at which the citric acid
cycle runs by acting as a substrate for pyruvate dehydrogenase in
the pyruvate bridge reaction, increasing acetyl-CoA levels.
An increase in oxygen will raise the rate of electron transport
by providing additional electron acceptors, which will increase ATP
production.
Increased ATP levels feedback to allosterically inhibit the
activity of the enzyme regulating glycolysis called
phosphofructokinase.
Increased oxygen levels slow down breathing rate, decreasing
the amount of glucose delivered to each cell.