EXAM 2 Flashcards
When ADP gains a phosphate to form ATP
Energy is consumed
The exergonic reaction 1,3-diphosphoglycerate → 3-phosphoglycerate is coupled to the reaction ADP + Pi → ATP. Which of the following is most likely to be true about the reaction ADP + Pi → ATP?
The reaction is endergonic
Which of the following statements about metabolic pathways is true?
Each one is regulated by specific enzymes
Oxidation and reduction
Always occur together
The function of NAD+ is to
carry hydrogen atoms and free energy from compounds being oxidized, and to give hydrogen atoms and free energy to compounds being reduced.
When NADH donates two electrons to ubiquinone during respiration, ubiquinone is
Reduced
The proton motive force is
the proton concentration gradient and electric charge difference.
The role of oxygen gas in our cells is to
accept electrons from the respiratory chain
In all cells, glucose metabolism begins with
Glycolysis
Pyruvate oxidation generates
Acetate, NADH + H+ from NAD+, a change in free energy, CO2
The citric acid cycle begins with
Acetyl CoA
In the citric acid cycle, oxidative steps are coupled to
the reduction of electron carriers
The electron transport chain contains four large protein complexes. These proteins
are embedded in the inner membrane of the mitochondrion
When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane into the intermembranous space, the result is the
creation of a proton gradient
The chemiosmotic generation of ATP is driven by
the proton motive force