13.In order for NAD+ toremove electrons from glucose or other
organic molecules, which ofthe following must be true
a. the organic molecule or glucose must be negatively
chargedin order to reduce the positively charged NAD+.
b. Oxygen must be present to oxidize the NADH produced back
toNAD+
c. The free energy liberated when electrons are removed
fromthe organic molecules must be greater than the energy required
togive the electrons to NAD+.
d. A and B are both correct
e. A,B, and C are all correct.

61. A major function of the mitochondrial inner membrane is
theconversion of energy from electrons to the stored energy of
thephosphate bond in ATP. To accomplish this function, the
innermitochondrial membrane must have all of the following
except
a. carrier proteins to accept electrons from NADH
b. integral, transverse ATP synthase
c. proton pumps embedded in the membrane
d. the electron transport chain of proteins
e. high permeability to protons.
62. When hydrogen ions are pumped from the mitochondrialmatrix
across the inner membrane and into the intermembrane space,the
result is the
a. formation of ATP.
b. reduction of NAD+
c. restoration of the NA+/K+ balance across the membrane
d. creation of a proton gradient
e. lowering of pH in the mitochondrial matrix.