In the inner mitchondrial membrane, hydrogen ions...
A)are pumped in olny one direction.
B)are pumped in both directions
C)leak across in only one direction
D)leak across in both directions
http://cellbio.utmb.edu/cellbio/mitochondria_1.htm
To determine the correct answer to the question, we can refer to the given source link. The link provides information about mitochondria and the inner mitochondrial membrane.
According to the source, the process of pumping hydrogen ions (protons) occurs in the inner mitochondrial membrane as part of the electron transport chain during cellular respiration. This process creates an electrochemical gradient across the membrane.
Based on this information, we can identify the correct answer to the question:
A) Hydrogen ions are pumped in only one direction.
Therefore, option A is the correct answer.