Suppose you recreate Jagendorf and Uribe's chloroplast experiment with one small change: after
placing the chloroplasts (in the dark) in an acidic medium to fill the thylakoid membrane with protons,
you move the chloroplasts to a stronger acid rather than the basic solution used in the original
experiment. What would be the outcome of your experiment?
a. ATP synthesis would still occur because a proton gradient was created.
b. ATP synthesis would occur but at a slower rate because of the strength of the acid.
c. ATP synthesis would not occur because the protons would reach equilibrium on both sides
of the thylakoid membrane and, thus, be unable to drive the activity of ATP synthase.
d. ATP synthesis would not occur because the acid is too strong and would rupture the
thylakoid membrane.
e. ATP synthesis would occur, but only until the protons reached equilibrium.
C
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