which of the following statements about the thylakoid membrane are correct? it contains photosystem i and atp synthase in the unstacked regions. it contains the cytochrome bf complex in the unstacked regions only. it contains photosystem ii mostly in the stacked regions. it facilitates communication between photosystems i and ii by the circulation of plastoquinones and plastocyanins in the thylakoid membrane. it allows direct interaction between p680* and p700* reaction centers through its differentiation into stacked and unstacked regions.