Final answer:
The statement describes membrane proteins, which are synthesized on ribosomes bound to the RER and modified in the Golgi apparatus before being embedded in the plasma membrane with specific domains facing the cytoplasm.
Step-by-step explanation:
The statement 'It will be embedded in the Golgi membrane with domain Y facing the cytoplasm' is most accurately describing C) membrane proteins. Proteins synthesized on bound ribosomes include ones that will be secreted, ones that will integrate into the plasma membrane, and ones that will reside within organelles. These membrane proteins are initially synthesized into the rough endoplasmic reticulum (RER), then passed to the Golgi apparatus where they undergo further modification such as glycosylation. They are finally embedded into the plasma membrane with specific orientations, which can result in certain domains facing the cytoplasm.
Secreted proteins, in contrast, are packaged into secretory vesicles which eventually fuse with the plasma membrane to release their content outside the cell. Cytoplasmic proteins typically remain in the cytosol and are not embedded in membranes. Thus, out of the options provided, the statement is specifically true for integral or membrane proteins as part of their function and structure within the cell membrane.