The answer is endoplasmic reticulum. There are two types of the organelle. The rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). The RER has ribosomes attached to its outer membrane hence mainly folds, modifies and transports proteins. SER, on the other hand, is significant in the modification and transportation of lipids.
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The cell membrane controls what moves in and out of the cell. Cell membranes only allow some solutes solids to move across it. Movement across the membrane depends on the size and type of the solute-Solid.
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I wanna say its the first answer but dont take my word for it.
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the last one sorry if i'm wrong
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