Final answer:
The statement is true; both mitochondria and chloroplasts use multiple protein translocators for the import of proteins synthesized in the cytoplasm, involving specific signal peptides, receptor proteins, chaperone proteins, and various carrier proteins.
Step-by-step explanation:
The statement 'Multiple protein translocators are used for mitochondria & chloroplasts proteins' is true. Proteins destined for the mitochondria and chloroplasts are synthesized in the cytoplasm and contain specific oligopeptide signals that direct them to their respective organelles. Mitochondrial proteins, for instance, have an N-terminal signal peptide that allows them to bind to a receptor protein on the mitochondrial membrane, and they also require chaperone proteins like HSP70 for unfolding and refolding as they cross the membrane. Furthermore, carrier proteins, such as uniporter, symporter, and antiporter, facilitate the movement of substances across membranes, which is key for active transport involving energy (often from ATP) to move substances against their concentration gradient.