Which of the Following Statements About Transport into Mitochondria and Chloroplasts

Which of the following statements about transport into mitochondria and chloroplasts is FALSE?

A) The signal sequence on proteins destined for these organelles is recognized by a receptor protein in the outer membrane of these organelles.
B) After a protein moves through the protein translocator in the outer membrane of these organelles, the protein diffuses in the lumen until it encounters a protein translocator in the inner membrane.
C) Proteins that are transported into these organelles are unfolded as they are being transported.
D) Signal peptidase will remove the signal sequence once the protein has been imported into these organelles.