Indicate True (T) and False (F) Statements Below Regarding the Nucleus

Short Answer

Indicate true (T) and false (F) statements below regarding the nucleus and nuclear protein transport. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTF.
( ) The inner and outer nuclear membranes are continuous with each other, yet maintain distinct protein compositions.
( ) The outer nuclear membrane is studded with ribosomes engaged in protein synthesis.
( ) The endoplasmic reticulum lumen is continuous with the nuclear interior.
( ) Ribosomal proteins pass through the nuclear pore complexes twice; they are imported into the nucleus after synthesis, and are exported from the nucleus after assembly with ribosomal RNA.