Most proteins destined to enter the endoplasmic reticulum _________.

Most proteins destined to enter the endoplasmic reticulum _________.



(a) are transported across the membrane after their synthesis is complete.
(b) are synthesized on free ribosomes in the cytosol.
(c) begin to cross the membrane while still being synthesized.
(d) remain within the endoplasmic reticulum.



Answer: 




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