試題詳解

4. Imagine protein X, destined to span the plasma membrane； assume the mRNA carrying the genetic message for protein X has been translated by ribosomes in a cell culture. If you fractionate the cells, in which fraction would you find protein X?
(A)pellet rich in nuclei and cellular debris
(B)pellet rich in "microsomes"
(C)pellet rich in mitochondria
(D)pellet rich in ribosomes
(E)pellet rich in microtubules