5. What is the function of the nuclear pore complex found in eukaryotes? (A) It regulates the movement of proteins into and out of the nucleus (B) It synthesizes the proteins required to copy DNA and make mRNA (C) It selectively transports molecules out of the nucleus, but prevents all inbound molecules from entering the nucleus (D) It assembles ribosomes from raw materials that are synthesized in the nucleus (E) It regulates the movement of RNAs out of the nucleus

複選題10. Cell membranes are asymmetrical. Which of the following statements are the most likely explanations for the membrane's asymmetrical nature? (A) Since the cell membrane forms a border between one cell and another in tightly packed tissues such as epithelium, the membrane must be asymmetrical. (B) Since cell membranes communicate signals from one organism to another, the cell membranes must be asymmetrical. (C) The two sides of a cell membrane face different environments and carry out different functions. (D) Proteins only function on the cytoplasmic side of the cell membrane, which results in the membrane's asymmetrical nature. (E) The two sides of membrane are structurally different. Different phospholipids are found in each side of the membrane.

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