[Campbell Biology P.172] According to the provided figure and text, which of the following s... | Practice Question

According to the provided figure and text, which of the following statements about the nuclear pore complex or ribosomes is correct?

  • A: Eukaryotic ribosomes are composed of a single large subunit and fewer than 80 proteins.
  • B: Ribosomal subunits are primarily synthesized in the cytoplasm and then imported into the nucleus for assembly.
  • C: The nuclear pore complex is responsible for regulating the movement of molecules, including ribosomal subunits, between the nucleus and cytoplasm.
  • D: All RNA molecules are immediately translated into proteins upon synthesis within the nucleus.

Explanation

Text e clearly states that the nuclear pore complex regulates molecular traffic, and ribosomal subunits pass through it. Text f specifies that eukaryotic ribosomes have large and small subunits and more than 80 proteins, contradicting option A. Options B and D contain factual errors regarding the location of ribosomal subunit assembly and the translation of all RNA types.