Chapter 12, Problem 3P

Summary Introduction

To examine: Whether the statement “To avoid the inevitable collisions that would occur if two-way traffic through a single pore were allowed, nuclear pore complexes are specialized so that some mediate import while others mediate export” is true or false.

Concept introduction: The nucleus is the site of replication, transcription, DNA repair and recombination. The nuclear membrane has nuclear pores surrounded by nucleoporins or nuclear pore complexes which facilitate the flow of RNA, proteins, ions and other molecules between cytoplasm and nucleoplasm.