Unit 1 Cell Structure General info about the structure of cells 1.5 / 5 based on 2 ratings ? BiologyCellular processes and structureAS Created by: Katie SmithCreated on: 29-03-12 19:13 Nucleus In the Nucleus: Nuclear envelope double membrane surrounding nucleus outer membrane is continuous with rough ER often has ribosomes on surface controls entry and exit of materials in & out of nucleus contains reactions taking place within Nuclear pores allow passage of large molecules e.g. messenger RNA usually around 3000 pores in a nucleus - 40-100nm wide Nucleoplasm granular, jelly-like material Chromatin DNA found within nucleoplasm chromosomes take this form when not dividing Nucleolus manufactures RNA and assembles ribosomes 1 of 1
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