BIOA01H3 Lecture Notes - Lecture 3: Intron, Intermediate Filament, Phospholipid

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Bebhinn Treanor

Document Summary

Function of nucleus: safe storage site of hereditary materials and is the site where heredityary material is replicated (later in s phase). Also the site where rna synthesis occurs and where big. # of membranes in a proper nucleus: 2 close membranes that fit together. Double membrane bound: 2 phospholipid bilayers closely together. Membranes of nuclear envelope: outer and inner membrane. Inner membrane: inward facing-side which is associated with a protein meshwork called the nuclear lamina. Nuclear lamina: protein meshwork (associated with inner membrane of every nucleus) Purpose of intermediate filaments: gives strength to the nuclear envelope. Nuclear pore: carefully regulated set of opening that control the movement of large molecules in and out of the nucleus. Components of a single nuclear pore: 8 large protein granules arranged in an octagon. Relation/metaphors of nucleus: secured area: nuclear pores: area of fence with gates. Gates have security guards which only allow certain molecules that have id.