BIOLOGY 1A03 Lecture Notes - Lecture 3: Ribbon Diagram, Globular Protein, Nucleolus

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

Protein: transport & signalling, embedded in cell membrane to move substances across membrane. Protein structure representation: space-filling diagram shows every atom (size & location), recognized by colour, ribbon diagram shows the backbone polymer (white line), reiterated structure called the alpha helix (broader yellow line) and a less ordered loop (thinner pink line) The code for a protein sequence is in the nucleus: the nucleus is a double membrane-bound domain that contains chromosomes that pack & control dna molecules, inside, there is the nucleolus where the ribosomal. Rna molecules are transcribed: the double membrane allows material to flow into/ out of nucleus, most ribosomal rnas are manufactured in the nucleolus, they are then exported to the cytoplasm. Transcribed rna exists the nucleus: nuclear pore complexes allow rna to leave nucleus for further processing, mrna (transcribed from dna) has all protein info & leaves through these pores.