BIOLOGY 1A03 Lecture Notes - Lecture 3: Ribbon Diagram, Nuclear Pore, Nuclear Membrane

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Alastair Tracey Rosa Da Silva

Document Summary

Proteins: what do they do, how are they made, what do they look like, proteins have various functions, transport and signalling, movement and structure, enzymes, defense, proteins have various structures, how are protein structures represented, space-filling diagram. In a eukaryotic cell, the primary rna transcript is processed to messenger or mrna and transported into the cytoplasm where it is then translated into the protein by the ribosomes. Rna molecules: all proteins are linear polymers of amino acids, condensation reactions polymerize amino acids, releasing water, monomer in and water out. Hydrolysis breaks the polymers apart by adding water molecules: water in and monomer out, translation occurs inside the ribosome. Condensation reactions that form amino acids, are catalysed within the ribosome. The elongated chain is extruded out f the large subunit of the ribosome. Transfer or trna matches the sequence on the mrna and carries the appropriate amino acid to the next position in the chain: variable side chains have distinct properties.