BIOC 2300 Lecture 2: Lecture 2

• School: Dalhousie University
• Department: Biochem & Molecular Biology
• Course: BIOC 2300
• Professor: David Byers

Document Summary

Recall: biochemistry is the structure, function, and metabolism of the biomolecules (4 major classes). Nucleotides are polymers of nucleic acids, lipids are hydrophobic molecules, and carbohydrates polymer of monosaccharides. All of these biological molecules have in common, are centered around carbon. We are largely composed of the small, light weight elements, which form the strongest covalent bonds. The molecules formed by these elements are generally stable. The different groups in the pt have valence electrons that predict their bonding properties. The other common things are the cations that form counterions in the body quite often. We have potassium and magnesium inside the cell, etc. The hydrophobic fat is able to create the concentration gradients of the ions. Lewis dot symbols for representative elements: atoms participate in either covalent bonds (sharing of electrons) or ionic bonds (transfer of electrons) to complete their valence shell (either 2 or 8).