BMB 240 Lecture Notes - Lecture 2: Hydroxy Group, Aldehyde, Chemical Bond

• School: University of Maine
• Department: Micro and Molecular Biology
• Course: BMB 240
• Professor: Catherine Hopper

Document Summary

Lecture 2 chemistry of biological molecules (review: chemistry terminology, electrons: arranged in clouds or shell. First shell 2, second shell, third shell 8 max: atoms: smallest unit into which matter can be divided without the release of electrically charged particles. b. i. Polar: interact with water, meaning they are hydrophilic: non-polar: form covalent bonds, very strong, share electrons, hydrophobic: don"t interact with water, hydrophilic: interact with water, structure of atoms, electrons are arranged in shells, electrons govern bonding a. Ionic: one electron is completely transferred: covalent: electrons are shared, polar bond: occurs when a covalent bond that isn"t good at sharing. Creates a negative charge: hydrogen bond: a weak chemical bond between an electronegative atom and a hydrogen atom to another electronegative atom. Responsible for the properties of water: carbon: can form rings, functional groups a. i. They are involved in metabolic reactions, building block of disaccharides and polysaccharides. a. iii. Composed of two glucoses; an important breakdown product of starch. a. iv.