102 handout 96 - MCB 102 Handout 9/6 CHAPTER 1 FOUNDATIONS...

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MCB 102 Handout 9/6 CHAPTER 1: FOUNDATIONS OF BIOCHEMISTRY Three domains of life: Eukaryotes -nuclear envelope, includes animals, plants and fungi Eubacteria -no nuclear envelope, includes bacteria such as E. coli Archaebacteria -no nuclear envelope, includes bacteria that live in extreme environments Functional group -an atom or group of atoms that confers specific chemical properties on the molecule of which it is a part Configuration -the fixed 3D spatial arrangement of atoms in a molecule that has double bonds (which cannot rotate freely) or a chiral center Chiral center -an atom whose bonds to other atoms/functional groups are arranged in a specific sequence (eg. a carbon bound to four different groups). A chiral molecule contains a chiral center. Stereoisomers -molecules with the same atoms and chemical bonds but different configurations Enantiomers -stereoisomers that are non-superimposable and are mirror images of each other Diastereomers -stereoisomers that are NOT mirror images of each other
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