BIOA01H3 Chapter Notes - Chapter 3: Groupon, Thymine, Chitin

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Published on 17 Feb 2012
School
UTSC
Department
Biological Sciences
Course
BIOA01H3
Professor
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Document Summary

Bioa01 fall2010 chapter 3: macromolecules and the origin of life.  optical isomers: occur when a carbon atoms has 4 different atoms or groups of atoms attached to it (mirror images)  biochemical unity: organisms can obtain required macromolecules by eating other organisms.  condensation reaction/ dehydration reaction: water is removed, monomers are bonded.  hydrolysis reaction: water is added, polymer is broken apart forming monomers. 3. 2 proteins and enzymes (chapter 6) function: structural support, defense, catalysis, protection, transport, regulation and movement.  20 amino acids arranged in different sequences. Carboxyl group of one amino acid reacts with the amino group of another, forming a peptide bond which forms the backbone of all protein molecules. One of the shortest polypeptides is insulin. 2 isomeric forms: d-amino acids (right), l-amino acids (left) Specific shape and structure of a protein allows it to bind non covcalently to another molecule, called a ligand which in turn allows other important biological events to occur.

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