Class10

Class10 - Biomolecules Chem 83 will consider four types of...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 83 will consider four types of biomolecules derived from the micromolecules of HCN and H 2 CO Carbohydrates Lipids (fats) Proteins Nucleic Acids All were first produced abiotically (without life) and somehow later combined to form the cell, the basic unit of structure of every living thing. (Oparin) Biomolecules
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemical evolution Frequently a biological molecule is a large molecule made up of repeating units that are linked together. The simplest repeating unit is called a monomer and the large molecule is called a polymer. Micromolecules combined to form larger molecules that combined to form progressively larger molecules. Tro, NJ, Chemistry in Focus, Brooks/Cole, CA, 1998, 456.
Background image of page 2
Example: polymerization of the micromolecule, formaldehyde H 2 C=O +H 2 C=O HC=O H 2 COH +H 2 C=O HC=O HCOH H 2 COH Monomer Dimer Trimer Process repeats to form progressively larger molecules. It is represented by the general equation, n CH 2 O [CH 2 O] n . Called a carbon hydrate and shortened to carbohydrate. Edible carbohydrates are also called sugars.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Carbohydrates Hill/Kolb, "Chemistry for Changing Times", 7th,Prentice Hall, NJ, 19995,456 Carbohydrates are polar molecules capable of H-bonding (water soluble) that contain a carbonyl group (C=O) and several alcohol groups (OH). Names typically end in -ose. For n = 6, there are three common hexoses. Composition: #C-H ≈ #O-H
Background image of page 4
http://chemistry2.csudh.edu/rpendarvis/3feb23.gif Complexity increases when chains close to form rings The -OH on C-1 and C-4 in same orientation The -OH on C-1 and C-4 in opposite orientat- ions
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Complexity increases when rings form disaccharides http://www.ualr.edu/botany/sucrose.gif Two monosaccharides (one ring each) -H 2 O +H 2 O One disaccharide (two rings with an -O- bond between them) Formed by dehydration reaction - loss of water from 2 monosacharides
Background image of page 6
http://learners.in.th/file/dawood/StarchCelluloseStructure.jpg
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/19/2011 for the course CHEM 83 taught by Professor Bonk,j during the Fall '08 term at Duke.

Page1 / 23

Class10 - Biomolecules Chem 83 will consider four types of...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online