BIOG1101 Lect 4- Macromolecules - Lect. 4-Macromolecules 1....

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lect. 4-Macromolecules 1. Energy Molecules 13:01 Daniel Green I. Where we’re going Water and carbon Polymerization Carbohydrates Lipids 1.Chemical Composition of Matter o Oxygen 45.6% (earth’s crust) 65% human o Carbon –(ec) 18.5% human o Hydrogen .14% (ec) 9.5% human Escaped into atmosphere Present in large quantities via H20 2. Water is HOH (H20) o Oxygen is more electronegative than H Shared e- are pulled toward O Polar Covalent bonds but w/  atoms that differ in electronegativitiy Hydrogen bonds: weak bonds, strong cohesive effects o Water is a solvent Anything slightly polar can be dissolved in H2O o Water is less dense as a solid Ice floats at top- solid phase less dense than liquid HOH 109 deg bond angle increases when solid is formed- more  space, same mess= less dense
Background image of page 1

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

View Full DocumentRight Arrow Icon
3. Carbon o Can be asymmetrical (chiral) Tetravalence allows poss. Of asymmetrical Handedness if four diff. 
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/01/2008 for the course BIO G 1101 taught by Professor Gilbert during the Fall '07 term at Cornell University (Engineering School).

Page1 / 6

BIOG1101 Lect 4- Macromolecules - Lect. 4-Macromolecules 1....

This preview shows document pages 1 - 3. Sign up to view the full document.

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