Transcript Thursday, October 23

DAILY QUESTION
October 23, 2008
1. Proteins are made of
many different molecules
that are called _______
______.
Agenda
10/23/08
• Daily Question
• Ch 5 Section 4 Notes
Assignments:
1. Ch 5 Sect 4 Review Worksheet
due 10/24
2. Studyguide
Alcohols
• Organic compounds that are made of
oxygen as well as carbon and hydrogen
• Have hydroxyl or –OH groups
– Methanol, CH3OH
– Ethanol, CH3CH2OH
– Isopropanol, C3H8O or (CH3)2CHOH
• Names end in -ol
Alcohols
• Behave similar to water
– Structure is like a water molecule, but one
hydrogen atom is replaced by a methyl, or
CH3 group
– Attracted to neighboring molecules
– At room temperature they are liquids
Polymers
• Small organic molecules bond to form long
chains called polymers
Polyethene
• Poly means many
• Ethene is an alkene, C2H4
• Means “many ethenes”
Polymers
• Natural:
–
–
–
–
–
–
–
Rubber
Wood
Cotton
Wool
Starch
Protein
DNA
• Man-made:
– Plastics
– Fibers
Properties of Polymers
• Determined by its structure
– Elasticity
Biochemical Compounds
• Naturally occurring organic compounds
– Carbohydrates
– Proteins
– DNA
Carbohydrates
• Any organic compound that is made of
carbon, hydrogen, and oxygen and that
provides nutrients to the cells of living
things
– Glucose
– Starch
Proteins
• An organic compound that is made of one
or more chains of amino acids and that is
a principal component of all cells
– Amino acids are made of carbon, hydrogen,
oxygen, and nitrogen
• 20 naturally occurring amino acids
• They way they bind determines the protein made
DNA
• Made of organic molecules containing
carbon, hydrogen, oxygen, nitrogen, and
phosphorus
• In the form of paired chains, or strands in
a twisted ladder, or double helix