Bio 102 lec
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What element do all important molecules contain?
Fundamental form of matter
Contains protons (+) Neutrons (uncharged) and electrons (-)
2 or more atoms held together by a chemical bond
Types of Chemical Bonds
- Covalent - strong bond
- Ionic - weak bond
Hydrogen - weak bond
Charges for molecules
Nonpolar - No charge
Polar - Partial charges (+ or -)
Charged - cation (+) or anion (-)
Properties of water
- Readily forms hydrogen bonds
- Excellent solvent. Dissolves both charged and polar molecules
does not like water. example: oil
likes water or molecules will dissolve in water ( salt)
Importance of Carbon
- Readily forms a variety of covalent ( strong ) bonds.
- Attaches to a variety of side groups
forms framework of all organic molecules
basis for biological macromolecules
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