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20 Cards in this Set
- Front
- Back
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Atoms |
Smalesg fundamental unit of matter, 120 different kind of "elements" biology is made of 4 major chin 10 minor 30-50 trace elements |
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What does energy do |
It interacts interacts with atoms in different ways Holds e- to the nucleus When atoms absorb energy e-s are moved to higher energy levels Es back to lower levels release energy |
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Covalent bond |
Sharing or es |
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ionic bonds |
Transfer if es |
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polarity |
Unequal sharing of electrons in a covalent bond Polar molecules ate attached to other polar molecules |
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hydrogen bonds |
The strongest attractions between the most polar molecules |
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do bonds determine shape? |
Yes structure and function are always related |
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all chemical reactions |
Result in the breaking and forming of bonds |
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radioactivity |
Atoms with unstable nuclei |
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waters unique properties |
Very polar, contains hydrogen bonds, attracted to itself |
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coehision |
Sticking together |
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adhesion |
Sticking to other things (water is both) |
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why carbon |
Abundant Versatile Tetravalent 4 bonds to get stable (infinent variety) |
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vitalism |
Belief in a life force |
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mechanism |
Theory that there's nothing special about how life is built |
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isomers |
Molecule with different structure but same formula |
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3 kinds of isomers |
Structural - same formula different order Cis-trans- same formula, different positioning around a double bond Enantiomers- same formula, mirrkod image positioning around a central carbon |
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what do all cells use |
D-sugars , l - amino acids |
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Two forms of macromolecule |
Monomer- the simplest unit Polymer- a large molecule made of repeating monomers |
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carbohydrates |
Sugars a d starches |
