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DNA
parts of DNA
8
Biology
9th Grade
12/12/2011
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Term
What does DNA stand for?
 Definition
deoxyribonucleic acid
Term
Who discovered that chromosomes are made up of DNA (double helix)?
 Definition
Watson and Crick
Term
Double Helix
 Definition
twisted ladder of nucleotide bases
Term
apple and trees
 Definition
adenine and thymine
Term
cars and garages
 Definition
cytosine and guanine
Term
Replication
 Definition
to make a copy
Term
What part of the cycle does replication occur?
 Definition
In the "S" (synthesis) phase
Term
Steps of Replication
 Definition
1. Enzymes unwind helix
2. Enzymes pull apart DNA molecule
3. Exposed bases attract complementary bases
4. Polymerase joins all the nucleotides together on each new strand
5. Mitosis begins in the cell
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