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I. The Structure of DNA
1. DNA = Deoxyribonucleic Acid2. Contains all information to make genetic
code
I. The Structure of DNA
3. DNA is composed of nucleotides4. Nucleotides are composed of 3 structures:
a) Deoxyribose:b) Phosphate grp:c) Nitrogen base:
I. The Structure of DNA
5. 4 types of Nitrogen bases:a) Adenine: Ab) Guanine: Gc) Cytosine: C d) Thymine: T
I. The Structure of DNA
6. Adenine & Guanine = _______________7. Cytosine & Thymine = _______________
II) The Double Helix
1. DNA is in shape of __________2. Double Helix: 2 nucleotide chains
__________________3. Nucleotides are connected using covalent
bonds a) Nitrogen bases are connected by hydrogen bonds
III) Complementary Base Pairing
1. Comp. Base Pairs: Nitrogen bases that pair together to connect the nucleotides of DNA
a) Adenine : ____________b) Guanine :
2. Base Pairing rules:
IV. Replication of DNA
2. Replication Stepsa) DNA unwinds and unzips –enzyme Helicase breaks
the _______ bondsb) Each chain will act as _________ (pattern) to copy
new nucleotidec) DNA unzips: nucleotide pieces bond to each
exposed half of DNA moleculed) Enzyme Polymerase bonds to monomers to create 2
identical strands
IV. Replication of DNA
*Nucleotide monomers come from digested food*Point where helicase is separating DNA-Replication
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