SECTION 12.2 AND 12.3 DNA DNA IS DYNAMITE! Chapter 12 Nucleic Acids and Protein Synthesis.
Transcript of SECTION 12.2 AND 12.3 DNA DNA IS DYNAMITE! Chapter 12 Nucleic Acids and Protein Synthesis.
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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