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AP Bio. 10/04/04. Itinerary 10/05/04. Due Today: Writing an Essay for the AP Exam Topics for today Review DNA Replication Overview Messelson-Stahl Experiments In Detail Worksheet- This worksheet is due next Tuesday, 10/12. Itinerary 10/06/04. DNA Transcription DNA Translation
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AP Bio 10/04/04
Itinerary 10/05/04 • Due Today: Writing an Essay for the AP Exam • Topics for today • Review • DNA Replication • Overview • Messelson-Stahl Experiments • In Detail • Worksheet- This worksheet is due next Tuesday, 10/12
Itinerary 10/06/04 • DNA Transcription • DNA Translation • Discussion of next week’s laboratory
Review • Name the four classes of biomolecules
Review • Name the four classes of biomolecules • Define ‘monomer’ and ‘polymer.’
Review • Name the four classes of biomolecules • Define ‘monomer’ and ‘polymer.’ • What is a nucleotide?
Review • Name the four classes of biomolecules • Define ‘monomer’ and ‘polymer.’ • What is a nucleotide? • What are the three components of a nucleotide?
Structure of DNA/RNA (1) • Three Components • Phosphate Group • ‘Pentose Sugar’ • Nitrogenous base
Review • Name the four classes of biomolecules • Define ‘monomer’ and ‘polymer.’ • What is a nucleotide? • What are the three components of a nucleotide? • What is the difference between the purines and the • pyrimidines?
Structure of DNA/RNA (8) You need to remember these!
Review • Name the four classes of biomolecules • Define ‘monomer’ and ‘polymer.’ • What is a nucleotide? • What are the three components of a nucleotide? • What is the difference between the purines and the • pyrimidines? • 6. What is the name of this sugar?
Structure of DNA/RNA (3) Deoxyribose and Ribose are both 5 carbon sugars
Review • Name the four classes of biomolecules • Define ‘monomer’ and ‘polymer.’ • What is a nucleotide? • What are the three components of a nucleotide? • What is the difference between the purines and the • pyrimidines? • 6. What is the name of this sugar? • 7. Base Pairing
Gary Coleman Guanine-Cytosine
Gary Coleman Guanine-Cytosine
Gary Coleman Alex Trebek Guanine-Cytosine Adenine-Thymine
DNA Replication- Overview (1) • In Text- Pp 287- 297
DNA Replication- Overview (1) • In Text- Pp 287- 297 • Step 1: The Double Helix is unzipped
DNA Replication- Overview (1) • In Text- Pp 287- 297 • Step 1: The Double Helix is unzipped • Step 2: Each strand directs the synthesis of two new strands
DNA Replication- Overview (1) • In Text- Pp 287- 297 • Step 1: The Double Helix is unzipped • Step 2: Each strand directs the synthesis of two new strands • Step 3: The individual nucleotides are connected to form two new strands
Semiconservative Replication (1) Process of DNA replicationis called ‘semiconservative replication
Semiconservative Replication (2) Process of DNA replicationis called ‘semiconservative replication Make sure you know this term. You’ll see it again!
Semiconservative Replication (3) Process of DNA replicationis called ‘semiconservative replication This means that in each new double helix of DNA, one strand was from the parent.
Semiconservative Replication (7) How do we know that DNA replicates with a ‘Semiconservative’ nature?
Semiconservative Replication (7) How do we know that DNA replicates with a ‘Semiconservative’ nature? Any ideas?
Semiconservative Replication (7) How do we know that DNA replicates with a ‘Semiconservative’ nature? Any ideas? Meselson-Stahl experiment tested the three hypotheses for DNA replication
Semiconservative Replication (8)Meselson-Stahl Experiment Where is the 15N found?
Let’s use the flashlight on DNA Replication • Remember, DNA replication is the process of making copies of DNA.
Let’s use the flashlight on DNA Replication • Remember, DNA replication is the process of making copies of DNA. • When would the cell do this?
Let’s use the flashlight on DNA Replication • Remember, DNA replication is the process of making copies of DNA. • When would the cell do this? • Now we need to look at the specifics of DNA replication, and the enzymes involved in each step
But First, What’s an Enzyme? • A type of Protein
But First, What’s an Enzyme? • A type of Protein • Text Definition: • A class of proteins serving as catalysts, chemical agents that change the rate of a reaction without being consumed within the reaction