Download How does DNA copy itself?

4/24/2017
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How does DNA copy itself?
• Replication: when DNA is copied
• Only known molecule to be able to duplicate
itself
• Basic: unzips itself, find complementary base
pairs
What does this have
to do with science?
• DNA: big deal, it looks cool
But why do I have blue eyes?
Type AB blood?
A widow’s peak?
<insert trait here>?
• What’s the code for DNA?
DNA > RNA > amino acids > Proteins
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4/24/2017
• Transcription: a section of the DNA is copied
into RNA
– Think of DNA as the entire cookbook, and RNA like
a recipe out of that book
• Translation: putting together amino acids in
the right order to make proteins
– This is done on ribosomes
– Think using the recipe to make tacos
• 3 Bases code for one amino acid
Let’s watch
Base Pair to traits:
• Ribosome
– Organelle where protein synthesis takes place
– “protein factory”
• DNA  traits
– DNA codes for amino acids
– Several amino acids make a protein
– Proteins trigger chemical reactions
• 3 base pairs code for an amino acid
• There are 64 possible combinations
• There are 22 amino acids
DNA Tacos
3 base pairs (codon)
Amino acid
Amino acids make proteins
Proteins are messengers for cells to do
certain things
What is he talking about?
DNA
Cookbook
RNA
Recipe
Amino Acids
Beef, cheese, lettuce,
tomatoes, tortillas
Proteins
Taco
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4/24/2017
What is the kitchen?
Endoplasmic Reticulum
What is the chef?
Ribosomes
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