q card quiz what is……….. 1.the basic function of dna 2.the basic structure of dna 3.name the...
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Q Card Quiz
• What is………..
1. The basic function of DNA
2. The basic structure of DNA
3. Name the four nitrogenous bases
4. Match the bases correctly
The basic function of DNA
--- Carries hereditary information
The basic structure of DNA
-- A double helix made up of nucleotides
Name the four nitrogenous bases
--- adenine, guanine, cytosine, thymine
Match the bases correctly
-- A-T
--- C-G
Transcription- a working copy of DNA
• Only copy one strand.
• Working copy of DNA leaves nucleus.
• Read the “instructions” that are coded in the sequence of base pairs
• Create proteins, which will create you!
• Working copy of DNA is mRNA
• What’s RNA???
RNA- 3 differences1. The sugar is
ribose, not deoxyribose
2. RNA single stranded
3. RNA base- uracil instead of thymine
TranscriptionDNA is copied into mRNA
• RNA polymerase splits DNA
• Complimentary base pairing creates single strand of mRNA
• Copies a select piece of DNA-gene
• mRNA leaves the nucleus
• mRNA Animation
• DNA G C T A C C T G C A T A• mRNA?• C G A U G G A C G U A U
• mRNA carries information in codons –a group of 3 nucleotides is the code for one amino acid
• Review- proteins are made up of amino acids.
Practice
• DNA Sequence
CTGGGTAGCCTACAGTAG
mRNA: GACCCAUCGG
Codons- GROUP THE BASES IN 3’S
Codons
• GAC-CCA-UCG-GAU-GUC-AUC
• 1 codon = amino acid.
• 64 different combinations and only 20 amino acids
• Groups of 3 bases on mRNA code for an amino acid.
• A string of amino acids makes a protein, SPECIFICALLY ENZYMES
• ENZYMES make you!
Magic decoder ring
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