Presentation on theme: "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."— Presentation transcript:
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 Whats RNA???
RNA- 3 differences 1.The sugar is ribose, not deoxyribose 2.RNA single stranded 3.RNA base- uracil instead of thymine
Transcription DNA 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
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 3S
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!