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