1. Bell Ringer
What is the it called when we make a copy of mRNA from DNA?
What is the RNA copied from the DNA chain ATTAAGCGAT?
Why do we need RNA?
What base is switched when using RNA?

2. What happens when the mRNA leaves the nucleus??
It travels through the cytoplasm until it attaches to a ribosome.
Transcription is when the mRNA was made from DNA in the nucleus.

3. Translation
Decoding of an mRNA message into a polypeptide chain (protein)
Where does it start: AUG (aka a start codon)

4. The Process of Translation
As each codon of mRNA moves through the ribosome the tRNA brings in a pairing amino acid.
Each tRNA carries only 1 kind of amino acid.

5. Proteins Our proteins are made up of AMINO ACIDS. DNA: TACGCACATTTA
mRNA: AUGCGUGUAAAU
Protein:
CODON: block of 3 mRNA bases

6. The mRNA Code
Start Codon:
AUG
Methionine
Stop Codon:
UGA,UAA, UAG

7. If asked to find an anti-codon...
Anti-Codon = block of 3 tRNA bases
Anti-Codon would pair with mRNA
AUGCGUGUA : mRNA
UACGCACAU: Anti-Codon

9. Knowledge Check How many different kinds of bases can be found on DNA?
What base is found on RNA but not DNA?
How many bases are in a codon? In an anti-codon?
How many amino acids are attached to a single transfer RNA?
Transcription occurs in the ______________; Translation occurs on the________________.
The process of making RNA from DNA is called _______________.
The process of assembling a protein from RNA is called ________________________.

10. Together Then Your Turn

12. Protein Synthesis in Autoville

13. Translation Reading Pg 303-306
During translation the cell uses information from _____________ to produce ____________.
Summarize A, B, C, & D from figure
Where does translation take place?
Where is RNA released to?
How does translation begin?
What are the unpaired bases in tRNA called?
How does the polypeptide chain know when to stop?
Compare DNA & RNA to a construction site.
What was Gregor Mendel surprised to learn?
12-3 Section Assessment Questions
Hand in when finished.

14. Closure What is translation? Where does translation occur?
What is created during translation?
What is a codon?
What is the job of tRNA?
Why can’t DNA leave the nucleus?
What attaches to the tRNA?

15. Bell Ringer Where does translation take place?
Draw a tRNA. What is the role of this? What two things are attached to the tRNA?