Scribe Post for Tuesday, 11/29

Today in Class:
-Finished DNA Notes (Page 10 – 19)

Homework:
-UP p. 99-110 (including UP p. 108A-B) due Thursday
-EC- Lab #37 due Thursday

Some Important Things in the Notes:

•RNA v. DNA
- RNA has
1. Ribose Sugar
2. 1 Strand
3. Uracil instead of Thymine
4. Smaller size than DNA- can go inside/outside nucleus
5. 3 types: mRNA, tRNA, rRNA

•Transcription- A molecule of DNA is copied into a complementary strand of mRNA

Steps of Transcription:

1 .)    Initiation

2 .)    RNA Elongation

3 .)    Termination

A little animated video of Transcription: http://www.youtube.com/watch?v=aiPHi1d_t5w&feature=related

•Processing RNA

-       - In Eukaryotes, to process RNA need extra nucleotides or cap and tail to protect the RNA and help the ribosomes recognize it as mRNA

-     -   Introns-noncoding regions (Removed before the RNA leaves the nucleus)

-    -  Exons-coding regions

•Translation-Translating the mRNA code into tRNA with the corresponding AA’s; Takes place in ribosome

Steps of Translation:

1 .)    Initiation

2 .)    Elongation

3 .)    Termination

Another animated video on Translation: http://www.youtube.com/watch?v=5bLEDd-PSTQ&feature=related

Codons-consist of three bases; used in the translating of mRNA

Above is a chart for all the triplet codons

61 codons for Amino acids
AUG=met and start
3 are stop codons (No amino acids)

 And I think that’s all!

Don't forget the test is on Monday!

NEXT SCRIBE: **Olivia**