Tuesday, November 29, 2011

Scribe Post for Tuesday, 11/29

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

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

Some Important Things in the Notes:
- 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**


  1. I don't see any problems! I really liked the pictures/videos you used because they helped enforce the material and they were easy to understand. :)

  2. Regina I liked this post a lot, but if I would add one thing is maybe define the terms like elongation is this..., but other than that it was really good and was a good layout of what we did in class.

  3. HEy Regina. I think you did great here, and your use of pictures was relly effective. But maybe you should have gone into the splicing of the RNA a little bit more, but other than that it was awesome.