Scribe Post 11/30/11

Today In Class....

1. DNA-mRNA-tRNA worksheet
2. Picked up a Content Quiz
3. Answered questions
4. Watched a few videos on transcription and translation
5. Did the in class activity: DNA models

HOMEWORK:

• 99-110 in UP
• Extra Credit: Lab 37 (should you choose to do it!)
• STUDY FOR QUIZ FRIDAY AND TEST MONDAY!!!!

NEXT SCRIBE: CHRISTINA****

1.DNA-mRNA-tRNA worksheet

• Practice on sequencing DNA to amino acids
• MAKE SURE WHEN DOING SO, YOU USE m-RNA FOR THE CHART**
• If absent, it can be picked up in the classroom

2. Content Quiz

• Practice for the test
• If absent, can be picked up in the classroom

3. Answered Questions

• If you began the homework and had any questions, you could ask them then
• If you are doing the homework now and still have questions, make sure to keep them somewhere to ask in class tomorrow!**

4. Watched a few videos...

• Here are the links to some really helpful ones I found on youtube:
• http://www.youtube.com/watch?v=8dsTvBaUMvw&feature=relmfu
• http://www.youtube.com/watch?v=983lhh20rGY
• Also there is a good youtube account that makes TONS of videos on this topic and it is:
• DNALearningCenter

5. In Class Activity: DNA models.

• Created a DNA model using plastic tubes and connecters resembling the pieces of DNA
• • This is an example of what it looked like.

• Then we went on to replicate protein synthesis.

This lasted until the end of the period.

GOOD LUCK GUYS!!

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**