Protein Synthesis-Translation+Transcription

Hello! Today we took out our homework and Mr.Finley looked it over. Make sure you looked at the transcription video for homework!!! If you watched the wrong video, make sure you go back and watch the right video and take any notes you might need!
GUESS WHAT!!!! MR.FINLEY MOVED OUR TEST TO FRIDAY!! YAYAYAYAYYAYAYAY THANK YOU! BUT: The Study Session is going to stay THURSDAY morning at 7:00-7:40!! Don't get the days confused!
NOW lets start the SCIENCE!

The homework Video Summary:

Transcription is the process in which RNA is assembled from a DNA’s template. The double helix is joined together by bonds between complementary based pairs. DNA encodes genetic information in the sequence of bases on one strand. The portion of the DNA molecule that is a single gene, or coding region, is founded by termination promoter sites. A molecule of RNA and race binds to the promoter site. It moves along the DNA separating the two strands of the double helix. Each unpaired base, now will bind to a nuclei tide in the vicinity witch each has the appropriate, complementary base. In the synthesis of RNA Uracil is the nuclei tide complementary to adenine. This process stops when the RNA and races reaches the termination site. The DNA strands bind together once again as the new RNA molecule moves away. This RNA is a copy or a transcript of the message carried in the gene.

Process Map From Homework:

Part 1:
In the nucleus...
(Transcription)

1. DNA unzips


2. Nuceotides(floating around) connect to one side of the unzipped DNA


3. mRNA is made(copy of gene)


4. mRNA leaves and DNA re zips


5. Leaves the nucleus through pores

Part 2:

mRNA heads to Ribosomes on Endoplasmic Reticulum...

(Translation)

1. mRNA joins with Ribosomes


2. Ribosomes needs message. 1 codon at a time. CODON-3 nucleotides.


3. tRNA(that match the codon from mRNA) brings the amino acids to ribosomes.


4. Takes the amino acids


5. Repeats the process and connects all the amino acids to form a protein.

Class discussions:

-When your replicating a DNA then your copying all of the DNA, the whole DNA.

-When your transcribing a DNA then your copying one part of the DNA; like the gene that colors your hair.

-We use mRNA to make proteins and we use proteins for EVERYTHING.

Why do we need to replicate our DNA?
We need to replicate our DNA because when you have new cells they need new DNA and they need that new DNA to know what to do like healing a wound.

-We break down proteins in to amino acids. We need the amino acids to create new proteins.

-Molecules make up amino acids

After we wrote everything on the smart board and had our class discussions about DNA the bell rang and we were off to lunch!

Vocabulary you might want to know:

• mRNA-Messenger RNA


• tRNA-transfer RNA


• Codon-3 nucleotides

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2/16/11