Monday, April 8, 2013
Today we reviewed "What is a gene"
Made of DNA
Codes for a protein
Has a promoter (start sign for RNA Polymerase)
Has a Terminator (stop sign for RNA Polymerase)
Has Exons (coding region)
Has Introns ('junk' DNA)
Link for "what is a gene"
Remember! Not All genes are expressed (made into proteins!) at the same time/same cell) - we will discuss this more in translation.
We began to talk about the transition from Transcription to Translation with the process of RNA editing (processing).
After transcription, the splicesome removes the unneeded introns and then ligates (glues) the remaining exons back together. After this a guanine 5' cap is placed on the 5' end of the new mRNA along with a poly A tail at the 3' end of the complete mRNA. The mRNA then leaves the nucleus and is ready to be translated into amino acids which are the building blocks of proteins!
We then discussed the sports gene article. Don't forget to review the 4 principles of natural selection!
Heredity
Variability
Selective Pressure
Differential survival and reproduction
This article plays into our question of the term! Is biology only destiny? Only environmental? or Both?
Labels:
DNA,
exon,
intron,
Sports gene,
Transcription,
Translation
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