|
Image courtesy of http://intranet.canacad.ac.jp:3445/BiologyIBHL1/3096
Protein synthesis is the process whereby DNA encodes for the production of amino acids and proteins. This process is divided into two parts: transcription and translation. Transcription is the process where mRNA copies the DNA code from one strand of the double-stranded helix. This process occurs before cell division in order that the daughter cell has an identical set of chromosomes. Transcription occurs when the DNA strand unwinds, seperates and is "copied" by mRNA on one strand -the antisense strand.(the other strand is called the sense strand and is not copied). After transcription the mRNA leaves the nucleus and goes into the cytoplasm to a polyribosome or endoplasmic reticulum to be translated.
The process of transcription and translation can be a bit difficult to follow:
Image viewed from http://goo.gl/HYHT9
That is the reason why our group has created a webquest to help you understand each part of the process.
Now lets watch a video which is attached below as Resource 1. This video was created by Davleun.
While watching the video, make short notes of each of the processes as well as the enzymes involved. The first process is transcription which begins with a strand of DNA. Take note at the important regions of the DNA strand. Also note the different transcription factors such as TFIID. These complexes prepare the DNA for successful binding of the RNA polymerase (an enzyme which synthesizes a RNA from the DNA strand). At the end of the transcription, newly formed RNA is released.
This should help you to better understand the process of protein synthesis. To help you further, the SILVER group has also attached some notes.
Now, we would like you to scroll down and view the video under Resource 1 and make your own short notes and after that Download the notes under Resource 2 to facilitate your own short notes.
|
