Macmillan Learning Many molecules, including transcription...

Macmillan Learning Many molecules, including transcription factors, work together to transcribe genes and translate the information taken from the genes into proteins. What is a transcription factor? a protein, such as RNA polymerase, that transcribes a specific DNA sequence a nucleotide sequence that signals a ribosome to start protein translation a protein that binds to a specific DNA sequence to regulate transcription a protein that binds to a specific mRNA to prevent it from being translated a nucleotide that binds to a specific DNA sequence to repress translation

Transcript

00:01 Rna is very important to cells and for protein synthesis and cellular reproduction.

00:07 So we've spent a lot of time learning about it and i'm going to break a few things down for you.

00:11 First off, there are three types of rna.

00:14 There is messenger rna or mri, ribosomal rna or r rna, and transfer rna or t rna.

00:27 So i'm going to start by talking about m rna.

00:30 Now, m rna is part of the process of transcription, which is unique to the mrna.

00:40 The other two are part of translation.

00:49 But talking about m rna, transcription is the process of basically reading the dna.

00:57 You untwist it, read one half of the double helix, and then you make a copy of that.

01:04 And we all know that the dna is in the nucleus of the cell, assuming that it has one.

01:15 So m rna is part of the transcription.

01:18 It's in the nucleus.

01:20 That's where we make it.

01:23 And the purpose of m rna is to be a template of the dna.

01:35 And as we untwist the dna, we read one side of the double helix.

01:41 The mrna reflects that one side, and so it looks something like that.

01:46 Just nice and simple.

01:49 All right, the next rna we encounter in this process.

01:53 So after transcription, we go to translation where we take that template of the dna, and we begin to make a protein based on that code, which is the process of translation, reading the code and making the protein.

02:09 So next we encounter our rna, ribosomal, rna...

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