RNA Synthesis - Transcription Flashcards
To rewrite in the same language.
Transcription - DNA->RNA
Where does transcription take place?
In the nuclear envelope.
Sequence of transcription?
DNA-PreMRNA-MRNA-RIBOSOME-POLYPEPTIDE
Where does translation take place?
Rough Endoplasmic Reticulum
Where does the process take place in bacteria?
All in the cytoplasm
Rna is a:
Polymer of nucleotides
How is it related to DNA?
Structurally - Ribose not Deoxyribose (OH on 2’C)
What is the main difference in makeup between RNA and DNA?
RNA Does NOT contain Thymine.
What is used in place of thymine?
Uracil - similar, without methyl group
What does Uracil pair with then?
UA - Uracil Adenine
GC - Guanine Cytosine
What are the products of RNA synthesis known as?
Transcripts
rRNA?
rRNA - ribosomal - catalyze reaction
tRNA?
Transfer - carry amino acids
mRNA?
Message/Messenger RNA - carries information from the gene
The template for RNA?
DNA!
The template is read to make..
Pre-mRNA
Immature Pre-mRNA then leaves…
Leaves the nucleus to be transcribed
The first phase on transcription?
Initiation
A promoter (the starter) includes:
TATA Box (Encoding Sequence)
Strands run
5-3
3-5
Just past TATA…
Encoding sequence
If these are missing the process can’t begin.
Transcription Factors
Transcription factors….
Bind TATA Box & Promotor
When the right transcription factor is present in the right __________ the process can start.
Combination! Like a keypad. Spy games.