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Title: Biology 3/4 NotePack - Proteins
Description: An in-depth summary of all that you need to know about these crucial proteins that keep us functioning.
Description: An in-depth summary of all that you need to know about these crucial proteins that keep us functioning.
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Chap 4 Class notes
Structure of protein and monomers → hierarchy
[HIGH YIELD]
the structure of a protein determines it's shape
...
A protein funcitions at atleast 3 of the 4 structrual hierarchial levels
...
It is the
GLOBAL coiling and folding of a protein to give it a 3D structure
...
Quaternary ; → whether or not the protein consits of multiple polypeptides
Transcription and Translation
[HIGH YILED]
Transcription
RNA polyemrase and other transcription factors bind to the promoter
region of the sequence
This sends signals, instructing the undiwing of the DNA helix, leaving the
nitrogneous bases exposed
Chap 4 Class notes
1
RNA polymerase is able to commence transcription, producing a
complimnetary pre-mRNA strand, complimentary to template → Replaces
Thymine with Uracil
Once stop codon has been processed, Transcription finishes, helix forms
agian
...
addition of methyl cap to 5' end
addition of Poly-A-tail to 3' end
...
Types of Genes → regulatory and structrual + Lac operon
Lac operon
[HIGH YIELD]
the lac operon is a model to demonstarte the function of repressor
molecules that can prevent transcription by binding to the operator region,
blocking RNA polymerase from advancing from the promoter region to the
strcutural genes
...
This blocks RNA polymerase from advancing from the
promoter region to carry out Transcription
Chap 4 Class notes
2
In the presence of lactose, lactose molecules are able to bind to the
repressor molecule ( binding sites are complimentary ) This causes a
conformational change in the shape of the repressor molecule →
causes the detachment of the molecule from the operator region → RNA
polymerase is able to now advance and transcribe the stuctrual lac genes
...
Structural genes are genes that when expressed, code for the production
of proteins that are involved on upholdoing the structural intergrity of a cell
or organism → cellulose (plant cell wall ) keartin ( hair ) etc
Title: Biology 3/4 NotePack - Proteins
Description: An in-depth summary of all that you need to know about these crucial proteins that keep us functioning.
Description: An in-depth summary of all that you need to know about these crucial proteins that keep us functioning.