Gene Expression

laurachavarry
Mind Map by laurachavarry, updated more than 1 year ago
laurachavarry
Created by laurachavarry about 5 years ago
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Description

a mind map on gene expression

Resource summary

Gene Expression
1 Regulatory gene
1.1 these genes are expressed continuously and at a low rate, they also create the repressor
1.2 differential gene expression
1.2.1 the expression of different genes by cells with the same genome
1.3 mutation in regulatory gene
1.3.1 a mutation may lead to the increased production of a certain gene, which can lead to cancer
2 Operons
2.1 lactose operon
2.1.1 can be switched off by the lac repressor, which is active by itself
2.1.2 inducer
2.1.2.1 a small molecule that inactivates the repressor
2.2 inductible operon
2.2.1 an operon whose synthesis is induced by a chemical signal
2.3 operator
2.3.1 an "on-off switch" that controls a cluster of functionally related genes, it controls the access of RNA polymerase to the genes
2.4 the operator, the promoter, and the genes they control make up an operon
3 Types of cells
3.1 Prokaryotic
3.1.1 a single-celled organism that has a nucleus but no organelles
3.2 Eukaryotic
3.2.1 cells found in multicellular organisms that have a nucleus and organelles
4 Molecules,Enzymes, and Proteins
4.1 repressor
4.1.1 binds to the operator and blocks attachment of RNA ploymerase to the promoter, preventing the transcription of genes
4.2 promoter
4.2.1 a site where RNA polymerase binds to DNA and begins transcription
4.3 corepressor
4.3.1 a small molecule that works together with the repressor to switch an operon off
4.4 activator
4.4.1 a protein that binds to DNA and stimulates transcription of a gene
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