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repressor proteins block the gene physically and prevent transcription from occurring
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∙ 12y ago
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Is an expressed gene turned off?
No. If a gene is expressed, it is turned on.
What does it mean for a gene to be turned off or not expressed?
Transcription into RNA does not occur for that gene.
What is gene silencing?
When a gene is "turned off", usually by a newish discovery called miRNA.
What is an AADL Arabidopsis?
It is an arabidopsis plant with the AADL protein "turned off." Scientists insert a nucleotide into the gene sequence which stops the AADL gene from being able to function. The AADL gene tells a ribosome to make the AADL protein. With it being turned off, the AADL protein never gets made.
What is an example of a signal molecule that can bind to an intracelluar receptor and therby cause a gene to be turned on or off?
steroid
What is an example of a signal molecule that can bind to an intracellular receptor and thereby cause a gene to be turned on or off?
steroid
What are genes that are turned off called?
The genes are controlled by the control elements in their upstream sequence. It can also regulated at RNA level by si, sh RNAs. The regulation is basically influenced by the surrounding environments. Proteins mediated the regulation of gene expression.
What gene causes lupus?
it has been suggested that DNase1, part of the "junk" DNA in the nucleus, is responsible. I recall an experiment with mice where this gene was turned off and mice started presenting with signs of SLE.
How are genes turned on and off in a cell?
Each cells in our body expresses. That means turning ON only the part of its genes. The rest of the part are usually repressed (i.e turned off). The process of gene turning ON and OFF is called as gene regulation. And it is one of the important part of each cell development and activities. Because this is the stage where each cell in our body is differentiated from others. For example the cardiac cell is different from nephrotic cells, neurons, muscle cells etc. There are various cell factors and environmental factors that affect the gene regulation. The signals from adjacent or other cells activates gene regulation. Gene regulation can happen at any moment during gene expression but usually occurs at the transcription phase (i.e Transforming the DNA into mRNA [Messenger RNA]).
What does it mean for a gene to be off?
How is a gene not expressed
If a specific kind of protein is not continually used by a cell the gene for that protein is?
the gene is never expressed. ^^^^ this guy is a frickin idiot. and this would more of be in the cells/ biology section. What happens is a repressor binds to the operator and turns off the gene so the protein doesn't get made. and when its needed the repressor detaches and the gene is turned back on. ( this all happens on a strand of DNA )
Do The actions of DNA binding proteins help to determine whether a gene is turned on or off?
No, that is false. according to prentice hall biology book chapter 12 section 5
