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it likes chicken then not its like turning it off and on
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∙ 11y ago
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What do prokaryotic and eukaryotic cells use to turn certain genes on or off?
Proteins
Can your genes turn on and off?
No, an organisms' genes cannot 'turn off' at any point. They are not mechanical in any way.
How can scientists alter genes?
By introducing chemicals into the area that (thing) that they want to alter the genes of, they can "turn off" or "turn on" different genes that were dormant or active, but pre-existed in the subject
What causes the lac genes in E. coli to turn off?
A lac repressor turns off the lac genes by binding to the operator.
How can cells have the same DNA?
Although all calls have the DNA only some parts of it are turned on different cells (this is called gene expression). Which genes of the DNA are turned on determine the functions and kinds of cell. Even in the same kinds of cell genes can be differently expessed depending on what the cell needs to do at the time. If you have a drink of alcohol for instance a whole bunch of genes turn on in the liver to detoxify the alcohol. When you have meal hundreds of genes in the stomach, intestine and blood stream kick into action to digest the food and send it away for storage or immediate use. Cells have many things that regulate gene expression some things turn genes off or down others turn them up or on. There are factors turn on whole cascades of genes.
Prokaryotic cells or eukaryotic cells come from the cheek?
Probably both. Your cheek cells, which scrape off easily, are eukaryote. The mouth is full of symbiotic bacteria which are prokaryote.
What are the 3 general properties of all stem cells?
Some properties of stem cells are their ability to self-renew and their capacity to become specialized cells.
Differentiation switches certain genes on and off to create specialized cells?
it's true
What causes differentiations of cells in complex organisms like humans?
Switching genes on and off.
The test that is used to determine the pattern of genes that are turned on or off in cancer cells is called?
Pedigree
How do dna-binding proteins in prokaryotes regulate genes?
Clever mechanisms turn genes off and on so that they only function when there is a need for their services
How can cell division cause differentiation?
If you mean change in genes, this is done by a process called recombination, whereby chromosomes switch legs at random points to help add variety to our genes. But I suspect you mean how identical cells in some kind of embryo form different types of cells. At a point in the growth of the embryo, the cells start reacting to external factors, mostly chemicals produced by the cells around it. Although all cells contain all genes, the chemicals act as a switch to turn genes on or off. Cells on the outside of the embryo get different signals than those on the inner layers. Cells also tend to express genes that are expressed in the cells surrounding it, because of the chemical signals given off by those cells. As cells start to change what genes they express and become more specialized they give off more and more specific chemicals, making the differentiation that much more complex. This is a very complicated process, but I hope that this very brief overview has helped. For more information, research developmental biology, differentiation, and specialization. I have a BS in molecular and cell biology.
