The lac operon is an operon required for the transport and metabolism of lactose in E.coli. When lactose is introduced to the increased medium, the lac genes are expressed due to the fact allolactose binds to the Lac repressor protein and maintains it from binding to the lac operator. Allolactose is an isomer of lactose. Small quantities of allolactose are shaped when lactose enters into E. coli. allolactose binds to the repressor protein and reasons the conformational change. As a result of this, the repressor can no longer bind to the operator area and falls off. RNA polymerase can then bind to the promoter and transcribe the lac genes. After some time, when the level of lactose decreases as it is metabolized using enzymes, it causes the synthesis of the repressor from the regulator gene. This repressor binds to the operator gene and prevents RNA polymerase from transcribing the operon and the transcription is stopped. This type of law is acknowledged as negative regulation.
Allolactose is a disaccharide comparable to lactose. It consists of the monosaccharides D-galactose and D-glucose linked thru a β1-6 glycosidic linkage alternatively of the β1-4 linkage of lactose. It may additionally occur from the occasional transglycosylation of lactose through β-galactosidase.
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In prophase , chromosome is visible and then we can see the light and dark part of that which is active !
Answer: Because the cell will expand and burst
When a cell is frozen, that means the cell temperature is going to be lowered extremely. Ice has more volume than water which is why it floating inside water. That's why if you put water in a plastic container then freeze it, the container will get pressured and swollen. If the container is not elastic enough(metal, glass), it will burst.
Same like that, the cell that got frozen can be burst too.
Answer:
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Explanation:
environment plays an important role in the healthy living of human beings. it matters because it is the only home that humans have ,and it provides air, food and other needs. Humanity's entire life support system depends on the well -being of all the environment factors.
Answer: Lactase’s function is to break down lactose into the two simple sugars it is made up of, glucose and galactose.
Explanation:
Breaking down lactose into its simple sugars makes it possible for it to be absorbed through the small intestine and used by the body.
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