Answer:
The lac operon is an operon, or group of genes with a single promoter (transcribed as a single mRNA). The genes in the operon encode proteins that allow the bacteria to use lactose as an energy source. coli normally metabolise glucose, but if glucose is not available in a new environment, the lac operon can allow E. coli to metabolise lactose, the sugar found in milk using the structural genes beta-galactosidase and lactose permease. The lac operon of E. coli contains genes involved in lactose metabolism. ... It normally blocks transcription of the operon, but stops acting as a repressor when lactose is present. The lac repressor senses lactose indirectly, through its isomer allolactose.
Explanation:
Answer:
If the paired chromosomes fail to separate during meiosis in the female, then the resulting daughter cells will receive either 2 or no copies of chromosome 21. If the resulting egg with 2 copies of chromosome 21 is fertilized with a normal sperm, the resulting zygote with be trisomy 21
Explanation:
There is a rapid change in the formation of the soluble rocks that occurs during this process from young to old (mature) karst topography.
Hence, Karst topography is the formation of a landscape coming the disassembling soluble rocks like the gypsum, limestone and dolomite.
Answer:
On the Gizmo it only shows one DNA fingerprint scan, meaning that it scans only one out of the four nitrogenous bases. Therefore, it is not entirely accurate, resulting certain frogs not being entirely identical twins.
Explanation:
That good?