Answer:
B) their promoters have different affinities for RNA polymerase holoenzyme.
Explanation:
The housekeeping genes are the one whose products are involved in the vital metabolic pathways. So, these genes are mostly expressed at a constant level in the cells. However, the protein products of housekeeping genes exhibit variations in their cellular concentration.
The variation in the expression of housekeeping genes is regulated by the interaction between RNA polymerase holoenzyme and promoter.
The variations in the promoter sequences of these genes regulate the rate of the initiation of transcription by affecting the interaction between RNA polymerase-promoters. Certain promoter sequences facilitate the binding of RNA polymerase more than the other ones. This differential interaction regulates the rate of transcription initiation and accounts for variable cellular concentration of products of housekeeping genes.
Answer: There would be 3 of chromosome 21.
Explanation: Trisomy means 3 copies, so there's 3 copies of chromosome 21 instead of the usual 2.
Hello! A substrate is a reactant that is catalyzed by an enzyme. A substrate binds to an active site, and enzymes bind to the substrate. Hope this helps! :)
Answer:
Explanation:
Eurasian boar have very destructive feeding habits, an aggressive nature, the potential to spread disease, and an increasingly growing population. They feed in large quantities on agricultural crops, native vegetation, and wildlife. They destroy suitable habitat, cause erosion, and damage property.