Answer
Operons are cluster of coordinated genes, including structural genes, an operator gene, and a regulatory gene.
Explanation:
In the The repressible operons, The transcription is usually on and repressor is in inactive form, So the specific genes are transcribed. While a regulatory molecule act as corepressor and binds to repressor protein to activate it. The repressor protein cause the inactivation of repressible operon (as the name indicate). E.g., Tryptophan Repress the trp operon.
A high level of product act as regulatory molecule (Corepressor) and turn off the operon, So anabolic pathways or synthesis of essential components are controlled by repressible operon.
In the Inducible operons, the transcription is usually off and repressor is in active form. So there is no transcription of genes. Specific Metabolite cause the activation of operon e.g lactose cause the induction of lac operon.
As a metabolite induces the operon, So they control the Metabolic pathways or breakdown of a neutrient.
Sorry, but I don't want to do your essay. I wish you luck tho :>
The daughter cells for mitosis are identical, for meiosis are different cuz crossing over has occurred.
events that occur in meiosis, but NOT mitosis include homologous chromosomes that are pairing/crossing over along in the metaphase plate.
Answer:
B.
Explanation:
They take up the host organelles to reproduce more viruses inside.
The other events that most likely occurred during the same time period would be; An environmental change that did not favor the individuals in the population with the allele most likely led to the change in allele frequency; because the allele frequency decreased by so much, there would had to have been a decrease in the population within a three generation period of time.
