This is true, animals of the same species are usually the same type of animals. Like dogs with other dogs, and cats with other cats.
Answer:
B) For a gene under negative repressible control, a small molecule is required to prevent the gene's repressor from binding to DNA.
Explanation:
Operon is usually present in prokaryotes. It has a group of genes being transcribed under the same promoter. So the genes are expressed together when required. An operon can be under negative or positive control. It can further be inducible or repressible.
Under negative repressible control the operon is normally in working condition. Repressor protein is present but unable to bind to the operator. When a corepressor binds to repressor, it is activated and finally binds to the operator halting the transcription process. Hence the small molecule (corepressor) leads to binding of repressor to DNA and not the other way round. A small molecule is required to prevent the gene's repressor from binding to DNA in case of negative inducible operon.
A human can survive with only one kidney
1. Pathologist- Studies diseases. Can tell what info is needed to possibly have a cure or to prevent it.
2. Vaccine scientists- They conduct experiments, develop the vaccine, and do clinical trails.
3. Public health specialist- Teach public how to stay safe.
Protons and neutrons make the nucleus of an atom