Considering the new definition of life, all but one piece evidence supports the fact that a virus must be referred to as an organism. that is:
a) viruses contain nucleic acids.
b) viruses are capable of replication.
c) viruses have a simple cellular structure.
d) viruses have an evolutionary history and that implies lineage.

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.