The top 20 highest-paid biopharma CEOs 1. Len Schleifer, Regeneron $41.97 million. Schleifer may have popped up on our CEO pay list just a few years ago--and stayed at or near the top--but he's been plugging away at Regeneron since he founded the company in 1988.
Most bacterial species contain a single type of chromosome, but it may be present in multiple copies. Several thousand different genes are interspersed throughout the chromosome; structural gene sequences (encoding proteins) account for the majority of bacterial DNA; nontranscribed DNA sequences between adjacent genes are termed intergenic regions.
Bacterial cells have a single circular chromosome, which is not enclosed by a nuclear envelope. During binary fission the bacterial chromosome is duplicated, the cell elongates, and the two chromosomes migrate to opposite ends of the cell. Each daughter cell receives one chromosome and is identical to the parent cell. Binary fission is a relatively fast and simple process.