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.
Single celled organisms increase their numbers by dividing and making more cells like themselves. Cell Division . When cells are dividing, they grow in size for a bit and then split in two. The cells must make copies of their chromosomes (the information storing part of the cell) before they split. Bacteria only have one chromosome.