BIOLOGY 207 Lecture Notes - Lecture 2: Cell Fractionation, Arthur Kornberg, Gram-Negative Bacteria
Document Summary
Eukaryotic cells have a nucleus & extensive membranous organelles. In the early 20th century, the bacterial cell was envisioned as a bag of soup full of oating ribosomes and enzymes. Bacterial cells were largely thought of as a sacks of enzymes, you know, a bunch of protein, with a circular factual chromosome and that"s about it. But more recently with advances in uorescent microscopy, we nd that bacteria in our care have intricate sub sailor organization. Modern research shows that the cell"s parts t together in a structure that is ordered, though. Necessary for unicellular organisms living in an environment that is constantly changing. Composition of the cell envelope, and ultimately whether the bacteria has a very thin, or very thick cell wall. They"re not histones--> they"re called nucleus associated proteins for naps. The nucleus is not membrane bound like a nucleus, but rather it resides inside the cytoplasm.
