BSC 2010 Chapter Notes - Chapter 4: Collagen, Microfilament, Desmosome

• School: University of Florida
• Department: Biology - Biological Sciences
• Course: BSC 2010
• Professor: Herrera Joan

Document Summary

Bsc 2010: chapter 4 summary (midterm study guide) Concept 4. 1 cells provide compartments for biochemical reactions. Cell theory states that the cell is the fundamental unit of biological structure and function. Cells are small because a cell"s surface area must be large compared with its volume to accommodate exchanges between the cell and its environment. All cells are enclosed by a selectively permeable cell membrane that separates their contents from the external environment. Concept 4. 2 prokaryotic cells do not have a nucleus. Prokaryotic cells usually have no internal compartments, but have a nucleoid containing. Dna, and a cytoplasm containing cytosol, ribosomes (the sites of protein synthesis), proteins, and small molecules. Some prokaryotes have folded membranes, for example photosynthetic membranes, and some have flagella for motility. Concept 4. 3 eukaryotic cells have a nucleus and other membrane-bound compartments. Eukaryotic cells contain many membrane-enclosed organelles that compartmentalize their biochemical functions. The nucleus contains most of the cell"s dna.