BIOL107 Lecture Notes - Lecture 3: Plant Cell, Peptide, Amphiphile

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL107
• Professor: Damián Cirelli

Document Summary

Living organisms are made of one or more cells. Example: anabaena sp. a filamentous photosynthetic bacteria. Element hard to come by in soil so plants have to use this cell. Example: you own body, made of 70 trillion cells (70 x 1012) 99: 90, 50% (50% of you is bacteria; vast majority of cells are red blood cells, 10% Large organisms are made of many small cells rather than a few large ones. Reason 1: the surface-area-to-volume problem (smaller cube has more surface area in relation to its volume in comparison to the other lab; cells would require too much energy to function if they were large) Reason 2: cell specialization (there are 200 different types of cells in the human body; each cell has different functions) Cells are bound by a membrane: the plasma membrane. Plasma membrane: all cells share certain basic features: they are all bounded by a selective barrier called the plasma membrane.