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BIO1140 (689)
Lecture

Introduction to Cell Biology

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Department
Biology
Course
BIO1140
Professor
Kenneth Campbell
Semester
Winter

Description
Intro to Cell Biology-Notes What is a cell? Fundamental unit of life Every organism either consists of cells or is itself a single cell Cell Theory All organisms consist of one or more cells The cell is the basic unit of structure for all organisms Can one speak of the cell? Enormous diversity in form, function and size Simple to complex shapes 200 nm to ~13 cm diameter; can be >1 m long Shape often reflects function Jack-of-all-trades to extreme specialization Similar basic chemistry (unity) Similar chemical composition Metabolism; use of ATP as the cellular energy currency Use of DNA for genetic information Size matters… Units relevant to cell biology 1 µm = 10 m6 1 nm = 10 m9 Cells are small ‘typical’ prokaryote 1 – 5 µm ‘typical’ eukaryote 10 – 30 µm Why are cells small? SA:V ratios Rates of diffusion Adequate concentrations or synthetic capacity Prokaryotic and eukaryotic cells differ in their solutions to the problem of size Eukaryotes Protists (single-celled org
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