11 Cell Structure - Cell Structure (Ch. 6 pp. 94-104)...

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Unformatted text preview: Cell Structure (Ch. 6 pp. 94-104) “Any living cell carries with it the experiences of a billion years of experimentation by its ancestors. You cannot expect to explain so wise an old bird in a few simple words.” Max Delbruck (Nobel Prize for genetics in the 1960s) Fossil algae about 1.1 billion years old Three questions about your assumptions: There are more prokaryotic species (i.e. bacteria) than eukaryotic species (protozoa, algae, fungi, yeast, plants and animals). A. Definitely yes B. Definitely no Because they use light energy from the sun plants do have need to respire and therefore they lack mitochondria? A. Definitely Yes. B. Definitely No. Mitochondria -the power-house of the cell – are only found in the active cells like muscles that move, grow, or otherwise have need for lots of ATP. A. Yes certainly. B. No of course. You are trying to find anti-fungal chemicals for use in treatment of humans and animal fungal infections. Which would be a good target for the anti-fungal agent? A. The construction of the fungal cell wall. B. The ribosomes of the fungus. C. The generation of energy from cell respiration in the fungus. D. Any of the above. I. The types and sizes of cells. I. The types and sizes of cells. Cytology = microscopic study of cells Light m’scope resolution: about 0.2 um Electron m’scope resolution: about 2 nm You do not have to know the scale. Mycoplasma (the smallest prokaryotic cells) are about 0.1 to 0.2 um in diameter. A gallery of cells: Interesting for study: closest to the minimum genome for almost free-living life (about 500 genes, parasitic on animal and plant cells) The most common shapes of prokaryotes: used for classification Early (left) and modern (right) prokaryotes Some prokaryotes (cyanobacteria = blue-green algae) are photosynthetic Protists: group of complex unicellular free- living eukaryotic cells Stentor, a ciliate You do not have to know these examples. Yeasts are much studied because they are a eukaryotic microorganism and so share much in common in cell biology, biochemistry and genetics with animals and plants.animals and plants....
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This note was uploaded on 05/25/2011 for the course BS 111 taught by Professor Patterson during the Winter '05 term at Michigan State University.

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11 Cell Structure - Cell Structure (Ch. 6 pp. 94-104)...

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