Part A Selecting the Most Appropriate Method of Viewing Thi

observing Microorganisms Through a Microscope Foundation Figure 3.2 Reset (Help n determning the three dimensional confirming the 9 2 microtubule examining your cat for the presence of viewing a cross section of poliovirus shape and arrangement of bacterial arrangement in a eukaryobc flagelum (30 nm) viewing the three-dimensional shape viewing ribosomes (20 nm) within a examining a dinical presence examining a blood smear for the of a protozoan and the arrangement es a sputum for the distribution of clia on its surtace U and viewing the layers of the gram- negative cell wall in crosssection Transmission electron scanning electron microscope Light microscope Unaided eye microscope Hints My Answers Give Up Review Part

Solution

Transmission Electron Microscope (TEM)

answer :

Viewing ribosomes (20nm) within a bacterial cells;

confirming the 9+2 microtuble arrangement in a eukaryotic flagellum;

viewing a cross section of poliovirus (30nm);

view the layers of the gram-negative cell wall in cross section

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light microscope

answer :

Examining a clinical specimen, such as a sputum smear for the presence of bacteria; examining a blood smear for the presence of malarial parasites

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Scanning Electron Microscope (SEM)

answer

Viewing the 3-D shape of a protozoan and the arrangement and distribution of cilia on its surface; determining the 3-D shape and arrangement of bacterial cells

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answer

Bacterial Plasmids (20nm)<Mastadenovirus (30nm) < Gram-pos bacteria (6µm) < Giardia lamblia protozoa (7µm) < Cionorchis sinensis trematode (5mm)

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lens that is closest to the slide and provides initial magnification of a specimen

objective lens

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used after initial focusing to sharpen the image------------fine focus knob

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platform on which side is placed for viewing-----------stage

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used to focus the light from the illuminator onto the slide-------condenser lens

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used for initial focusing should never be used when the high power objective

coarse adjustment knob

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controls how much light from the illuminator reaches the specimen-----------

diaphragm

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