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You are performing a Gram stain on gram-negative bacteria and you stop after the addition of the mordant. What is the appearance of the bacteria at this point?
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
Which of the following correctly traces the path of light through the compound microscope?
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
What is the total magnification of a specimen viewed with a 10x ocular lens and a 45x objective lens?
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
Which microscope achieves the highest magnification and greatest resolution?
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
Assume you stain Bacillus by applying malachite green with heat and then counterstaining with safranin. Through the microscope, the green structures are
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
Bacterial smears are fixed before staining to
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
The purpose of the ocular lens is to
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
Immersion oil is necessary when using the 100x objective on a compound light microscope
450x
affix the cells to the slide.
electron microscope
light source; condenser; specimen; objective lens; ocular lens
purple
otherwise too much light is lost to refraction and the image will be fuzzy.
endospores
magnify the image from the objective lens.
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