Firefox File Edit View History Bookmarks Tools Window Help ? D056 Relea Biocherm

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Firefox File Edit View History Bookmarks Tools Window Help ? D056 Relea Biochermsstry WGU Studen Test and / Art and scien ?? https://secure.wguassessment.com /TestPlayer-LTI/TakeTest.aspx?fs=# wGU? EST NAME: PBBO.1 How would a stain be selected to help identify Escherichia col? Use a differential stain, such as the Gram stain, to detect thickness of peptidoglycan in the cell wall Use a differential acid-fast stain, such as the Ziehl-Neelsen stain, to detect the thick waxy cell wall Use an endospore stain, such as the Schaetfer-Fulton stain, to identify endospores Use a simple stain, such as methylene blue, to see cell shape NEXT 55 56 57 58 59 60 61 62 33/65 A FONT 2 8 2 4

Explanation / Answer

Answer-Use a differential strain like Gram stain. E.coli has an outer membrane that is composed of phospholipids and lipopolysaccharides.Lipopolysaccharides give the membrane a negative charge to the cell wall.Being a differential stain Gram stain is much more complex than simple stains.After Gram Staining the E.coli bacteria will look pink in color under the microscope.

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