Question 25 Why can't acid-fast bacteria be Gram stained? O The cell wall is made of chitin. O There is no cell wall. O There is a waxy material (mycolic acids) in the cell wall. O The cell wall is made of peptidoglycan-like material that doesn't retain the dye. Question 26 O Endospores have a very low water content. 2 pts
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Gram staining is a differential staining technique used to classify bacteria into two large groups: Gram-positive and Gram-negative, based on the chemical and physical properties of their cell walls. Acid-fast bacteria, such as Mycobacterium species, have a unique Show more…
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QUESTION 5 If an Acid-Fast slide shows just blue organisms, what does this indicate? QUESTION 6 What does it mean when a bacteria is "acid-fast"? Check all that apply it is a pathogen the stain was not decolorized enough the pH of the cell wall cannot change to a base there are mycolic acids in the cell wall it is acid-fast the cells are decolorized by acid-alcohol the water wash was omitted it is non-acid fast
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Acid-fast cells would contain which of the following items not found in non-acid-fast cells? Peptidoglycan Lipopolysaccharide Mycolic acid Glycocalyx Question 5 All Gram positive bacteria are acid fast. True False
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7. What part of the bacterial cell is most involved with Gram staining, and why? 8. What cell wall component is responsible for the acid-fast property of mycobacteria? 9. Is a Gram stain an adequate substitute for an acid-fast stain? Why or why not?
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