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Question: question 4 not complete marked out of 1 f flag...

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Question 4 Not complete Marked out of 1 F Flag question Preparation of a smear in negative staining involves Select one: o a. spreading a mixture of bacteria and nigrosin across the slide surface from one end to the other. o b. drying the mixture of bacteria and nigrosin and then quickly heating the slide o c. tracing a mixture of bacteria and nigrosin in a zig zag motion over the slide. d. spreading the bacteria over the surface of the slide and then adding nigrosin to a portion of the slide Check
Question 5 Not complete Marked out of s Flag question Why do bacteria remain unstained during negative staining Select one: o a. The positive charge on the bacterial cell wall repels the nigrosin and prevents it from entering the bacterial cell. o b. The negative charge on the bacterial cell wall ttacts the nigrosin and prevents it from entering the bacterial cel. o C. The positive charge on the bacterial cell wall attracts the nigrosin and prevents it from entering the bacterial cell o d. The negative charge on the bacterial cell wall repels the nigrosin and prevents it from entering the bacterial cell. Check
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