itskarmaboo
17.10.2019 •
Biology
The specific immune system needs to recognize_ vs _
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Ответ:
D. rinsing with alcohol during the washing step stripped the bacteria off the glass slide.
Explanation:
Alcohol is used to fix the slide means alcohol help the bacteria's cell to fix with slide or attach with slide so this is the wrong explanation. And mostly, washing is done with running tap water.
Other statements can be true for missing of bacteria on slide like incomplete air dry results in damage of bacterial cells from heat fixation. Overheating will also burst the cell by boiling of water present in bacterial cell. Insufficient heat will not completely fix the bacterial smear to the slide and due to minimal bonding the bacteria will wash out from the slide during washing step.
So, alcohol is use to fix the bacterial smear to slide and does not use to remove bacteria from slide.