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mamaluj [8]
3 years ago
14

When carrying out the Gram stain procedure, adding too little or too much alcohol to the sample is a common mistake. Suppose a s

tudent added too little alcohol to a sample of Gram-negative bacteria. What would she observe? Why?
Biology
1 answer:
Anarel [89]3 years ago
6 0

Answer:

In the decolorization step alcohol is used which destain the gram-negative bacteria but not gram-positive because alcohol degrades the LPS cell wall of gram-negative bacteria which allow the crystal violet to moves out of the cell.

So if we use too little alcohol then the alcohol will not able to decolorize all the gram-negative bacteria and most of the cell in the culture will appear violet or purple because crystal violet retained in the cell wall of bacteria.

So the sample of gram-negative bacteria will appear as gram-positive bacteria under the microscope.

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Sergio039 [100]

Answer:

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Explanation:

The studies shown in the question above started from the same concept to establish the scientific experiment and had the same objective related to the investigation as temperature changes in the environment where these organisms live influences the enzymatic activity and, therefore, the functioning of their organism, being able to including modifying the environment around them. In summary, we can say that the studies sought to support the concept that species operate within a narrow range of optimal temperature and are coupled with enzymatic activity.

4 0
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5 0
4 years ago
A.
snow_lady [41]

Answer:

A) Light pollution both attracts and repels migratory birds

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Explanation:

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