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vichka [17]
2 years ago
9

You have a mixture of gram positive and gram negative cells in culture. You prepare a slide from the culture and gram stain it,

but when observing the sample using oil immersion, all cells appear purple. What is the likely technical reason why only purple-colored cells
Biology
1 answer:
Keith_Richards [23]2 years ago
8 0

Answer:

due to imperfections in the staining

Explanation:
if you skip the decolorization phase and therefore not resorb the violet stain from the wall of the gram-negative bacteria, which will not provide a base for the obtaining of safranin stain which should stain the gram-negative bacteria red or pinkish, the gram-negative bacteria will have the same color as the gram-positive, so all the cells will be purple

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Answer:

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In allosteric regulations, modulators are molecules that causes a change in the conformation of an enzyme, hence, resulting a change in enzyme activity. It can lead to a decrease or an increase of the enzyme.  When a molecule decreases the enzyme activity it called a negative modulator, when it increases or activates the enzyme activity, it is called a positive modulator.

A positive or negative modulator can either be homotrophic (substrate acts as modulator) or heterotropic (another ligand acts as modulator).

In the example above, X is negative heterotropic modulator, because the modulator is different from the substrate and it also decreases the enzyme activity.

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Emts are called for an unresponsive infant. when they arrive, they find the mother holding her child. she advises that the child
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People are genetically the same because of the large number of combinations of alleles.
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