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You will then be able to see how they react together at the same time. You will be able to notice any changes that are going on.

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Q: Why is it good to run simultaneous tests on known phenylalanine positive and phenylalanine negative organisms?
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Related questions

Why phenylalanine give negative result with xanthoproteic test?

Phenylalanine gave a yellow to orange color in xanthoproteic test which means it is positive.


When positive and negative attract which initiate the attraction?

Because the charges are equal in magnitude, the attraction is simultaneous.


How can we differentiate between Salmonella and Proteus mirabilis and why are they are mistaken?

Proteus is phenylalanine deaminase, urease and indole positive Salmonella negative. Proteus swarm on nonselective media, Salmonella does not.


Over-inoculation of the slide with organisms in a wet mount would be a false positive or false negative?

I believe false positive


What is the positive result of pauly's test?

Phenylalanine Tyrosine Tryptophan Histidine


Is a positive plus a negative make a positive or a negative?

Positive + Negative = Negative Negative + Negative = Positive Positive + Positive = Positive Negative + Positive = Negative


What is a negative - positive?

Negative * positive = negative Positive * positive = positive Negative * negative = positive


How is dividing integers similar to multiplying integers with the resulting sign?

The rules for the sign (positive or negative) of the result of a multiplication is the same as division. For multiplication: Positive * Positive --> Positive Positive * Negative --> Negative Negative * Positive --> Negative Negative * Negative --> Positive For division: Positive / Positive --> Positive Positive / Negative --> Negative Negative / Positive --> Negative Negative / Negative --> Positive


All amino acid having an aromatic ring give a positive xanthoproteic test under identical condition?

No, not all amino acids with an aromatic ring give a positive xanthoproteic test. The xanthoproteic test is mainly positive for amino acids containing aromatic rings with phenolic groups such as tyrosine and phenylalanine. Aromatic amino acids like tryptophan do not give a positive xanthoproteic test under identical conditions.


If a negative is divided by a positive is it negative?

Yes. Negative/negative = positive Postive/Positive = positive Negative/Positive - negative


When multiplying numbers what do you do with the positive and negative signs?

Negative * positive = negative Positive * positive = positive Negative * negative = positive


When you divided a negative number by a positive number witth the answer be positive or negative?

A negative divided by a positive is negative. A negative divided by a negative is positive. A positive divided by a positive is positive. A positive divided by a negative is negative.