0
Why phenylalanine give negative result with xanthoproteic test?
Wiki User
∙ 12y ago
Phenylalanine gave a yellow to orange color in xanthoproteic test which means it is positive.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Why glysine give negative result in xanthoproteic test?
No because it doesn't contain aromatic group
All amino acid having an aromatic ring give a positive xanthoproteic test under identical condition?
yes! but actually for phenylalanine it just weakly positive or negative because the aromatic ring is not activated so it is not give the positive result...phenylalanine need certain condition to give positive result
Does human insulin give positive xanthoproteic test?
No because it doesn't contain aromatic group
What tripeptide will give a positive xanthoproteic test?
No, because phenylalanine does not react with the nitric acid in this test.
Will adrenaline give a positive xanthoproteic test?
yes
When multiplying two numbers with different signs the result will be?
Multiplying a positive and negative number will give a negative result. The result is a negative number.
What are positive and negative controls in an experiment?
Positive controls : an experimental treatment that will give the desired result Negative controls: An experimental treatment that will NOT give the dersired result.
Why amino acids give yellow colour with nitric acid?
In this reaction the yellow xanthoproteic acid is formed.
Can drinking too much water give a negative result for infection?
No
Which aldehyde do not give fhelings test?
All aldehydes give a positive result with Fehling's test. All ketones give negative results.
Why does negative times negative give a positive result?
2 negatives equal a positive or if you multiply a negative by a positive it is larger negative if you multiply a negative and a negative it become positive because doing something negative times is getting bigger
Why fehling reaction give negative result with starch?
Due to absence of free hemiacetal group
