0
What is the positive result in the hopkin's- cole test for proteins?
Wiki User
∙ 15y ago
a purple /violet ring is formed at the junction .. that's what i get in our experiment.. and its correct..:)
Wiki User
∙ 13y ago
The positive result in the Hopkins-Cole test for proteins is the formation of a white or cream-colored precipitate. This indicates the presence of proteins in the test sample.
Wiki User
∙ 15y agofuchsia fuchsia
Wiki User
∙ 14y agopink to violet interface
Add your answer:
Earn +20 pts
What is the Hopkins-Cole test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
What is the role of concentrated H2SO4 in Hopkins-cole test?
Concentrated H2SO4 is used in the Hopkins-Cole test to dehydrate the carbohydrates present in the sample, converting them into furfural derivatives. These derivatives then react with aniline to produce a colored product, allowing for the detection of the presence of pentoses and hexoses in the sample.
What is color of Hopkins-cole test?
The Hopkins-Cole test is a test for detecting the presence of reducing sugars, such as glucose, in a sample. The color change observed in the test varies depending on the specific reagents used, but it typically involves a color change from blue to green or yellow in the presence of reducing sugars.
Hopkins cole reagent?
The Hopkins Cole reagent is a chemical solution used to detect the presence of tryptophan in a sample by producing a blue color reaction. It is commonly used in biochemical experiments to identify the amino acid tryptophan in proteins or other biological compounds. The reagent contains chemicals like concentrated sulfuric acid and glacial acetic acid.
What is the role concentrated h2SO4 in the hopkins-Cole test?
Concentrated H2SO4 is used in the Hopkins-Cole test to dehydrate carbohydrates present in the sample, forming furfural derivatives that react with the reagent to produce a color change. This color change is then used to detect the presence of pentoses, specifically ribose and deoxyribose sugars.
What chemical grouping is responsible for a positive Hopkins-Cole test?
Tryptophan
What is the Hopkins-Cole test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
Will tyrosine test positive in Hopkins-Cole test?
Yes, it is possible (color test).
When was Albert Cole Hopkins born?
Albert Cole Hopkins was born in 1837.
When did Albert Cole Hopkins die?
Albert Cole Hopkins died in 1911.
What is the role concentrated h2SO4 in the hopkins-Cole test?
Concentrated H2SO4 is used in the Hopkins-Cole test to dehydrate carbohydrates present in the sample, forming furfural derivatives that react with the reagent to produce a color change. This color change is then used to detect the presence of pentoses, specifically ribose and deoxyribose sugars.
What is the role of concentrated H2SO4 in Hopkins-cole test?
Concentrated H2SO4 is used in the Hopkins-Cole test to dehydrate the carbohydrates present in the sample, converting them into furfural derivatives. These derivatives then react with aniline to produce a colored product, allowing for the detection of the presence of pentoses and hexoses in the sample.
What is the Hopkins Cole test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
What is the amino acid responsible for the Hopkins-cole reaction?
The amino acid responsible for the Hopkins-Cole reaction is the tryptophan because of its indole ring that in the reaction forms a violet color upon treatment of the sample with glyoxylic acid and sulfuric acid.
What is the color produced at the point of contact of the two liquids in Hopkins-Cole reaction?
This color is purple.
What is the name of the amino acid responsible for Hopkins-cole reaction test what is the formula of this amino acid?
Tryptophan.
What is Hopkins's test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
