The absence of protein in a solution is usually indicated by the color blue when using a reagent like Coomassie Blue. This reagent binds to proteins and causes a color change, so if the solution remains blue after adding the reagent, it suggests that there is no protein present.
Iodine turns a yellow-brown color when there is no starch present in a leaf. This color change indicates the absence of starch, which is detected by the iodine as it interacts with the leaf's compounds.
The yellow color is changed to green and then in blue.
absence of matterADDED BY JACOBM1198:Actually, white is the absence of color. Many people think that black is the absence of color because they think it is the absence of light, but it isn't true. Black absorbs all light and all color, which is why it is dark and less reflective than white, which reflects all light and color. Therefore, white is the absence of color. Absence of matter is not correct.
Iodine turns blue-black when added to a protein solution such as starch. This color change indicates the presence of complex polysaccharides like glycogen or amylose.
White is not the absence of color, but rather a combination of all colors. It reflects all wavelengths of light, making it appear bright. In contrast, black is the absence of color as it absorbs all light.
The reagent commonly used in the protein test is Biuret reagent. This solution contains copper sulfate, which reacts with peptide bonds in proteins, resulting in a color change that indicates the presence of proteins. A positive test typically shows a violet color, while the absence of protein results in a blue color.
The color of absence of color is white.
Iodine turns a yellow-brown color when there is no starch present in a leaf. This color change indicates the absence of starch, which is detected by the iodine as it interacts with the leaf's compounds.
The yellow color is changed to green and then in blue.
Is black the absence of color? Well, the answer is all in perspective. In light Black is the absence of color and white is the essence of color, but in paint black is the essence of all color and white is the absence of color.
absence of matterADDED BY JACOBM1198:Actually, white is the absence of color. Many people think that black is the absence of color because they think it is the absence of light, but it isn't true. Black absorbs all light and all color, which is why it is dark and less reflective than white, which reflects all light and color. Therefore, white is the absence of color. Absence of matter is not correct.
A positive test for protein typically appears as a violet or purple color when using chemical indicators such as Biuret reagent. This color change indicates the presence of proteins in the test sample.
Black is a colour and an absence of colour. It is all the colours if you get what i mean. It is the absence of light.
Black.Black is the absence of colour.
Black is the absence of color, while white is the presence of all colors.
Jet black.Black.ADDED BY JACOBM1198:Actually, white is the absence of color. Many people think that black is the absence of color because they think it is the absence of light, but it isn't true. Black absorbs all light and all color, which is why it is dark and less reflective than white, which reflects all light and color. Therefore, white is the absence of color. People, please don't answer questions you don't know.By the way, "jet black" is generally described as a shiny black color, so even if black WAS the absence of color, that would be wrong.
Black is considered the absence of color