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purple
Jimmy Mueller
Wiki User
∙ 14y agoIf soluble protein is present the solution will turn from light blue to purple. if there is none there will be no reaction.
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What is the chemical indicator used to test protein?
To test for protein. Biuret or solutions of sodium hydroxide and copper sulfate. Tested with a dropper a + result will be purple or something
Why does biuret reagent turn the skin brownish purple?
Biuret reagent react with the skin proteins.
Does biuret's reagent turn lavender when heated?
No, it changes lavenderish when protein is present.
What color does iodine turn in the presence of startch?
blue/black
What is a positive result for the Biuret test?
positive result for when buiret is added to protein is blue or violet/pale lilac colour. (not pink). positive result for when iodine is added to starch is blue or black colour (not pink).
What is the chemical indicator used to test protein?
To test for protein. Biuret or solutions of sodium hydroxide and copper sulfate. Tested with a dropper a + result will be purple or something
Why does biuret reagent turn the skin brownish purple?
Biuret reagent react with the skin proteins.
Does biuret's reagent turn lavender when heated?
No, it changes lavenderish when protein is present.
If biuret reagent turns purple what substance is present?
food that has protein like milk will cause the Biuret solution to turn purple.
What color does biuret reagent turn if lipid is present?
If lipids are present, the solution will turn a purple/violet color.
What color does distilled water turn with Benedict's reagent?
The water turns a pale blue. In other words stating that it doesnt contain protein
What color does biuret reagent turn when peptides are present?
purple for longer peptides (larger proteins) and pink for shorter ones
What color does iodine turn in the presence of startch?
blue/black
What color will litmus paper turn in the presence of KOH?
The paper turn on blue.
What color will blue litmus paper turn in presence of a soap?
pink
What color will litmus paper turn in presence of a strong base?
orange
What is a positive result for the Biuret test?
positive result for when buiret is added to protein is blue or violet/pale lilac colour. (not pink). positive result for when iodine is added to starch is blue or black colour (not pink).
