In the Biuret test, which ions interact with peptide bonds to detect proteins?
Understand the Problem
The question is asking about the specific ions that are known to interact with peptide bonds during the Biuret test, which is a method for detecting proteins. To answer this, we need to identify which of the listed ions has the relevant chemical interaction with peptide bonds.
Answer
Copper ions (Cu2+)
In the Biuret test, copper ions (Cu2+) interact with peptide bonds to detect proteins.
Answer for screen readers
In the Biuret test, copper ions (Cu2+) interact with peptide bonds to detect proteins.
More Information
During the Biuret test, the presence of peptide bonds is indicated by a color change to purple, which occurs when copper ions form a complex with these bonds.
Tips
A common mistake is assuming the color change is due to a reaction with all types of bonds in the solution, rather than specifically with peptide bonds.
Sources
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