Question

multiple - choice question
does biuret reagent have to be heated?
yes, for 5 minutes
no, just agitated side to side
rewatch
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Explanation:

The biuret test for proteins does not require heating. It involves simply mixing the sample with the biuret reagent and observing the color - change. Agitation can help in the reaction process.

Answer:

NO, just agitated side to side