Army Special Forces soldiers wearing their distinctive green berets in 2001. U.S. Army Special Forces adopted the Green Beret unofficially in 1954 after searching for a piece of headgear that would set them visually apart.
Submitted 8 years 4 months ago by admin. An objective test is a test that has right or wrong answers and so can be marked objectively. It can be compared with a subjective test, which is evaluated by giving an opinion, usually based on agreed criteria. Objective tests are popular because they are easy to prepare and take, quick to mark, and provide a quantifiable and concrete result.
The biuret test is a chemical test used for detecting the presence of peptide bonds. In a positive test, a copper(II) ion is reduced to copper(I), which forms a complex with t â¦ he nitrogens and carbons of the peptide bonds in an alkaline solution.A violet color indicates the presence of proteins.he biuret test is a chemical test used for detecting the presence of peptide bonds. In the presence of peptides, a copper(II) ion forms a violet-colored complex in an alkalin â¦ e solution.