quaternary structure is the arrangement of more than one protein molecule in a multi-subunit complex. The nomenclature here can get a bit confusing because we call a single polypeptide chain a protein if it can function on its own. ... This image shows a protein that is made of several proteins .
Tertiary Structure. The overall three-dimensional shape of an entire protein molecule is the tertiary structure. ... Salt bridges, ionic interactions betweenpositively and negatively charged sites on amino acid side chains, also help to stabilize the tertiary structure of a protein.
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there are four steps of a scientific method:
a scientist would be least likely to repeat experiment methods if experiments show results that support hypothesis, means all the techniques used for the experiments are right. the next step would be the conclusion.