If the leader region of the trp operon of the messenger RNA has signaled the RNA polymerase passing the attenuation region whether or not it is useful to terminate, it would be sensible for the...

If the leader region of the trp operon of the messenger RNA has signaled the RNA polymerase passing the attenuation region whether or not it is useful to terminate, it would be sensible for the attentuation region to no longer be involved in binding ribosomes and synthesizing a short polypeptide. How could this hypothesis be tested?