To commit forcible seizure of place, power, functions, or the like, without right; to commit unjust encroachments; to be, or act as, a usurper. The parish churches on which the Presbyterians and fanatics had usurped. (Evelyn) And now the spirits of the mind Are busy with poor peter bell; Upon the rights of visual sense Usurping, with a prevalence More terrible than magic spell. (Wordsworth)
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... assembly of virions does require energy. That’s why viruses have to use a host to replicate; viruses lack metabolic/energetic machinery so they usurp their host’s. But this is not the same energetic question as binding to a receptor.
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