BJC Patient Care Technicians (PCT) Academy Practice Exam

Which prefix means against?

Anti- A- Re- Acu-

Correct Answer:

Anti-

Explanation:

The concept relies on how prefixes modify meaning, with some indicating opposition. The prefix that means against is anti-. It signals opposing or preventing something, as in antibiotic (against bacteria) or antiseptic (against infection). The other prefixes don’t convey opposition. A- often means not or without (as in atypical, amoral). Re- means again or back (redo, rewrite). Acu- relates to sharpness or needles (acute, acupuncture), not opposition. So the correct choice is the prefix that directly expresses opposition: anti-.

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