Obligate parasite

Virus cannot autonomously replicate. It's an obligate parasite of a cell. Think of it as a large multimolecular complex which can use replicative enzymes ...

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... the wasps and the wood lice. Wolbachia pipientis, a bacterium and obligate intracellular parasite, lives in the ovaries and testes of many insect species. As many as 16% of insects ...

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