Question

fill in the blank question
viruses cannot reproduce outside of cells because they lack the machinery necessary for the synthesis of
and often do not have some or all of the enzymes necessary for the replication of
acids.
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Explanation:

Viruses rely on host cells for reproduction because they lack their own ribosomes (the machinery to synthesize proteins). Additionally, they often lack the enzymes needed to replicate their nucleic acids (DNA or RNA), which is essential for producing new viral particles.

Answer:

1. proteins
2. nucleic