Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Q: Question: What part of the cell helps it keep its shape? Answer: cytoskeleton

A: cytoskeleton. This is a network of fibers and tubules that crisscrosses the cytoplasm. The cytoskeleton helps the cell keep its shape.
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Q: Question: What are interferons? Answer: cytokines

A: Figure 42.4 Interferons are cytokines that are released by a cell infected with a virus. Response of neighboring cells to interferon helps stem the infection.
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Q: Question: What is usually the prey of a protist? Answer: bacteria

A:
The protist wraps around its prey, which is usually bacteria.
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