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 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.

[Q]: Question: What state of hydrogen can be predicted based on the atoms to which it is bonded? Answer: oxidation
[A]: The oxidation state of hydrogen can also be predicted based on the atoms to which it is bonded. As with other pure elements, hydrogen has an oxidation state of zero in H 2 .

[Q]: Question: When thinking of the rate at which two gases mix, it is inverse proportional to the density of what? Answer: gas
[A]:
The rate at which two gases mix. Inversely proportional to the density of the gas.