Q: What is a small protein that helps fight infections?


Read this paragraph and choose the correct option from the provided answers:

Genetically Engineering Bacteria to Produce a Human Protein. Bacteria can be genetically engineered to produce a human protein, such as a cytokine. A cytokine is a small protein that helps fight infections.

 Choices:

- phenotype

- zygote

- glutamate

- cytokine


A:
cytokine