Two Strains of Mice Were Infected with 5 $\times$ 10⁴ PFU of Influenza a Virus, and the Survival Data

question 21

Multiple Choice

Two strains of mice were infected with 5 $\times$ 10⁴ PFU of Influenza A virus, and the survival data shown in Figure were obtained.
Next, both strains were infected again with Influenza A, and levels of type I interferons (IFN- $\alpha$ and IFN- $\beta$ ) were measured and found to be similar between the two strains. Likewise, cells from both strains expressed similar levels of the IFN- $\alpha$ / $\beta$ receptor (IFNAR) . Which of the following proteins might be more highly expressed in strain B than in strain A following Influenza A infection?

• A) MHC class I
• B) Mx-1
• C) TLR4
• D) Complement C3
• E) ICAM-1

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