Antigen Presentation And Cytokines Practice Test

A 27-year-old man has painful genital ulcers; PCR confirms HSV-2. Exam shows tender inguinal nodes; labs: elevated IFN-alpha. Viral antigen is processed endogenously and presented to cytotoxic T cells, limiting spread. Which MHC class molecule is involved in presenting the antigen in this scenario?

A 50-year-old man with chronic hepatitis B has fatigue and jaundice. Exam shows hepatomegaly; labs: ALT 220 U/L, HBV DNA high, elevated IFN-gamma. Viral peptides from infected hepatocytes are presented to cytotoxic T cells, causing hepatocyte injury. Which MHC class molecule is involved in presenting the antigen in this scenario?