WBR0340
| Author | [[PageAuthor::Rim Halaby, M.D. [1]]] |
|---|---|
| Exam Type | ExamType::USMLE Step 1 |
| Main Category | MainCategory::Immunology |
| Sub Category | SubCategory::General Principles |
| Prompt | [[Prompt::To study the cellular responses to Influenza virus infection, a student exposes 2 groups of mice to the virus, one group with completely ablated bone marrows, and another control group with intact bone marrows. The student notices that in the control group, levels of an intracellular protein (Protein A) in muscle cells rises in parallel with the intracellular activity of 2′–5′ oligoadenylate synthetase and serum levels of IFN-α/β. This reaction is absent in the group with ablated bone marrows, whereas Influenza viral load is much more elevated than the control group. What is the most likely function of protein A?]] |
| Answer A | AnswerA::Phospholipase |
| Answer A Explanation | AnswerAExp:: |
| Answer B | AnswerB::Endonuclease |
| Answer B Explanation | AnswerBExp:: |
| Answer C | AnswerC::Protease |
| Answer C Explanation | AnswerCExp:: |
| Answer D | AnswerD::Deoxyribonuclease |
| Answer D Explanation | AnswerDExp:: |
| Answer E | AnswerE::Ribonuclease |
| Answer E Explanation | AnswerEExp:: |
| Right Answer | RightAnswer::E |
| Explanation | [[Explanation:: Educational Objective: |
| Approved | Approved::No |
| Keyword | |
| Linked Question | Linked:: |
| Order in Linked Questions | LinkedOrder:: |