MMBIO 261 Exam 2 RETAKE with complete solutions

Which of the following are necessary for something to be classified as a virus? a. protein coat b. DNA genome c. RNA genome d. either DNA or RNA genome e. envelope protein coat and either DNA or RNA genome which of the following infectious agents are simpler than viruses? a. delta particles b. bacteriophages c. prions d. chlamydial spheres e. salt crystals prions What is the standard non-enveloped virus shaped like? a. basketball b. tennis ball c. octahedron d. icosahedron e. amorphous blob icosahedron Which of the following is NOT a possible explanation for the origin of viruses? a. Remnants of the first forms of life b. RNA or DNA molecules that somehow escaped from cells carrying genes that allowed for replication c. transposons that picked up genes allowing transport between cells d. one original viral ancestor, from which all viruses are descended One original viral ancestor What are the three problems all pathogenic viruses must solve? a. how to reproduce inside a cell b. how to kill the cell in order to spread c. how to avoid the immune system d. how to spread from one person to another e. how to inhibit MHC class I f. How to block IFN from being produced How to reproduce, how to avoid the immune system, and how to spread from one person to another Which of the following describes the influenza virion? a. amorphous, enveloped b. icosahedral, enveloped c. icosahedral, non-enveloped d. amorphous, non-enveloped e. filamentous, enveloped f. bullet-shaped, enveloped amorphous, enveloped Which of the following describes the influenza genome? a. single stranded RNA, segmented b. double stranded RNA, segmented c. single stranded RNA, linear d. double stranded RNA, linear e. single stranded DNA f. double stranded DNA, circular g. double stranded DNA, linear Single stranded