A researcher studying the human immunodeficiency virus (HIV) has infected human T cells with wild-type or Rev-deficient viruses. She extracts cytoplasmic RNA from the cells and separates each isolated RNA mixture by agarose-gel electrophoresis. She then uses northern analysis using HIV-specific probes to identify those bands that contain viral RNA. The results are presented in the following schematic drawing. Which lane (1 or 2) corresponds to cells infected with the Rev-deficient virus? What is the size of the full-length HIV genome?

Which of the following initial observations would more directly lead to this research study? a) ginko biloba is cost effective and also possesses heart-protective, antioxidant, anti-inflammatory properties. b) metformin is an effective treatment of patients with t2d, but shows side effects that complicate the disease state. c) over the past several years, the cost of treating t2d within the united states has increased dramatically. d) many plants contain molecules that improve the health and quality of life of patients with a variety of diseases like t2d. e) t2d affects millions of individuals in the usa and worldwide many of who could benefit from improved therapies.