Lyme disease is caused by ______ transmitted by ticks.
A) Leptospira interrogans
B) Rickettsia typhi
C) Borrelia burgdorferi
D) Proteus vulgaris
E) Rickettsia rickettsii
C) Borrelia burgdorferi
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Gehring tested the hypothesis that the Pax6 gene acts as a master regulator of eye development by introducing mouse Pax6 genes into Drosophila antennae. What happened, and did it support or refute his hypothesis?
A. A compound eye developed on the antenna; this supports the hypothesis B. A compound eye developed on the head; this supports the hypothesis. C. The antenna developed normally; this falsified the hypothesis. D. The antenna developed where the eye normally would be; this supports the hypothesis. E. The antenna developed where the eye would normally be; this falsified the hypothesis.
Type I and Type 2 diabetes mellitus have different underlying causes. Type I diabetes is characterized by a loss of the insulin-producing cells of the pancreas, leading to insulin deficiency
Type II diabetes, at least in its early stages, is characterized by a loss of sensitivity to the hormone insulin by cells that normally respond to the hormone. Which step labeled in the diagram is inhibited in BOTH type 1 and type 2 diabetes (either directly or indirectly)? A. glycogen synthesis B. hormone release C. sensory input to the pancreas D. glycogen hydrolysis
What are histones, and how are they arranged in nucleosomes?
What will be an ideal response?
Osteogenesis imperfecta is a rare human condition caused by a mutation in a gene encoding Type I collagen. In some forms of the disease, the mutation leads to the production of procollagen that has a defective extension sequence; this defect interferes with the assembly of functional collagen fibers. Which of the following symptoms would you expect to see in individuals with osteogenesis imperfecta?
A. thin discs between vertebrae B. defective kidneys and capillaries C. very strong tendons and ligaments/tight joints D. very weak bones E. respiratory problems/lung defects