In what stage of syphilis do gummas develop?
a) Primary
b) Secondary
c) Tertiary
d) Latent
Answer: c) Tertiary
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Using the drawing of mRNA below, choose the letter that best fits the description. This region prevents rapid degradation of the mRNA transcript and is essential for translation. ____
What will be an ideal response?
Outside a cell, viruses are
A. running a small number of biochemical reactions. B. synthesizing proteins necessary for entry into the host. C. inactive. D. constructing a cell membrane known as an envelope. E. running a small number of biochemical reactions AND synthesizing proteins necessary for entry into the host.
Agar replaced gelatin as the gelling (solidifying) agent for media because
A. agar is much cheaper. B. much fewer bacteria can break down agar than gelatin. C. agar is solid at body temperature. D. gelatin became unavailable during World War II. E. much fewer bacteria can break down agar than gelatin AND agar is solid at body temperature.
Why are microsporidia so hard to classify?
A. When compared to other eukaryotic organisms, microsporidia are extremely small. B. They lack nuclei. C. The intracellular parasitic lifestyle greatly reduces the need for functional organelles. D. They are very rare.