An epitope is ________ amino acids long
A) 3-5
B) 10-15
C) 50-60
D) 700
Answer: B
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Which of the following is the correct order of steps of gas transport and exchange?
A. ventilation, diffusion across the respiratory surface, circulation, diffusion between blood and cells B. diffusion across the respiratory surface, ventilation, diffusion between blood and cells, circulation C. ventilation, circulation, diffusion across the respiratory surface, diffusion between blood and cells D. circulation, diffusion across the respiratory surface, ventilation, diffusion between blood and cells E. diffusion between blood and cells, circulation, ventilation, diffusion across the respiratory surface
Repressors
a. bind to operators. b. lie between operators. c. lie between promoters. d. lie after operators. e. are part of an operon.
Whether there is a net flow of fluid into or out of a capillary at a given point along its length depends upon
A) whether the fluid contains nutrients or wastes. B) whether or not the fluid contains oxygen. C) the balance between blood pressure and osmotic pressure. D) the needs of the tissue.
We know that that there are over 50 major phyla in Bacteria; however, only about 25 of these phyla have cultured representatives. Why is this?
How are scientists attempting to culture representative from the 25 phyla that do not currently have any organisms in culture? What will be an ideal response?