During an infection with Listeria, an intracellular bacterium, APCs will present antigen on MHC II molecules.
Answer the following statement true (T) or false (F)
False
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One laboratory group repeated the same experiment described by others with the identical bacterial isolate and the same growth medium and conditions used but were unable to achieve the same O.D. at 600 nm
. What is the LEAST likely cause for this discrepancy of turbidity measured? A) One lab used 16 mm wide test tubes and the other used 18 mm wide test tubes. B) One lab subtracted the yellow color of the growth medium away from the final turbidity reported whereas the other lab used colorless water. C) One lab vigorously dispersed the biofilm-forming bacteria with vortexing and the other did not. D) The two labs varied with 1000 m elevation and did not consider the influence of pressure.
Circulatory systems ____
a. are found in all animals b. result in slow distribution of nutrients and gases c. include one or more hearts d. are always closed systems e. are found in cnidarians and flatworms
Which neurons generally dominate internal events
when environmental conditions permit relaxation and digestion? a. ganglia b. pacemaker c. sympathetic d. parasympathetic e. somatic
If you were working for a pharmaceutical company trying to develop anticancer drugs, what biological process would be the best target to investigate?
A) meiosis B) mitosis C) cellular respiration D) glycolysis