What is the name of the lymphatic tissue located in the small intestine and appendix?
A. Peyer patches
B. polyps
C. tonsils
D. adenoids
E. nodes
Answer: A
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Gene therapy has not yet cured any patient of his or her genetic disorder
a. True b. False
What well-characterized sequence in E. coli is 245 bp, AT-rich, and divided into three 13-mers and four 9-mers?
What will be an ideal response?
Papillary muscles:
A. contract when the ventricles relax B. prevent the valves from closing during ventricular diastole C. are attached to the semi lunar valves via the chordae tendineae D. prevent the backflow of blood into the atria during ventricular systole E. prevent the backflow of blood into the ventricles from the aorta
When placed in an aqueous solution, amphipathic molecules will orient themselves with
A. hydrophilic hydrocarbon chains in the middle and hydrophobic head groups facing the water. B. hydrophobic hydrocarbon chains facing the water and hydrophilic head groups in the middle. C. hydrophobic hydrocarbon chains in the middle and hydrophilic head groups facing the water. D. hydrophilic hydrocarbon chains facing the water and hydrophobic head groups in the middle.