Where is the CFTR gene expressed at the highest levels?
a. lungs
b. reproductive system
c. intestines
d. brain
e. skin
ANSWER: a
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S. pyogenes associated with invasive disease characteristically have
A. leukocidins. B. coagulase. C. streptococcal pyrogenic exotoxin A. D. streptococcal pyrogenic exotoxin B. E. streptococcal pyrogenic exotoxins A AND B.
Release of what protein is directly subject to negative feedback inhibition when blood volume rises?
A. angiotensinogen B. angiotensin II C. aldosterone D. atrial natriuretic hormone E. renin
A cell is dyed with stain that reacts with an enzyme found in the lysosome. Based on this, where else would the dye react?
a. endoplasmic reticulum. b. nucleus. c. cytoplasm. d. mitochondria.
Charcot-Marie-Tooth is the most commonly inherited peripheral neuropathy, and has no known cure. Patients suffer damage to motor and sensory neurons, leading to degeneration of muscles and gradual loss of motor control.Genetic studies have found that Charcot-Marie-Tooth may be caused by a mutation in the gene Mitofusin-2 (MFN2), which causes mitochondria to form large clumps. In what area of a neuron are these clumps most likely to cause a problem?
A. Myelin B. Synapse C. Dendrite D. Axon E. Soma