Which of the following is not true about leprosy?
A. it is caused by Hansen's bacillus in honor of its discoverer
B. the leprosy bacillus is highly virulent
C. armadillos harbor a genetically identical M. leprae
D. early signs appear as small, spotty lesions colored differently than the surrounding skin
E. the number of new cases in the US each year is about 100 to 200
Answer: B. the leprosy bacillus is highly virulent
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Transformation is used in genetic engineering to ____
a. generate bacteria with an F factor for conjugation b. understand how bacteriophages transfer DNA to bacteria c. obtain large quantities of viruses for study d. produce large quantities of the inserted DNA to increase yields of a target product e. introduce new genes into a bacterium’s mitochondrial DNA
Humans, and other animals displaying bilateral symmetry, are mirrored across which plane?
a. coronal b. transverse c. sagittal d. proximal
__________ are an ancient fungal group and the only
fungi with flagellated spores and gametes. Fill in the blank(s) with the appropriate word(s).
The right atrium
A. is the location of the pacemaker cells of a normal heart. B. prevents blood flow from the right ventricle to the right atrium. C. prevents blood flow from the left ventricle to the left atrium. D. prevents blood flow from the pulmonary artery to the right ventricle. E. prevents blood flow from the aorta to the left ventricle.