The sex chromosome composition of a person
with Klinefelter syndrome is
a. XXX.
b. XO.
c. XXY.
d. XYY.
e. none of these
C
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What are the primary regulator units that control endospore formation?
A) allosteric proteins B) antisense RNAs C) riboswitches D) sigma factors
Some bacterial transposons, known as Tn elements, are larger than insertion sequences (IS elements) and contain protein-coding genes that have human health significance. What might such a bacterial transposon contain?
A) proto-oncogene B) dissociation element C) pseudogene D) drug resistance E) oncogene
What occurs during viral uncoating?
a. The capsid breaks apart, releasing the viral genome. b. The nucleic acid breaks apart, allowing for translation. c. The viral envelope is released. d. The viral proteins are synthesized.
A specimen has been prepared for viewing with a transmission electron microscope, using uranyl acetate as a negative stain. The area stained by the uranyl acetate will be ________ electron dense compared to specimen itself.
A. equally B. less C. more