The structure labeled "B" in this figure of a replication fork represents ____
a. single-stranded binding protein
b. primase
c. DNA ligase
d. helicase
e. DNA polymerase
E
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Which of the following correctly lists organization levels from the simplest to the most complex?
a. atoms, organelles, cells, tissues, organs b. atoms, molecules, tissues, organelles, organisms c. molecules, atoms, cells, organelles, tissues d. molecules, cells, organelles, organisms, organs
A distinguishing feature of the Squamata is their
A. hard shell. B. kinetic skull. C. external fertilization. D. shell-less eggs.
The movement of actin and myosin fibers in a muscle contraction contains all of the following steps EXCEPT
A. the myosin head attaches to the actin filament. B. the globular myosin head detaches from the actin filament. C. myosin rolls up from one end, forming a ball. D. the myosin head returns to its original conformation. E. the myosin filament advances relative to the actin filament.
Disease(s) in which the causative agent becomes latent is/are
A. cold sores. B. genital herpes. C. shingles. D. All of the choices are correct.