What enzyme(s) is/are responsible for removal of RNA primers and joining of Okazaki fragments?
A) DNA polymerase I
B) DNA polymerase III
C) DNA ligase
D) DNA polymerase I and DNA ligase
E) DNA polymerase III and DNA ligase
D
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Which set of steps best accounts for the role of the axon hillock in nerve cell activity?
A. depolarization, summation, threshold, action potential B. threshold, refractory period, depolarization, action potential C. threshold, action potential, refractory period, summation D. summation, refractory period, threshold, action potential
During DNA sequencing, a laser beam scans the fragments on the electrophoresis gel to identify the ____________________
a. gene sequence by the color it fluoresces b. end nucleotide by the color it fluoresces c. useful DNA strands that will be analyzed further d. gene products that have been fixed by the gel e. gene products that have been sorted by the addition of a probe
Which of the following is a true statement?
a) Plants with secondary growth are typically the smallest ones in an ecosystem. b) Primary growth and secondary growth alternate in the life cycle of a plant. c) Secondary growth is a common feature of eudicot leaves. d) Flowers may have secondary growth. e) Secondary growth is produced by both the vascular cambium and the cork cambium.
In insects, the passage from one body form to another is called
A. pupation. B. transference. C. metamorphosis. D. ecdysis.