If a restriction endonuclease cuts a circular DNA three times, how many fragments should there be after the DNA is
subjected to electrophoresis through an agarose gel?
a. 1
b. 2
c. 3
d. 4
e. 5
ANSWER: c
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Variation that approximates a bell-shaped curve when plotted on a bar graph is
a. undergoing disruptive selection. b. undergoing stabilizing selection. c. quantitative variation. d. qualitative variation. e. in genetic equilibrium.
The liver is commonly damaged if drugs or other toxins are over consumed. Why? What will be an ideal response?
The symptoms and signs of Luft’s Syndrome include
all of the following EXCEPT a. high oxygen consumption. b. constant fever. c. flushed skin. d. abnormally shaped mitochondria. e. low number of mitochondria
What developmental event was key to the evolution of the chordates by forming the notochord and dorsal nerve cord?
A. Gastrulation B. Neurulation C. Morphogenesis D. Neural crest formation E. Organogenesis