The RNA molecule that is synthesized in the nucleus from a DNA template is ________.
A. rRNA
B. tRNA
C. mRNA
D. All of the choices are correct.
Answer: D
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A second nerve impulse cannot be generated until ________.
A) the membrane potential has been reestablished B) the Na ions have been pumped back into the cell C) proteins have been resynthesized D) all sodium gates are closed
What general action is shared by about half of the medical drugs currently in use?
What will be an ideal response?
Blood from the superficial structures of the head and neck is collected by the
A) vertebral vein. B) axillary vein. C) brachiocephalic vein. D) internal jugular vein. E) external jugular vein.
The spleen is
A) embedded within the mucosa-associated lymphoid tissue. B) wedged between the pancreas, the left kidney, and the diaphragm. C) medial to the stomach and just inferior to the diaphragm. D) attached to the lateral border of the stomach. E) posterolateral to the liver.