Which of these cannot cause a mutation?
A. A mistake made by the DNA polymerase
B. A mistake made by the RNA polymerase
C. Radiation
D. A chemical
E. A virus
Answer: B
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The control of heart rate and blood pressure is based in the
A) cerebrum. B) cerebellum. C) diencephalon. D) medulla oblongata. E) thalamus.
In which area of the eye does the sharpest, most detailed, daytime vision occur?
A. Macula lutea B. Ora serrata C. Fovea D. Periphery of the retina E. Optic disc
Most of the reabsorption of filtered calcium is unregulated and occurs in the ________, but an additional amount can be reabsorbed in the _________, depending on the plasma concentration of parathyroid hormone
A. proximal convoluted tubule, distal convoluted tubule B. distal convoluted tubule, proximal convoluted tubule C. proximal convoluted tubule, descending loop of Henle D. distal convoluted tubule, medullary collecting ducts E. distal convoluted tubule, renal corpuscle
How would you describe the action a person takes when raising his/her chin to look at a plane flying overhead?
A. He or she is elevating the mandible. B. He or she is dorsiflexing the neck. C. He or she is extending the neck. D. He or she is abducting the neck. E. He or she is hyperextending the neck.