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Urea is a product of the breakdown of proteins and nucleic acids. Where is it produced in the body?
A. liver
B. kidney
C. lung
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Virus › ViewViruses use host cells to —
A. create fermentation products
B. facilitate respiration
C. reproduce
D. create antibodies
Microbiology › View
In multiple sclerosis, autoantibodies attack
A. acetylcholine receptors on smooth muscle.
B. cells in thyroid follicles.
C. sodium pump proteins in the cell membrane.
D. myelin sheath cells of the nervous system.