Yuri is working with a chemical in lab. This chemical is composed of repetitive units that include a phosphate group, a nitrogenous base, and a sugar known as ribose. He is working with:
A) a nucleic acid. B) a lipid. C) a carbohydrate. D) a protein.
Answer: A
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Your grandmother complains that the meal she just ate was rather bland or tasteless. This is because as an elderly person, her
A. taste buds are decreasing in number and decreasing in sensitivity. B. food was prepared with little regard to taste. C. taste buds are increasing in number but decreasing in sensitivity. D. taste buds are decreasing in number but increasing in sensitivity. E. taste buds have not changed, but her taste center in the cerebral cortex has changed.
In the following enhanced radiograph of the biliary system, the arrow points to the:
A) cystic duct. B) left hepatic duct. C) common hepatic duct. D) (common) bile duct. E) pancreatic duct.
The adrenal cortex, a portion of the adrenal gland, produces:
A. corticosteroids. B. epinephrine. C. norepinephrine. D. dopamine.
In this view of the olfactory epithelium, what structure does number 6 indicate?
A. Basal cell B. Olfactory receptor cell body C. Axon of olfactory receptor cell D. Olfactory hair E. Olfactory bulb