The two major types of viruses are DNA and RNA viruses.
a. true
b. false
Answer: a. true
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During digestion
a. carbohydrates are split into proteins. b. proteins are broken down into fatty acids. c. fatty acids are split into non-fatty acids. d. carbohydrates, proteins, lipids, and nucleic acids are split into smaller chemical subunits. e. carbohydrates, proteins, lipids, and nucleic acids are split into larger chemical subunits.
The most abundant mineralocorticoid is
a. epinephrine. b. norepinephrine. c. aldosterone. d. cortisol. e. estrogen.
Positron emission tomography (PET) of a patient who has consumed the radiotracer fluorodeoxyglucose reveals tumors because
A) any radioisotope accumulates in tumor cells. B) cancer cells accumulate fluorodeoxyglucose because they consume excessive amounts of glucose through aerobic glycolysis. C) the fluorodeoxyglucose labels cells killed by the PET treatment. D) the fluorodeoxyglucose labels only the normal tissue because cancer cells cannot metabolize glucose. E) the fluorodeoxyglucose associates with the anti-tumor drugs being used for treatment.
Which cells in a multicellular organism generally contain inactive telomerases?
a. somatic cells b. embryonic cells c. germ line cells d. immune cells