In a PET scan a patient is injected with radioactively labeled glucose. Why would cancer cells take up more of the radioactive glucose than surrounding noncancerous tissues?
A. Because they require more oxygen to metabolize glucose.
B. Because they are more sensitive to radiation.
C. Because they rely more on oxidative phosphorylation than glycolysis to produce ATP.
D. Because they are less sensitive to radiation.
E. Because they produce more enzymes found in glycolysis.
Answer: E
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What information is used to calculate the age-specific fertility rate, mx?
A. the net reproductive rate of females B. total number of offspring born to females within a reproductive age class C. the per capita growth rate of all females D. number of female offspring born to females within a reproductive age class E. the average age of first reproduction for females
When FAD and NAD gain electrons and hydrogens during glycolysis and the Krebs cycle, they are said to be ________.
Fill in the blank(s) with the appropriate word(s).
What type of vaccine involves host synthesis of viral antigens?
A) conjugated vaccine B) subunit vaccine C) nucleic acid vaccine D) attenuated whole-agent vaccine E) toxoid vaccine
A ________ group consists of the most recent common ancestor and all of its descendants.
Fill in the blank(s) with the appropriate word(s).