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 non-cancerous tissues?
A. Because they produce more enzymes found in glycolysis.
B. Because they require more oxygen to metabolize glucose.
C. Because they are more sensitive to radiation.
D. Because they are less sensitive to radiation.
E. Because they rely more on oxidative phosphorylation than glycolysis to produce ATP.
A. Because they produce more enzymes found in glycolysis.
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In animal gametogenesis, a single primary spermatocyte generates ________ sperm, while a single primary oocyte generates ________ egg(s).
A) 1; 4 B) 1; 1 C) 4; 2 D) 4; 1 E) 4; 4
As the first steps in creating recombinant DNA molecules were taking place, scientists immediately realized that
modifying the genetic information in ____________________, a bacterium from the human gut, could be potentially dangerous. Fill in the blank(s) with the appropriate word(s).
Suppose that some marine bacteria that are normally bioluminescent are NOT any more. As a result, what would the bacteria most likely be unable to do?
a. They would be unable to scare off potential predators. b. They would be unable to feed. c. They would be unable to communicate. d. They would be unable to reproduce.
What is a muscle that encircles a tube and controls the movement of food through the digestive tract is called?
What will be an ideal response?