Listeria monocytogenes causes listeriosis, an important ________.
A. water-borne infection
B. food-borne infection
C. insect-borne infection
D. air-borne infection
Answer: B
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A urine sample from a 26-year-old woman is examined, and an organism is observed that displays "jerky" motility. This organism is classified as a(n):
a. amebae. b. coccidia. c. flagellate. d. ciliate.
How is a gradient of H+ ions formed across the inner mitochondrial membrane?
A. The electron transport chain uses energy from transfer of an electron donated by NADH to pump H+ across the inner mitochondrial membrane against its electrochemical gradient. B. ATP synthase generates a H+ gradient across the inner mitochondrial membrane. C. Electrons move from NADH to a chain of proteins with lower electronegativities. D. The electron transport chain uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient. E. The electron transport chain of proteins contains pores that are leaky to H+.
In a biology lab experiment, you and your classmates planted seeds from eudicot and monocot plants in soil that had been processed to remove nutrients. The seeds of each plant were still able to perform metabolism, enabling them to germinate and develop into seedlings. The nutrients were provided from the
A. spore coat. B. seed coat. C. endosperm. D. pollen grain. E. fruit.
__________ molecule(s) can be detected as it (they)
pass(es) through the human body and is (are) used for diagnosis. a. A decay b. A tracer c. An electron d. An atomic e. Both the proton and electron