As electrons move down the ETC, ________ are transported into the ________
a. hydrogen ions / stroma
b. electrons / intermembrane space
c. hydrogen ions / thylakoid compartment
d. O2 molecules / thylakoid compartment
c
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The pancreas produces a variety of digestive secretions, including (select all correct choices):
A. lipase for fat digestion. B. trypsin for further protein digestion. C. bicarbonate ions to neutralize stomach acid. D. methane from fermentation. E. gastrin to stimulate HCl production.
Plasmids can carry genes that are useful to the host bacteria. These genes encode proteins that can extend the range of environments that can be exploited by the bacteria. Which of the following would be a benefit to the host bacteria?
A. a plasmid that confers sensitivity to antibiotics B. a plasmid that protects the bacteria from the host animal's immune response C. a plasmid that encodes an agent that facilitates tissue colonization D. a plasmid that confers antibiotic sensitivity and protects against a host's immune response E. a plasmid that protects against a host's immune response and facilitates tissue colonization
An animal's circulatory system should contain all of the following EXCEPT
a. blood to transport carbon dioxide and oxygen. b. blood vessels leading away from the heart. c. blood vessels leading to the heart. d. a heart to pump the blood. e. nitrogen to transport wastes
. In a majority of land ecosystems, most energy in producers flows directly to ____
a. decomposers b. other plants c. detritivores d. herbivores e. carnivores