Which term best describes the relationship between humans and E. coli, which produces vitamin K in the intestines?
A) commensalism
B) mutualism
C) symbiosis
D) parasitism
Ans: B) mutualism
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Which of the following are group A Streptococcus (GAS)?
A) Streptococcus aureus B) Streptococcus pneumonia C) Streptococcus pyogenes D) Streptococcus viridans
The sheets of red algae used to wrap sushi are actually what stage of the Porphyra life cycle?
a. sporophyte b. zygote c. gametes d. gametophyte
Monoclonal antibodies may be used to
a. treat mononucleosis. b. screen for prostate cancer. c. produce genetically modified bacteria. d. clone interferons. e. treat infected lab mice.
A sodium-potassium pump _____
A) moves three potassium ions out of a cell and two sodium ions into a cell while producing an ATP for each cycle B) move three sodium ions out of a cell and two potassium ions into a cell while consuming an ATP for each cycle C) moves three potassium ions out of a cell and two sodium ions into a cell while consuming 2 ATP in each cycle D) move three sodium ions out of a cell and two potassium ions into a cell and generates an ATP in each cycle