Studying the redox cycling of Fe in the environment has led to the discovery
A) of bacteria that transfer electrons long distances and generate electric currents.
B) of bacteria that destroy toxic metal ions.
C) of archaea that have Fe in their cell walls.
D) that Fe limits primary production in terrestrial ecosystems.
Answer: A
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Which of the following sugars is found in
RNA and NOT in DNA?
a. glucose b. deoxyribose c. deoxyribulose d. ribose e. ribulose
Most nutrient absorption occurs in which part of the digestive system?
A) stomach B) duodenum C) the several meters of the small intestine that come after the duodenum D) large intestine
Gram positive organisms CANNOT be decolorized once stained with crystal violet
a. true b. false
A thrombus __________.
a. may form at a site of plaque formation in an artery b. is a typical complication of hemophilia c. may cause hypertension d. is a an enzyme that plays a key role in the formation of blood clots e. is often associated with high levels of HDLs in the blood