After hydrogens and electrons are stripped from NADPH, NADP+:
A. is broken down further to NAD plus phosphate in the Calvin cycle
B. is sent to the electron transport chain of cellular respiration
C. evaporates from the cell
D. is sent to the Krebs cycle
E. is recycled back to the light-dependent reactions
Answer: E
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The propagation cycle that occurs in acid mine drainage is caused by
A) reduction of Fe3+ by sulfuric acid. B) the oxidation of sulfide to sulfuric acid by microbial oxidation of iron (Fe3+). C) microbial sulfate reduction. D) low pH and high oxygen concentrations.
What is the primary function of the hormone ADH?
A. regulates biological rhythms B. mediates adaptation to long term stress C. stimulates bone breakdown D. conserves water by stimulating its reabsorption from urine E. inhibits loss of calcium from bone
Hoverflies are attracted to sweets at outdoor picnics. The reaction of humans is usually to flee because of the flies' uncanny resemblance to bees. The survival of hoverflies is enhanced by:
a. mimicry b. camouflage c. warning coloration d. chemical defenses e. display behavior
All of the following organisms are eukaryotes except:
A. Archaea B. Protozoa C. plants D. Fungi E. All of the above are eukaryotes