Which of the following is the first, or initiator, reaction in acid mine drainage and leaching?

A) oxidation of reduced sulfides to sulfate and the release of reduced iron (Fe2+)
B) rapid spontaneous reduction of oxidized iron (Fe3+)
C) rapid oxidation of sulfides to sulfate by oxidized iron (Fe3+)
D) microbial sulfate reduction


Answer: A

Biology & Microbiology

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Indicate whether the statement is true or false.

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Which of the following statements about complex multicellular organisms is false?

A. Complex multicellular organisms and simpler multicellular organisms perform a similar range of ecological functions. B. Regulatory genes guide the development of complex multicellular organisms. C. Large differences in the body forms of complex organisms result from different patterns of gene expression. D. When compared to their simpler phylogenetic relatives, complex multicellular organisms show greater species diversity. E. None of these statements about complex multicellular organisms are false.

Biology & Microbiology

Given the following strand of DNA: 5? CATAGCCTTA 3? Which of the following sequences is the complementary DNA strand?

A) 5? CATAGCCTTA 3? B) 3? GTATCGGAAT 5? C) 5? GTATCGGAAT 3? D) 3? GUAUCGGAAU 5? E) 3? CATAGCCTTA 5?

Biology & Microbiology

DNA that has wrapped around histones and is in a condensed form following interphase is called ________

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Biology & Microbiology