Recently a methanotrophic proteobacterium was reported that oxidizes methane in anoxic environments by coupling methanotrophy with nitrite reduction, known as ________. In this process of reducing nitrite (NO2-) to nitrogen gas (N2), molecular oxygen is released within the microbe, which it harnesses for methane oxidation.
Fill in the blank(s) with the appropriate word(s).
denitrification
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Which of the following is not true of the coding strand of DNA?
A. Its sequence is the complement of the primary transcript. B. Its sequence is the complement of the template strand. C. It may be located in either strand of a given chromosome. D. It is also known as the nontemplate strand. E. Its sequence is the complement of the strand of DNA copied during transcription.
Plant pathology grew in importance as a field of study after it was shown that the Irish potato blight was caused by
A. bacteria. B. viruses. C. fungi. D. amoeboid protozoa. E. water molds.
Which of the following ions plays the most prominent known role in the opening and closing of
stomata?
a. Ca2+ b. Cl? c. K+ d. NH4 + e. Na+
Deoxyribose is
a. a five-carbon sugar. b. present in RNA. c. a nitrogen-containing base. d. one type of purine.