A kilowatt, a unit of electrical power, is
(a) 10 watts.
(b) 100 watts.
(c) 1000 watts.
(d) 1,000,000 watts.
(c) 1000 watts.
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The energy of electron transport serves to move (translocate) protons to the outer mitochondrial compartment. How does this help the mitochondrion produce ATP?
A) The hydrogen ions (protons) are transferred to oxygen in an energy-releasing reaction. B) The translocation of protons sets up the electrochemical gradient that drives ATP synthesis in the mitochondria. C) The protons pick up electrons from the electron transport chain on their way through the inner mitochondrial membrane. D) The protons receive electrons from the NAD+ and FAD that are accepted by electrons in glycolysis and the citric acid cycle.
Organisms capable of nitrogen fixation
(a) include some bacteria. (b) include some cyanobacteria. (c) may live as symbionts with other organisms. (d) all of the above.
Both DNA and RNA are made up of building blocks known as
A. genes. B. codons. C. amino acids. D. nucleic acids. E. nucleotides.
Which of the following terms best describes an organism that cannot exist in the presence of oxygen:
a. obligate aerobe b. facultative aerobe c. obligate anaerobe d. facultative anaerobe