When cells of a facultative anaerobe such as Paracoccus denitrificans are growing under anaerobic conditions and using nitrate as the terminal electron acceptor, ________ nitrate reduction is occurring.
Fill in the blank(s) with the appropriate word(s).
dissimilatory
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Which of the following is not a cause of increased levels of greenhouse gases?
A. All of the answer options are correct. B. burning of fossil fuels C. increasing cattle populations D. expansion of rice paddies E. thawing of the permafrost in the tundra
A patient specimen was Gram-stained upon arrival in the clinical laboratory and revealed both Gram-positive cocci and Gram-negative bacilli. The specimen was cultured on sheep blood agar and chocolate agar, and after incubation, the culture grew only the Gram-negative bacilli. Which of the following is/are a likely explanation(s) for the failure of the Gram-positive cocci to grow?
A. The Gram-negative bacilli may have grown very quickly and overgrew the slower growing Gram-positive cocci. B. The growth temperature may have enabled the growth of the Gram-negative bacilli but not the growth of the Gram-positive cocci. C. The Gram-positive cocci may be an obligate anaerobe and was unable to grow in an ambient air incubator. D. The media used may not support the growth of the Gram-positive cocci. E. All of the choices are possible explanations.
What was the color of the other pigment present in the shell extract of the Aa individuals?
a. Yellow b. Grey c. Pink
If the surface area of a cell that is shaped like a cube increases 100 times, its volume increases about
A) 5 times. B) 10 times. C) 100 times. D) 1000 times.