The following species, P. aeruginosa, P. fluorescens, Pseudomonas putida, P. veronii, Pseudomonas monteilii, and Pseudomonas mosselii, all produce a water-soluble, yellow-green pigment called:
a. pyocyanin.
b. pyomelanin.
c. pyorubrum.
d. pyoverdin.
D
P. aeruginosa, P. fluorescens, P. putida, P. veronii, P. monteilii, and P. mosselii comprise the group known as the fluorescent pseudomonads. These species all produce pyoverdin, a wa-ter-soluble, yellow-green or yellow-brown pigment that fluoresces under UV illumination. P. aeruginosa is the only species that produces pyocyanin.
You might also like to view...
If you experimentally increase the concentration of K+ inside a cell while maintaining other ion concentrations as they were, what would happen to the cell's membrane potential?
A) The membrane potential would become more negative. B) The membrane potential would become less negative. C) The membrane potential would remain the same.
The action of a new drug is unknown, so you test various aspects of eukaryotic cell processes looking for an effect. You notice that the survival of cells exposed to this drug is very low. Further analysis shows that some proteins and mRNAs are much longer than they should be. One hypothesis is that the drug interferes with
A) transcription termination signals. B) spliceosome activity. C) ribosomes. D) nucleoli. E) both choices A and B
When true breeding red tulips are crossed with true breeding white tulips, the progeny have pink flowers. This is an
example of: a. incomplete dominance. b. codominance. c. pleiotropy. d. epistasis. e. norm of reaction
When building a cladogram, the length of the horizontal branch is based on the calculated percent similarity between organisms
Indicate whether the statement is true or false