A bacterium that you isolated from pond water appears to use light for energy. Based upon this information, you inoculate the organism into fresh media, infused with lots of carbon dioxide. Even after incubation at the correct temperature (of pond water), the organism is not growing. Your best explanation of what might have happened is
A. there was no sulfur compound added to the medium, that could be used as an electron donor.
B. there is some inhibitory chemical that is preventing the growth of the bacterium.
C. you were using the wrong type of sunlight as the energy source for the bacterium.
D. no oxygen was added to the medium so the organism died.
Answer: A
You might also like to view...
Which is the smallest unit containing the entire human genome?
A) one human somatic cell B) one human chromosome C) all of the DNA in all of the cells of one human D) all of the DNA in all of the cells of the entire human population E) one human gamete
Macromolecules can be assembled into ________ that are components of organelles and other subcellular organelles.
Fill in the blank(s) with the appropriate word(s).
What is the first level of control of eukaryotic gene transcription?
A) RNA splicing B) attachment of RNA polymerase to the promoter C) DNA packing and unpacking D) the binding and unbinding of transcription factors to enhancer sequences
In what way does the green alga Ulva resemble land plants?
A) It produces diploid gametes. B) It has a complex life cycle with diploid body cells and haploid gametes. C) It has a complex life cycle with alternation between multicellular diploid and haploid generations. D) It has a multicellular haploid stage that alternates with a unicellular diploid stage.