Rosalind Franklin used which technique to determine
many of the physical characteristics of DNA?
a. transformation
b. transmission electron microscopy
c. density-gradient centrifugation
d. X-ray diffraction
e. all of these
Answer: d
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Which nutritional classification would you predict to fit most of the well-known members of the human microbiome?
A. Chemolithohetertrophs B. Chemoorganoheterotrophs C. Photolithoautotrophs D. Chemolithoautotrophs
Which type of media is designed to distinguish microorganisms on the basis of certain growth characteristics?
a. Selective b. Nutritive c. Differential d. Definitive
You have determined the base sequence for a gene from Felis catus (domestic cat) that you believe may be involved in feline leukemia. A BLASTn search results in nucleotide sequence matches from viruses, not mammals, although the similarity is low
What other bioinformatic tools or techniques could you use to investigate the function of this gene? Why would these tools or techniques be more convincing than a BLASTn search? Hypothesize why you think this result might be correct or incorrect. What will be an ideal response?
Which of the following questions can NOT be answered using the scientific method?
A. What was the first living organism on Earth? B. Does a particular gene influence aging in mice? C. How does migration affect the reproductive success of monarch butterflies? D. How does coastal development affect wetland biodiversity?