Which of the following describes a prion?
a. enveloped viral particle with double-stranded DNA enclosed by a capsid
b. infectious RNA particle
c. infectious proteinaceous particle with no associated nucleic acids
d. a simple prokaryote with only a membrane and a nucleoid region
c. infectious proteinaceous particle with no associated nucleic acids
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Anammox is represented by which of the following equations?
A. NH4+ + 2H2O NO2- + 4H2 B. N2 + 2H2O NH4+ + NO2- C. NH4+ + NO2- N2 + 2H2O D. NO2- + 4H2 NH4+ + 2H2O E. 2H2O + 2NO3- 2NH2- + 4O2
Genomic ________ are collections of isolated genes maintained in cloning hosts.
A. books B. clones C. libraries D. digests E. DNA
Which of the following best describes why ice was used during this experiment?
a. To increase the activity of the enzyme b. To retard the breakdown of the catalase c. To purge the solution of excess air trapped during blending d. To slow the catalase molecules to increase the probability of contact with the hydrogen peroxide molecules e. To increase the size of the active site on the enzyme
Green algae and plants both have chlorophyll a and b this information has been used to
A. propose that they are closely related. B. considered an accident of nature. C. suggest that they are derived from the Archaea. D. None of the above is correct.