The first penicillin-producing fungus that could be grown in stirred fermenters was ________.
A. Penicillium notatum
B. Penicillium chrysogenum
C. Aspergillus niger
D. Pisolithus tinctorius
Answer: B
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Relative to the mRNA, which of the following moves during translocation?
a. attached tRNAs and the ribosome b. attached tRNAs and the polypeptide chain c. the ribosome only d. the ribosome and the polypeptide chain e. the polypeptide chain only
Desiccation, a time-honored method of preserving food, is effective because the
A) heat of the process kills microbes. B) freezing step of the process kills microbes. C) salt concentration is too low to support metabolic function. D) UV light used in the process of sun drying penetrates effectively. E) water content is too low to support metabolic function.
A microorganism grows in the lab on medium containing mineral salts but no organic compounds. The organism is likely to be a(n)
A) heterotroph. B) autotroph. C) chemotroph. D) chemoheterotroph. E) The answer cannot be determined from the information provided.
What would happen if everyone on the planet used resources and lived the average lifestyle of an American?
A) The Earth would have the carrying capacity to sustain the human population. B) The population growth rate would immediately decrease. C) We would need multiple Earths for this to be possible. D) There would be same number of people in less-developed countries as there are Americans.