A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro. A phenotypic variant of the species has the peptide sequence Leu-Pro-Cys-Ser-Pro. This is an example of a(n) ________ mutation
A) nonsense
B) missense
C) silent
D) frameshift
E) inversion
B
Bloom's Taxonomy: Application
Section: Mutations of Genes
Learning Outcome: 7.21
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If the differently shaded portions of this molecule represent different polypeptide chains, then this
figure is representative of:
a. an amino acid.
b. the quaternary structure of a protein.
c. a steroid hormone.
d. cellulose.
e. a carotenoid.
The Internet has been used as a rapid means to obtain information, including scientific ideas. Which one of the following statements about the Internet as a source of scientific information is FALSE?
A) At present, the Internet is less regulated than broadcast and print media. B) Anyone can post "scientific" information, regardless of whether the information is misleading or not true. C) Information on the Internet is generally very reliable because inaccurate information is quickly removed or corrected. D) Individuals and/or groups may post information to promote their own personal interests rather than ideas that have been tested through the scientific process.
Acclimatization is the process by which animals adjust to seasonal changes. Which example is least characteristic of
acclimatization? a. An endotherm entering torpor b. A horse’s coat thickening in winter c. A fish’s metabolic rate slowing d. A bear entering hibernation e. A lizard basking in the sun
In the soil, some ________ help to decompose dead organisms and other waste materials, returning vital chemical elements such as nitrogen to the environment
A) slime molds B) animals C) protozoans D) prokaryotes