The regulation of expression of the C. elegans gene lin14 by lin4 was one of the first known animal examples of
a. a gain-of-function mutation.
b. nested genes.
c. a riboswitch.
d. an antisense gene.
e. RNA interference.
Ans: e
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Which of the following is NOT associated with lichens?
a. primary producers in the arctic tundra b. monitoring of air pollution c. creation of soil from bare rock d. enhanced photosynthesis on trees with lichens e. nest building material for many birds
A chromosome’s gene sequence that was ABCDEFG
before damage and ABFEDCG after is an example of a. inversion. b. deletion. c. duplication. d. translocation. e. aneuploidy.
A _______ is made of all the populations of all species in a habitat.
a) ecosystem b) symbiosis c) community d) niche
Separation of the chromatids at the end of metaphase leads into the next phase, which is:
A) anaphase. B) post-metaphase. C) telophase. D) interphase. E) prophase.