Which feature is not characteristic of all living organisms?
a. All have requirements for energy.
b. All must participate in one or more nutrient cycles.
c. All have ultimate dependence upon the sun.
d. All interact with other forms of life.
e. All must reproduce inside of organisms of other species.
ANSWER: e
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The prokaryote operon model explains gene
regulation at the level of a. replication. b. transcription. c. transcript processing. d. transcript transport. e. translation.
The human immunodeficiency virus (HIV) is an example of a retrovirus. In order to prevent incorporation of the viral DNA into the host genome, antiretroviral drugs could
A) inhibit the viral reverse transcriptase. B) inhibit retro-RNA polymerase. C) inhibit polyadenine removal. D) inhibit the viral reverse transcriptase and polyadenine removal. E) None of these are good antiretroviral strategies.
If a daughter expresses an X-linked recessive trait, she inherited the trait from ____.
A. her mother B. her father C. both parents D. neither parent E. her grandmother
An RNA that can be used by a ribosome to translate into protein is (double/positive/negative) strand RNA.
Fill in the blank(s) with the appropriate word(s).