A __________ bacterial cell is able to take up DNA from the environment.
A. competent
B. virulent
C. fertile
D. transformed
E. transduced
A. competent
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All of the following are examples of ribozymes or ribozyme activity except
A) peptidyl transferase. B) autocatalytic RNAs. C) ribonuclease P. D) intron removal from pre-rRNA. E) zymogen.
The Ames test is useful as a rapid screening test to identify those compounds that
A. will respond to chemical agents. B. are mutagens. C. respond to the deletion of DNases. D. will protect an organism from cancer. E. will respond to chemical agents AND will protect an organism from cancer.
In transduction, the DNA is being moved between the two cells by
A) a third bacterial cell. B) a phage. C) transposons. D) membrane bound transport proteins.
Compare the worldwide distribution of seabirds to that of marine reptiles. Which is more widely distributed at all latitudes? Why do you think this is so?
What will be an ideal response?