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.
E) zymogen.
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Which of the following is not a major functional class of proteins?
A) trifunctional proteins B) enzymes C) motility proteins D) regulatory proteins E) structural proteins
What would experimental results with very high statistical significance mean?
A) The hypothesis being tested is correct. B) The experiment had no bias. C) The experiment had proper controls. D) A true difference between treatment and control groups likely exists.
Which of the following bacterial genera plays an important role in environmental nitrogen cycles?
A. Nitrobacter B. Rhizobium C. Azospirillum D. both Nitrobacter and Rhizobium E. Nitrobacter, Rhizobium, and Azospirillum
Which is the only group of microorganisms that contains lipopolysaccharides (LPS)?
a. Archaea b. Bacteria c. gram-positive bacteria d. gram-negative bacteria