A ribozyme is an:

A. enzyme that degrades mRNA.
B. enzyme that chemically modifies tRNA base composition.
C. RNA molecule with enzymatic activity.
D. RNA molecule that guides a protein enzyme to the correct sequence.


C

Biology & Microbiology

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Which of the following are the naturally occurring obstacles scientists face when determining morphology for reconstructing phylogenetic trees?

A. I. Polymorphism B. II. Mimicry C. III. Convergent evolution D. IV. Camouflage E. All of the above F. I, II, and III G. I and II

Biology & Microbiology

The presence of lipid A in the outer membranes of Gram-Negative bacteria:

A) Affects the formation of blood clots in the host B) Causes these bacteria to be oxidase positive C) Triggers the secretion of a protease enzyme to cleave IgA in mucus D) Enables enteric bacteria to ferment glucose anaerobically

Biology & Microbiology

During the synthesis of acetyl-CoA from pyruvic acid, ________ is produced

A) ATP B) NADH C) FADH2 D) H2O E) acetic acid

Biology & Microbiology

After a major crude oil spill, a variety of specific microbes is distributed in the area of the spill. This would be an example of

A. microbial antagonism. B. microbial adaptation. C. bioremediation. D. bioreactors. E. biogeochemical cycling.

Biology & Microbiology