Which type of RNA is found in eukaryotes and has an instrumental role in RNA processing?
A) rRNA
B) tRNA
C) snRNA
D) mRNA
E) All of these
C
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Nitrifiers
A. are obligate anaerobes. B. are chemolithotrophs. C. convert nitrate to nitrite. D. are reducers. E. convert nitrate to nitrite AND are reducers
Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere. The substance which brought these molecules together to interact is
A. water. B. buffers. C. hydrogen. D. salts. E. acids.
Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?
A. Polyplacophora-eight calcareous plates B. Gastropoda-torsion C. Bivalvia-reduced head and no radula D. Nudibranchs-extensive gills in mantle cavity E. Cephalopoda-closed circulatory system
Which of the following has flagella that contain microtubules?
A. Bacteria B. Archaea C. Eukarya