Each of the following provides evidence in support of the primary role of RNA in the evolution of life EXCEPT ________.
A. RNA is less chemically stable than DNA
B. RNA catalyzes peptide bond formation during protein synthesis
C. ATP (energy currency of the cell) is a ribonucleotide
D. some RNA molecules are catalytic
E. RNA can regulate gene expression
Answer: A
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In the tropisms with which it is involved, auxin
causes
a. rapid cell division. b. hardening of cell walls. c. cell elongation. d. increased plasma membrane permeability. e. increased protein synthesis
Using the Linnaean system of nomenclature, corn is named Zea mays. What is the specific epithet in this name?
a. Zea mays b. Zea c. mays d. Quercus e. corn
When fungal populations in soils are reduced as the result of contamination by copper, one consequence is:
A) reduced decomposition of organic matter. B) substantial change in soil texture. C) substantial change in soil color. D) accumulation of fungal toxins. E) all of the above
Although Epsilonproteobacteria make up the smallest of the five proteobacterial classes, species such as Helicobacter and Campylobacter are responsible for significant human disease that range from mild to severe.
Answer the following statement true (T) or false (F)