The source of dioxin as a chemical pollutant is ________
A) wood preservative
B) petroleum products
C) pulp and paper bleaching
D) rubber compounds
E) plastic manufacturing
C
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Anoxygenic phototrophs
A) may use a variety of electron donors for photosynthesis. B) are an ancient monophyletic group of bacteria. C) can be either autotrophic or heterotrophic. D) can be either autotrophic or heterotrophic and may use a variety of electron donors for photosynthesis.
In eukaryotes, ____ regulation is the first level at which gene expression is controlled
a. transcriptional b. translational c. posttranscriptional d. posttranslational e. replicative
Larger populations generally are killed as rapidly as smaller populations.
Answer the following statement true (T) or false (F)
Leader sequences contain signals that:a
prevent enzymes from degrading the newly synthesized mRNA. b. inhibit ribosome binding until the appropriate time. c. initiate chain termination. d. allow the ribosomes to be properly positioned for translation of mRNA molecules. e. allow tRNA molecules to successfully bind to mRNA.