A ________ can contain DNA or RNA as its genetic material, but not both.
Fill in the blank(s) with the appropriate word(s).
virus
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SiRNAs act primarily to inhibit
a. transcription, by binding to specific genes. b. transcription, by formation of heterochromatin. c. translation, by blocking ribosomal attachment. d. translation, by binding to an mRNA.
Which of the following may be a component of bacterial cell walls?
A) carrageenan B) lipoteichoic acids C) mycolic acid D) tubulin E) both lipoteichoic and mycolic acids
Which of the following is a true statement?
A. Species with nucleotide sequences that match closely share a common ancestor. B. Molecular biologists have suggested that bacteria are more closely related to eukaryotes than are members of the domain Archaea. C. Adaptation to the environment is not related to the origin of new species. D. The genetic language of DNA and RNA provides evidence that contradicts evolution of finches and other birds.
A flower could best be described as which of the following?
A. modified petals B. modified leaves C. modified stems D. primary buds E. incomplete leaves