________ is the medication given to combat morning sickness that caused deformed and missing limbs in infants in the late 1950s and early 1960s
A) Thalidomide B) Rubella C) Accutane® D) Alcohol E) Nicotine
A
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You want to know whether the virulence genes present in Bordetella pertussis are evolutionarily related to genes in the less pathogenic species B. bronchiseptica or if the virulence genes were acquired via horizontal gene transfer
What characteristic(s) would you compare to answer this question? A) percentage of GC content and codon usage B) genome size and number of introns C) number of genes in the pan genome D) ribosomal binding site and intron sequence
Which of the following is not a characteristic of a riboswitch?
A. They are structures that can form in the 5' untranslated region of some mRNA molecules. B. They exert gene expression control only at the level of translation. C. They may physically bind to small-molecule metabolites. D. Ligand-binding to a riboswitch may sequester the Shine-Dalgarno sequence.
After 24 hours incubation with a facultative anaerobic bacterium, the purple-colored Ornithine /broth denotes that the
A. pH did not change B. pH changes are irrelevant C. pH had increased after an initial decrease D. pH had decreased after an initial increase
Which statement about microarrays is false?
A) Microarrays enable scientists to determine the activity of thousands of genes at once. B) Microarrays use tiny portions of double-stranded RNA fragments from a large number of genes. C) Microarrays are used to determine which genes are active in different tissues or in tissues of different states of health. D) Microarrays use fluorescently labeled cDNA molecules to identify particular genes expressed at a particular time.