Microbial genomics is a rapidly growing field. Of great interest to geneticists is the search for new operons as new microbial genome sequences become available
What kind of "signature" or identifying feature would you look for as you searched new genomes for candidate operons?
Operons are sets of genes under common regulatory control, with promoter and operator regions situated adjacent to structural gene regions. Those regions that are conserved (i.e., occur with similar structure) across multiple genomes are good candidate operons for research and can often be identified via computer-based searches.
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The first animals evolved from ________
A) colonies of protists B) colonies of plants C) colonies of bacteria D) colonies of archaea
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What is the key activity of panel II in the accompanying figure?
A. The enzyme is consumed as the products form. B. The substrate leaves the active site. C. The conversion of substrates to products occurs. D. The product leaves the enzyme. E. The product decomposes to the reactants.
Which of the following statements about autoinducers is incorrect?
A. They bind directly to DNA to activate transcription. B. They can activate the cell that secreted them. C. N-acylated homoserine lactones are autoinducers in gram-negative cells. D. Autoinducers may stimulate the production of virulence factors
In order for a skeletal muscle fiber to contract, calcium must bind to:
A. tropomyosin. B. actin. C. troponin. D. myosin. E. the thick filament.