Why is the tuberculosis bacterium so hard to treat and destroy in the body?
What will be an ideal response?
The bacteria may lie dormant within connective tissue pockets for years. The immune system cannot always kill the germs in these pockets; moreover, some antibiotic-resistant forms have appeared.
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Which statement best reflects the main difference between the genomes of bacteria, archaea, and eukaryotes?
A. Eukaryotes have larger genomes than bacteria and archaea since they are larger cells. B. Pathogens have larger genomes than non-pathogenic microbes since genome size is generally dependent on the presence of pathogenicity islands. C. Eukaryotes have a high gene density compared to bacteria and archaea since their genes contain introns. D. Intracellular parasites have the smallest genomes since they have evolved to lack genes that code for the synthesis of essential metabolites.
A long poly-A-tail is necessary to initiate translation. Which protein binds directly to eIF4E to inhibit translation initiation?
A) PARN B) poly-A polymerase C) PABP D) CPEB E) maskin
If genes are introduced into a yeast plasmid to serve as a shuttle vector, the plasmid has the ability to __________
A) move genes from human to yeast B) replicate in yeast or in bacteria C) degrade selected yeast genes D) recombine with yeast nuclear genes E) degrade other yeast plasmids
Which the following does not occur in the egg following fertilization?
a. Meiosis II is completed. b. Microtubules are formed. c. Calcium concentrations increase. d. The acrosomal reaction occurs. e. The cortical reaction occurs