A strain of yeast translates mRNA into protein inaccuratel…

  A strain of yeast translates mRNA into protein inaccurately. Individual molecules of a particular protein isolated from this yeast have variations in the first 11 amino acids compared with the sequence of the same protein isolated from normal yeast cells, as listed in Figure 7-4. What is the most likely cause of this variation in protein sequence?   Figure 7-4   Table 7-1  

  Your friend is prescribed tetracycline—an antibiotic for a…

  Your friend is prescribed tetracycline—an antibiotic for an infection. She asks you if it is OK to take the antibiotic. As a cell biologist, you know it is relatively safe—that is, not toxic to humans—because antibiotics such a tetracycline will interfere with __________, exploiting differences between eukaryotic and prokaryotic __________.