When does endospore formation commence in a bacterial cell?

Comparing the different methods for counting bacterial cells, which of the following is FALSE? A. The serial dilution methods counts only viable cells.  B. The turbidity method indirectly measures the number of cells observing how much light goes through a broth sample  C. The turbidity method uses a spectrophotometer  D. The direct microscopic method counts only viable cells  E. The direct microscopic method counts both viable and non-viable cells

Don't use Ai

Match each group of bacteria with its best description. high G+C bacterial low G+C bacteria nonproteobacteria Proteobacteria deeply branching bacterial A. many thrive at high temperatures and in harsh environments; believed to similarities with ancient bacteria B. gram-positive group that includes the Actinobacteria C. gram-positive group that includes the Bacilli D. "gram-negative bacteria including the spirochetes, E. large group of gram-negative GFC group, and planctomy bacteria that includes five diverse classes

the transfer of genetic material during bacterial conjugation requires? a. flagella b. sex pili c. periplasmic flagella d. fimbriae e. cilia

Use the following diagram to answers the questions. A. Is this cell Gram + or Gram -? Provide 2 pieces of evidence to support your answer. B. If treated with Gram stain, what colour would the cell above appear? Explair what does this mean. C. Which structures above could be involved in conjugation? Why conjugation is an important process for the bacteria B C

We will perform a gram stain on our samples, so be sure to bring your instructions on gram staining. Will this procedure stain all cells? A. Yes, all prokaryotic and eukaryotic cells will be stained purple or pink. B. All prokaryotic cells will be stained. Eukaryotic cells will not be stained. C.Mycobacteria and a few other groups with special cell wall structures will not be stained. All other prokaryotic cells will be stained. Eukaryotic cells will be stained pink. D. Mycobacteria and a few other groups with special cell wall structures will not be stained. All other prokaryotic cells will be stained. Eukaryotic cells will be stained purple.

Use the following diagram to answers the questions. A. Is this cell Gram + or Gram -? Provide 2 pieces of evidence to support your choice. B. If you are infected by this bacterium can the antibiotic be effective in killing it. Explain. C. NAME and label the structures in the diagram that could be involved in conjugation? Why conjugation is an important process for the bacteria

Bacterial cells that are _______________ in shape always have an ____________________ which helps them move through solid media like tissue. Select one: a.Spirochete / Axial Filament b.Spirillum / Endoflagella c.Spirochete / Atrichous Flagellum d.None of the Above e.Spirillum / Atrichous Flagellum

In the experiments below, different prokaryotic cells were grown in broth cultures in the presence or absence of an antibiotic (either vancomycin or polymixin) After 1 hour, cells were rinsed, and the percent of bacteria that survived was determined. According to the data, which experiment (A or B) was done with vancomycin and which was done with polymyxin? Explain your reasoning in both cases. 100 0 A Bacillus E. coli with antibiotic without antibiotic B Methanoge n 100 Bacillus E. coli Methanogen