Exam 7: Molecular Biology of Microbial Growth

Generation of new bacillus-shaped cells starts with one cell elongating and terminates when it splits into two separate bacilli.

When Mycobacterium tuberculosis is in the dormant state it is still susceptible to antibiotics, but the rate of death is slower.

In both cocci as well as rod-shaped cells, new peptidoglycan synthesis occurs in both directions from the central location of the FtsZ ring.

All of the following are TRUE statements concerning binary fission of microbial cells EXCEPT

Your microbiology professor is interested in isolating a particular endospore-forming bacterium from its natural environment and asks you to devise a protocol to do this. Explain how you could go about separating the endospores from the other microbes in the population.

Free HipA toxin inhibits transcription.

Describe the functions of the FtsZ protein and the Z-ring in bacterial cells.

Pseudomonas aeruginosa is a(n) ________ pathogen.

Biofilm formation is more likely to occur when Vibrio cholerae is found in low densities such as sea water.

Multiple sigma factors are essential to induce the formation of endospores.

The activity of MinC and MinD direct whether a bacterial cell will be coccoid or bacillus shaped.

Which of the following traits is NOT characteristic of the Caulobacter life cycle?

What is the function of heterocysts in cyanobacteria such as Anabaena?

________ prohibits re-initiation of chromosome replication.

All members of the genus Pseudomonas respond similarly to c-di-GMP.

Antibiotic resistance can develop in a bacterium as a result of spontaneous mutation.

Biofilm formation is known to increase the resistance of member bacteria to antibiotics. How does this happen?

Plasmids are replicated in Escherichia coli using the Par system.

In fast-growing Escherichia coli cells, multiple replication forks of genomic DNA allows binary fission to occur before the genome has been fully duplicated.

Various species of bacteria naturally produce antibiotics. What resistance mechanisms are utilized by bacteria to survive antibiotics produced by other microbes or from any antibiotics they may produce themselves?