91Ó°ÊÓ

Which of the following statements does NOT apply to bacterial cell division? A. A fission ring apparatus guides the process of cytokinesis. B. Septum formation occurs to separate the two cell cytoplasms. C. A spindle apparatus is used to separate chromosomes. D. Cell division is part of the cell cycle.

If a bacterial cell in a broth tube has a generation time of 40 minutes, how many cells will there be after 6 hours of optimal growth?

The generation time for a bacterial species would be determined during the phase. A. decline B. lag C. \(\log\) D. stationary

Match each statement at the left with its term (A-E) on the right. Has optimal growth near \(37^{\circ} \mathrm{C}\) A. Hyperthermophiles B. Mesophiles C. Psychrophiles D. Psychrotrophs E. Thermophiles

Match each statement at the left with its term (A-E) on the right. Most likely to cause spoilage in the refrigerator A. Hyperthermophiles B. Mesophiles C. Psychrophiles D. Psychrotrophs E. Thermophiles

Match each statement at the left with its term (A-E) on the right. Includes most human pathogens A. Hyperthermophiles B. Mesophiles C. Psychrophiles D. Psychrotrophs E. Thermophiles

A microbe that is a microaerophilic mesophile would grow optimally at \(\quad\) and A. high \(\mathrm{O}_{2} ; 30^{\circ} \mathrm{C}\left(86^{\circ} \mathrm{F}\right)\) B. low \(\mathrm{O}_{2} ; 20^{\circ} \mathrm{C}\left(68^{\circ} \mathrm{F}\right)\) C. no \(\mathrm{O}_{2} ; 30^{\circ} \mathrm{C}\left(86^{\circ} \mathrm{F}\right)\) D. low \(\mathrm{O}_{2} ; 37^{\circ} \mathrm{C}\left(98.6^{\circ} \mathrm{F}\right)\)

If the carbon source in a growth medium is beef extract, the medium must be an example of \(a(n)\) medium. A. complex B. chemically defined C. enriched D. differential

A medium would involve the addition of the antibiotic methicillin to identify methicillin-resistant bacteria. A. differential B. selective C. thioglycollate D. VBNC

Direct methods to measure bacterial growth would include all the following, except: A. total bacterial count. B. direct microscopic count. C. turbidity measurements. D. most probable number.True or false? The majority of bacteria in a soil sample can be cultured in growth media. A. True B. False