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Bacterial Growth Curve
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 1) The actively growing and metabolizing phase of the bacterial growth is Logarithmic phase Stationary phase Death phase Lag phase

 2) The microorganism starts producing inhibitory compounds in stationary phase. This is because Growth rate and death rate of the microorganisms are equilibrated Rapid multiplication of organism in the log phase exploited most nutrients; hence the organism is competing for available nutrients The organism stops its growth None of the above

 3) An old culture of Escherichia coli is inoculated into a fresh media. The lag phase of the organism is then Reduced Remains constant Increased None of the above

 4) Optical density is the measure of Width of cuvette Wavelength of light Absorbance Transmittance

 5) A researcher introduced Staphylococcus aureus into Mannitol salt broth from Nutrient broth. He observed that the organism experience a long lag phase. This is because The organism needs some time to adapt with the new environment The organism is in replicating phase Mannitol Salt Broth does not promote the growth of Staphylococcus aureus Lack of sufficient inoculum

 6) The growth rate of bacteria is in Observed mean Arithmetic mean Geometric mean Harmonic mean

 7) The order of the four phases of the growth curve of a bacterial culture are Lag, Stationary, Exponential, Death Exponential, Lag, Stationary, Death Stationary, Lag, Exponential, Death Lag, Exponential, Stationary, Death None of the above

 8) The growth rate constant of an exponentially growing population of bacteria is calculated by generation time divided by ln2 generation time divided by Nt ln2 divided by the generation time None of the above

 9) When measuring concentrations using spectrophotometry, the amount of light absorbed is inversely proportional to the concentration of light-absorbing material in the cuvette. True False

 10) The generation time of Staphylococcus aureus is 30 minutes 30 seconds 25 minutes 20 minutes

 11) A culture of bacteria produces 5 generations in 2 hours. Calculate the generation time of the bacterium. 20 minutes 24 minutes 30 seconds 1 hour

 12) Starvation proteins are produced during the ............. phase of growth curve Lag phase Stationary phase Death phase Exponential phase

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