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Bacillus subtilis under ideal conditions occupies 5% of the total volume of a fermenter. Under such conditions; the culture medium (after bacilli are filtered off) has a concentration of 1mg/ml of the secreted protein trehalae
(i) Calculate the volume of culture filtrate required to purify 1 kg of trehalase
(ii) What are the total number of B. subtilis cells which produce this amount of enzyme? Assume that each cell is a cylinder which has dimensions of 1 m diameter and length 2μm.
Which of the following statements regarding the regulation of trp operon expression by attenuation is correct?
In trp operon, attenuation occurs due to hair pin loop formation between
Which of the following statements regarding the mechanism of transformation in Bacillus subtilis is false?
Which is the primary sigma factor in Bacillus subtilis?
Which of the following events occur during the stationary phase of bacterial growth?
P. Rise in cell number stops.
Q. Spore formation in some Gram-positive bacteria such as Bacillus subtilis.
R. Cell size increases in some Gram-negative bacteria such as Escherichia coli.
S. Growth rate of bacterial cells nearly equals their death rate.
T. Decrease in peptidoglycan cross-linking.
In case of Bacillus subtilis, the filaments are embedded in a mass of mucilage which forms a scum on the surface of water. It is called the
Loosening the binding between polymerase and non-specific site is important to confer higher specificity. In Bacillus subtilis what is responsible for this action?
Bacillus subtilis is a _________ bacteria.
Bacillus subtilis is recognized as safe by the FDA.