# Growth and Nutrition of Bacteria

## Growth and Nutrition of Bacteria

 Question 1
Microaerophilic bacteria are those which require
 A 21 % oxygen for growth B low levels of oxygen for growth (lesser than O$_{2}$ present in atmosphere) C oxygen for activation of enzymes D none of the above

 Question 2
The ability of Vibrio fischeri to produce bioluminescence chemicals only when a certain population density has been reached is an example of
 A Liebig's law of the minimum B Shelford's law of tolerance C quorum sensing D Heisenberg's principle of uncertainty

 Question 3
Organisms, using organic compounds as electron donors are called
 A lithotrophs B phototrophs C chemotrophs D organotrophs

 Question 4
Nutrient content and biological structures are considered as
 A implicit factor for microbial growth B intrinsic factor for microbial growth C processing factor D none of the above

 Question 5
Which of the following is used to grow bacterial cultures continuously?
 A Chemostat B Coulter Counter C Hemostat D Petroff-Hausser chamber

 Question 6
Which of the following is the suitable temperature range for mesophiles?
 A 20-30$^\circ$C B 25-40$^circ$C C $>$40$^\circ$C D None of these

 Question 7
A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the
 A organism are aerobes B organism should be grown in an anaerobic chamber C organism cannot produce superoxide dismutase and/or catalase D organism cannot tolerate oxygen

 Question 8
A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the
 A broth is sterile B organism can tolerate oxygen C organism cannot produce superoxide dismutase and/or catalase D organism should be grown in an anaerobic chamber

 Question 9
The fragmentation occurs in
 A Streptomyces species B Nocardia species C Bacillus subtilis D None of these

 Question 10
Quantitative measurement of bacterial growth can be carried out by measuring
 A cell count B cell mass C cell activity D all of these
There are 10 questions to complete.