MCB 100 Practice Test Questions and Correct Answers
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Course
MCB 100
Institution
MCB 100
For the given bacterium, growing in a particular medium, at a specified temperature, the growth rate is 1.111 generations per hour. What is the generation time? 54 minutes per generation
Some microorganisms can use this type of metabolism to survive and grown in the absence of non-combined oxygen ...
MCB 100 Practice Test Questions and
Correct Answers
For the given bacterium, growing in a particular medium, at a specified temperature, the
growth rate is 1.111 generations per hour. What is the generation time? ✅54 minutes
per generation
Some microorganisms can use this type of metabolism to survive and grown in the
absence of non-combined oxygen (O2). ✅-denitrification
-photosynthesis
-lactic acid fermentation
Which of the following statements about enumerating bacteria by using the viable plate
count method is false? ✅To do a viable plate count you must always use a rich
general purpose medium and incubate the petri dishes overnight at 37 degrees C under
aerobic conditions
Which of he following statements about bacterial growth is false? ✅In the exponential
or log phase, bacterial numbers decrease as a result of nutrient exhaustion
For a bacterial culture that is growing in exponential phase with a generation time of 24
minutes, how many cells can be produced from one cell in eight hours? ✅About a
million
Which of the following statements about the various forms of microbial metabolism that
exist is false? ✅In ethanol fermentation, most of the ATP that is produced is made by
the proton-ATPase, using the proton motive force that is made by reaction of the
electron transport chain.
Which one of the following is a feature of aerobic respiration in a chemoheterotroph?
✅Most of the ATP that is produced in aerobic respiration is made by the proton-
ATPase, using the proton motive force that is made by reaction of the electron transport
chain
Which one of the following statements about enzymes is false? ✅An enzyme can
make an unfavorable chemical reaction become favorable
What is a "feedback inhibition"? ✅A form of allosteric inhibition of an enzyme caused
by some metabolic intermediate
In the catabolism of glucose to CO2 by aerobic respiration, what reactions use O2?
✅Electron transport chain
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