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WorksheetsMicro 3
Total questions: 20
Worksheet time: 12mins
Which of the following is the best definition of respiration?
a sequence of carrier molecules with the final electron acceptor from the environment
a method of generating ATP
a series of reactions in which pyruvic acid is oxidized to CO2 and H2O
the complete oxidation of glucose to CO2 and H2O
This inhibition mechanism does not bind to the active site of the enzyme.
(a)
All microorganims are heterotrophs.
True
False
An apoenzyme is where the _______________ is located
cofactor
redox reaction
coenzyme
active site
An enzyme
becomes part of the final products
is heat and pH labile
is nonspecific for substrate
is consumed by the reaction
Assume you inoculated 100 facultatively anaerobic cells onto nutrient agar and incubated the plate aerobically. You then inoculated 100 cells of the same species onto nutrient agar and incubated the second plate anaerobically. After incubation for 24 hours, you should have
more colonies on the aerobic plate.
more colonies on the anaerobic plate.
the same number of colonies on both plates
no growth in the anaerobic plate
Which of the following processes does not generate ATP?
oxidative phosphorylation
substrate-level phosphorylation
the Calvin-Benson cycle
photophosphorylation
Which of the following compounds has the greatest amount of energy for a cell?
glucose
CO2
ATP
lactic acid
The time required for a cell to undergo binary fission is called the
generation time
lag period
growth curve
exponential growth rate
Which culture uses the most glucose?
E. coli growing in glucose broth at 35°C with O2 for 5 days
E. coli growing in glucose broth, supplemented with NO3- , at 35°C with O2 for 5 days
E. coli growing in glucose broth, supplemented with NO3- , at 35°C without O2 for 5 days
E. coli growing in glucose broth at 35°C without O2 for 5 days
Which culture produces the most ATP?
E. coli growing in glucose broth at 35°C with O2 for 5 days
E. coli growing in glucose broth, supplemented with NO3- , at 35°C without O2 for 5 days
E. coli growing in glucose broth at 35°C without O2 for 5 days
E. coli growing in glucose broth, supplemented with NO3- , at 35°C with O2 for 5 days
In a viable plate count, each _____________ represents a ______________ from the sample population.
hour, generation
cell, generation
colony, cell
cell, colony
Turbidometry, by means of spectrophotometry, is a method to determine the EXACT number of cells in our culture.
No
Yes
Which of the following types of media would not be used to culture aerobes?
differential media
selective media
reducing media
enrichment media
Where do photosynthetic organism, e.g. cyanobacteria, obtain their energy from?
(a)
Active transport of a substance across a membrane requires
the expenditure of ATP
water
a gradient
diffusion
Psychrophiles would be expected to grow
at low pH
on the human body
in hot springs
at refrigeration temperatures
Autotrophs use (a) as a source of carbon.
The stage in population growth with the highest rate of cell division is the
exponential phase
lag phase
stationary phase
enlargement phase
An enzyme the activation energy required for a chemical reaction.
increases
catalyzes
lowers
converts
