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MICROBIALOGY EXAM 2 LATEST VERSION -2025/2026- 100+
QUESTIONS AND VERIFIED ANSWERS ALL THE BEST
If cells are grown in media containing amino acids labeled with radioactive
nitrogen, most of the radioactivity will be found in the cells...
A. DNA
B. proteins
C. phospholipids
D. DNA and proteins
E. DNa and phosophlipids
D. DNA and proteins
Micooraginams that grow best at temperatures between 45-70 degrees celsius are
called:
A. Thermophiles
B. Psycrophiles
C. Thermophobes
D. Mesophiles
A. Thermophiles
Elements that are required in relatively large amounts by microorganisms are
called...
A.multivitamins
B. meganurtients
C. macronutrients
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D. macromolecules
C. macronutrients
When a microorganism is placed in a(n) ________ solution, water will eneter into
the cell and cause it to burst unless something is done to prevent it.
A. hypotonic
B. isotonic
C. hypertonic
D. osomotic
A. hypotonic
Which of the following is an advantage of the standard plate count?
A. can readily count cells that fomr aggregates
B. determines the number of viable cells
C. can be performed on very dilute samples, such as lake water
D. provides immediate results
E. can be used to count heat-sensitive bacteria
B. determines the number of viable cells
The total number of viable microorganisms remains constant in stationary phase
because:
A. there is a balance between cell division and cell death
B. there is a cessation of cell division even though the cells may remain
metabolically activie
C. either a or b
D. niether a or b
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C. either a or b
Which of the following is NOT a direct method to measuree microbial growth?
A. direct microscopic count
B. standard plate count
C. filtration on a support membrane followed by incubation on medium
D. metabolic activity
E. most probably number
D. metabolic activity
Media counting some ingredients of unknown chemical composition are called
______ media
A. undefined
B. complex
C. defined
D. synthetic
B. Complex
Which of the following is the best definition of generation time?
A. the length of time needed for lag phase
B. the length of time needed for a cell to divide
C. the minimum rate for 10 new cells to form
D. the duration of exponential growth phase
E. the timeneeded for nuclear division
B. the length of time needed for a cell to divide
MICROBIALOGY EXAM 2 LATEST VERSION -2025/2026- 100+
QUESTIONS AND VERIFIED ANSWERS ALL THE BEST
If cells are grown in media containing amino acids labeled with radioactive
nitrogen, most of the radioactivity will be found in the cells...
A. DNA
B. proteins
C. phospholipids
D. DNA and proteins
E. DNa and phosophlipids
D. DNA and proteins
Micooraginams that grow best at temperatures between 45-70 degrees celsius are
called:
A. Thermophiles
B. Psycrophiles
C. Thermophobes
D. Mesophiles
A. Thermophiles
Elements that are required in relatively large amounts by microorganisms are
called...
A.multivitamins
B. meganurtients
C. macronutrients
, 2
D. macromolecules
C. macronutrients
When a microorganism is placed in a(n) ________ solution, water will eneter into
the cell and cause it to burst unless something is done to prevent it.
A. hypotonic
B. isotonic
C. hypertonic
D. osomotic
A. hypotonic
Which of the following is an advantage of the standard plate count?
A. can readily count cells that fomr aggregates
B. determines the number of viable cells
C. can be performed on very dilute samples, such as lake water
D. provides immediate results
E. can be used to count heat-sensitive bacteria
B. determines the number of viable cells
The total number of viable microorganisms remains constant in stationary phase
because:
A. there is a balance between cell division and cell death
B. there is a cessation of cell division even though the cells may remain
metabolically activie
C. either a or b
D. niether a or b
, 3
C. either a or b
Which of the following is NOT a direct method to measuree microbial growth?
A. direct microscopic count
B. standard plate count
C. filtration on a support membrane followed by incubation on medium
D. metabolic activity
E. most probably number
D. metabolic activity
Media counting some ingredients of unknown chemical composition are called
______ media
A. undefined
B. complex
C. defined
D. synthetic
B. Complex
Which of the following is the best definition of generation time?
A. the length of time needed for lag phase
B. the length of time needed for a cell to divide
C. the minimum rate for 10 new cells to form
D. the duration of exponential growth phase
E. the timeneeded for nuclear division
B. the length of time needed for a cell to divide
