Question 1
Elements that are required in relatively large amounts by microorganisms are called...
A.multivitamins
B. meganurtients
C. macronutrients
D. macromolecules
CORRECT ANSWER
C. macronutrients
Question 2
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
CORRECT ANSWER
A. hypotonic
Question 3
1
,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
CORRECT ANSWER
D. DNA and proteins
Question 4
Micooraginams that grow best at temperatures between 45-70 degrees celsius are called:
A. Thermophiles
B. Psycrophiles
C. Thermophobes
D. Mesophiles
CORRECT ANSWER
A. Thermophiles
Question 5
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
2
, CORRECT ANSWER
B. determines the number of viable cells
Question 6
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
CORRECT ANSWER
C. either a or b
Question 7
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
CORRECT ANSWER
D. metabolic activity
Question 8
3
Elements that are required in relatively large amounts by microorganisms are called...
A.multivitamins
B. meganurtients
C. macronutrients
D. macromolecules
CORRECT ANSWER
C. macronutrients
Question 2
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
CORRECT ANSWER
A. hypotonic
Question 3
1
,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
CORRECT ANSWER
D. DNA and proteins
Question 4
Micooraginams that grow best at temperatures between 45-70 degrees celsius are called:
A. Thermophiles
B. Psycrophiles
C. Thermophobes
D. Mesophiles
CORRECT ANSWER
A. Thermophiles
Question 5
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
2
, CORRECT ANSWER
B. determines the number of viable cells
Question 6
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
CORRECT ANSWER
C. either a or b
Question 7
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
CORRECT ANSWER
D. metabolic activity
Question 8
3
