Brock Biology of Microorganisms 15th Edition By Michael T. Madigan – Test Bank

Brock Biology of Microorganisms 15th Edition By Michael
T. Madigan – Test Bank




Chapter 5 Microbial Growth and Its Control


5.1 Multiple Choice Questions


1) Which of the following is/are transferred to daughter cells during bacterial
cell division?

1. A) only genomic DNA, the blueprint for everything the cell needs
2. B) individual genes and enzymes to later be brought together to form
the genome
3. C) only the chromosome and enzymes to immediately begin cellular
metabolism
4. D) chromosome, proteins, and all other cellular constituents

Answer: D
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.1


2) Bacterial growth refers to

1. A) an increase in the number of cells.
2. B) the occurrence of binary fission.
3. C) the time required for one cell to divide into two.
4. D) the occurrence of mitosis.

Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.1


3) The time interval required for the formation of two cells from one is called

,the

1. A) generation time.
2. B) growth time.
3. C) growth rate.
4. D) division rate.

Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.1


4) Turbidity measurements are commonly utilized for monitoring

1. A) planktonic cultures.
2. B) biofilms.
3. C) conies.
4. D) sessile cultures.

Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.8




5) The time between inoculation and the beginning of growth is usually called
the

1. A) lag phase.
2. B) log phase.
3. C) dormant phase.
4. D) death phase.

Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.3
6) Optical density and viable cell concentration are LEAST proportional to
each other during the

1. A) lag phase.
2. B) exponential growth phase.
3. C) stationary phase.

, 4. D) death phase.

Answer: D
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 5.8


7) When attempting to determine viable cell counts of a heat-sensitive
bacterial isolate, which cell counting method should be avoided?

1. A) spread-plate method
2. B) pour-plate method
3. C) live staining and direct counting with a microscope
4. D) both spread- and pour-plate methods

Answer: B
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 5.7


8) Bacteria that are able to grow in humans and cause disease would be
classified as

1. A) psychrophiles.
2. B) mesophiles.
3. C) thermophiles.
4. D) hyperthermophiles.

Answer: B
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 5.9


9) An agar plate for counting colonies and maximizing statistical validity
should ideally contain

1. A) 1 to 100 colonies.
2. B) 50 to 100 colonies.
3. C) 30 to 300 colonies.
4. D) 100 to 1000 colonies.

Answer: C

, Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.7




10) Relative to enzymes in mesophilic microorganisms, which of the following
is NOT characteristic of enzymes in psychrophiles?
1. A) decreased alpha helix content
2. B) decreased beta sheet content
3. C) fewer hydrogen bonds
4. D) fewer ionic bonds

Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.10
11) The number of colonies obtained in a plate count does NOT depend on
the

1. A) inoculum volume.
2. B) size of the colonies.
3. C) type of culture medium.
4. D) incubation time.

Answer: B
Bloom’s Taxonomy: 3-4: Applying/Analyzing
Chapter Section: 5.7


12) Cell density in a chemostat is controlled by

1. A) the concentration of the limiting nutrient.
2. B) the dilution factor.
3. C) the size of the initial inoculum.
4. D) the concentration of the limiting nutrient, the dilution factor, and the
size of the initial inoculum.

Answer: A
Bloom’s Taxonomy: 1-2: Remembering/Understanding
Chapter Section: 5.4