Navigation » List of Schools » East Los Angeles College » Microbiology » Microbiology 020 – General Microbiology » Fall 2021 » Microbial Nutrition and Growth 1
Below are the questions for the exam with the choices of answers:
Question #1
A the low temperature where microbes stop multiplying and the high temperature where they stop multiplying
B the low temperature where they physically die and the high temperature where they stop multiplying
C the low temperature where microbes physically die and the high temperature where they physically die
D the low temperature where microbes stop multiplying and the high temperature where they physically die
Question #2
A pH
B nutrients
C oxygen
D temperature
Question #3
A is remarkably stable, showing little change
B can be as short as 30 minutes
C increase over that seen in unfavourable conditions
D can be as short as 12 hours
Question #4
A Food stored at 60°F
B Food frozen to 0°C
C Food stored in a refrigerator
D Chicken cooked to 170°F
Question #5
A Cells survive but do not divide at temperatures below the minimum.
B Cells begin to rapidly die at a temperature just below the optimum.
C Cells divide more rapidly as the temperature decreases below the optimum.
Question #6
A Cells begin to die at a temperature slightly above the maximum.
B Cells divide more rapidly as the temperature increases above the optimum.
C Cells survive but do not divide at temperatures above the maximum.
D Cells gradually die as temperatures rise above the minimum.
Question #7
A alkalinophiles
B neutrophiles
C acidophiles
Question #8
A aerobes
B methanogens
C capnophiles
D anaerobes
Question #9
A 32
B 6
C 64
D 12
Question #10
A sexual reproduction
B budding
C endospores
D binary fission
Question #11
A the buildup of oxidative by-products such as O- in the food
B toxins produced by microbes as they grow in the food
C growth of the microbe in the intestinal tract and intestinal lining
D toxins produced by the microbe in the intestinal tract
Question #12
A grow at different temperatures based on the availability of oxygen
B grow best at an optimum temperature and a range above and below it
C grow at different temperatures based on the availability of nutrients
D can grow at a broad range of temperatures from -5°C to 80°C
Question #13
A All of the choices are correct.
B beneficia
C neutral
D harmful
Question #14
A between 1.5 and 2 billion
B several million
C several thousand
D roughly 100,000
Question #15
A TRUE
B FALSE
Question #16
A FALSE
B TRUE
Question #17
A budding
B sexual reproduction
C fragmentation
D binary fission
Question #18
A FALSE
B TRUE
Question #19
A DNA polymerase
B Gyrase
C RNA polymerase
D Helicase
Question #20
A the hydrolysis of gyrase
B the hydrolysis of ATP
C the hydrolysis of GTP
D the synthesis of G
Question #21
A All of the choices are correct.
B septum
C replicated DNA
D ribosomes
Question #22
A TRUE
B FALSE
Question #23
A translate
B transcribe
C replicate
D hydrolyze
Question #24
A TRUE
B FALSE
Question #25
A An automated cell-counting device that requires fluorescent labeling of cells that will be scanned and counted
B An automated cell-counting device that scans a culture as it passes through a tiny pipette
C An automated cell-counting device that scans a culture as it passes through a tiny pipette
Question #26
A This method uses a special slide (cytometer) and cells are counted by observing them through a microscope
B An automated cell-counting device that scans a culture as it passes through a tiny pipette
C A spectrophotometer is used to measure the light scattering properties of a bacterial culture. As the number of bacteria increase, more light is scattered and less is transmitted to the detector
Question #27
A A spectrophotometer is used to measure the light scattering properties of a bacterial culture. As the number of bacteria increase, more light is scattered and less is transmitted to the detector
B This method uses a special slide (cytometer) and cells are counted by observing them through a microscope
C This method uses a special slide (cytometer) and cells are counted by observing them through a microscope
Question #28
A A spectrophotometer is used to measure the light scattering properties of a bacterial culture. As the number of bacteria increase, more light is scattered and less is transmitted to the detector
B This method uses a special slide (cytometer) and cells are counted by observing them through a microscope
C An automated cell-counting device that requires fluorescent labeling of cells that will be scanned and counted
Question #29
A Adjustment period during which cells are dividing slowly while they adjust to growth conditions
B Phase during which cells are growing very quickly, at their maximum rate of cell division
C Nutrient depletion and waste accumulation prevent cell growth and cells die exponentially
Question #30
A Adjustment period during which cells are dividing slowly while they adjust to growth conditions
B Nutrient depletion and waste accumulation prevent cell growth and cells die exponentially
C Phase during which cells are growing very quickly, at their maximum rate of cell division
Question #31
A Phase during which cells are growing very quickly, at their maximum rate of cell division
B Phase during which nutrient depletion and accumulation of wastes begin to slow cell growth such that the rate of cell increase equals the rate of cell death
C Adjustment period during which cells are dividing slowly while they adjust to growth conditions
Question #32
A Phase during which nutrient depletion and accumulation of wastes begin to slow cell growth such that the rate of cell increase equals the rate of cell death
B Phase during which cells are growing very quickly, at their maximum rate of cell division
C Adjustment period during which cells are dividing slowly while they adjust to growth conditions
Question #33
A Describes an organism that requires oxygen for growth and has the enzymes to remove toxic by-products of oxygen metabolism
B Describes an organism that does not use oxygen, but can grow to a limited extent in the presence of oxygen
C Describes an organism that is unable to use oxygen and lacks the enzymes to detoxify oxygen, thus requiring the absence of oxygen for growth
Question #34
A Describes an organism that requires oxygen for growth and has the enzymes to remove toxic by-products of oxygen metabolism
B Describes an organism that cannot grow at normal atmospheric oxygen concentrations, but does require a small amount of oxygen for growth
C Describes an organism that is unable to use oxygen and lacks the enzymes to detoxify oxygen, thus requiring the absence of oxygen for growth
Question #35
A Describes an organism that can grow in the presence of oxygen and can detoxify it, but can also grow in the absence of oxygen
B Describes an organism that requires oxygen for growth and has the enzymes to remove toxic by-products of oxygen metabolism
C Describes an organism that cannot grow at normal atmospheric oxygen concentrations, but does require a small amount of oxygen for growth
Question #36
A Describes an organism that cannot grow at normal atmospheric oxygen concentrations, but does require a small amount of oxygen for growth
B Describes an organism that can grow in the presence of oxygen and can detoxify it, but can also grow in the absence of oxygen
C Describes an organism that requires oxygen for growth and has the enzymes to remove toxic by-products of oxygen metabolism
Question #37
A Describes an organism that does not use oxygen, but can grow to a limited extent in the presence of oxygen
B Describes an organism that requires oxygen for growth and has the enzymes to remove toxic by-products of oxygen metabolism
C Describes an organism that is unable to use oxygen and lacks the enzymes to detoxify oxygen, thus requiring the absence of oxygen for growth
Question #38
A Describes an organism that grows optimally at temperatures ranging from 80°C to 120°C
B Describes an organism that grows optimally at temperatures ranging from 0°C to 15°C
C Describes an organism that grows optimally at temperatures ranging from 45°C to 80°C
Question #39
A Describes an organism that grows optimally at temperatures ranging from 0°C to 15°C
B Describes an organism that grows optimally at temperatures ranging from 20°C to 40°C
C Describes an organism that grows optimally at temperatures ranging from 45°C to 80°C
Question #40
A Describes an organism that has an optimum growth temperature between 15°C and 30°C, but is able to grow slowly at colder temperatures
B Describes an organism that grows optimally at temperatures ranging from 0°C to 15°C
C Describes an organism that grows optimally at temperatures ranging from 20°C to 40°C
Question #41
A Describes an organism that grows optimally at temperatures ranging from 0°C to 15°C
B Describes an organism that has an optimum growth temperature between 15°C and 30°C, but is able to grow slowly at colder temperatures
C Describes an organism that grows optimally at temperatures ranging from 20°C to 40°C
Question #42
A Describes an organism that has an optimum growth temperature between 15°C and 30°C, but is able to grow slowly at colder temperatures
B Describes an organism that grows optimally at temperatures ranging from 80°C to 120°C
C Describes an organism that grows optimally at temperatures ranging from 0°C to 15°C
Question #43
A A cell in this environment will swell as water moves in by osmosis, and may lyse if it does not have a cell wall.
B A cell in this environment will lose water and shrink as water moves out of the cell by osmosis.
C A cell in this environment will neither shrink nor swell as there is no net movement of water into or out of the cell by osmosis.
Question #44
A A cell in this environment will neither shrink nor swell as there is no net movement of water into or out of the cell by osmosis.
B A cell in this environment will lose water and shrink as water moves out of the cell by osmosis.
C A cell in this environment will swell as water moves in by osmosis, and may lyse if it does not have a cell wall.
Question #45
A A cell in this environment will swell as water moves in by osmosis, and may lyse if it does not have a cell wall.
B A cell in this environment will lose water and shrink as water moves out of the cell by osmosis.
C A cell in this environment will neither shrink nor swell as there is no net movement of water into or out of the cell by osmosis.
Question #46
A A fundamental component of organic molecules consumed by and produced by the cell
B A cell is unable to produce ATP and its cell membrane has lost its integrity because of a deficiency of this nutrient
C A cell requires this nutrient for pH maintenance and the bonds between DNA strands
Question #47
A A cell requires this nutrient for pH maintenance and the bonds between DNA strands
B A fundamental component of organic molecules consumed by and produced by the cell
C A cell is unable to produce ATP and its cell membrane has lost its integrity because of a deficiency of this nutrient
Question #48
A This nutrient is a major part of all organic compounds in the cell as well as water, the major component of the cell
B A fundamental component of organic molecules consumed by and produced by the cell
C A cell requires this nutrient for pH maintenance and the bonds between DNA strands
Question #49
A A cell’s proteins are misshapen or unstable because of its lack of the amino acids cysteine and methionine (composed in part by this nutrient)
B This nutrient is a major part of all organic compounds in the cell as well as water, the major component of the cell
C A fundamental component of organic molecules consumed by and produced by the cell
Question #50
A A fundamental component of organic molecules consumed by and produced by the cell
B A cell is unable to synthesize proteins and nucleic acids due to a deficiency in this essential nutrient required for their structure
C A cell is unable to produce ATP and its cell membrane has lost its integrity because of a deficiency of this nutrient
Question #51
A A cell is unable to synthesize proteins and nucleic acids due to a deficiency in this essential nutrient required for their structure
B A cell is unable to produce ATP and its cell membrane has lost its integrity because of a deficiency of this nutrient
C This nutrient is a major part of all organic compounds in the cell as well as water, the major component of the cell
Question #52
A Thermophilic only
B Chemoautotrophic only
C Chemoheterotrophic only
D Chemoautotrophic, Thermophilic, Chemoheterotrophic