Chapter 6

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Low O2 and high CO2 concentrations mimic conditions found in the

Intestinal tract

Candle jars increase CO2 concentrations and leave some O2 for ___ capnophiles

Aerobic

CO2 incubators or candle jars are used to grow bacteria requiring an increased ___ concentration

CO2

Capnophiles are

Bacteria requiring an increased CO2 concentration

Selective media inhibits growth of unwanted organisms via

All

Selective media allows for growth of only

Desired microbes

Different ___ are used to distinguish among different organisms

Media

Blood agar is used to identify organisms that ___ red blood cells

Lyse

Selective and different media may be combined

True

A ph indicator changes color if

Mannitol is fermented to acid

Some gram negative bacteria can't grow on lactose

True

___ is used to encourage the growth of a particular microorganism in a mixed culture

Enrichment culture

___ is a visible mass of microbial cells that theoretically arose from one cell

A colony

Pure cultures are usually obtained by the

Streak plate method

Microbes an be preserved for a long period of time via

Deep-freezing or lyophilization

Define lyophilization

A quick freeze in which a vacuum pump removes water in a process called sublimation

The normal reproductive method of bacteria is

Binary fission

A single cell divides into two identical cells

Some bacteria reproduce by

All

The time required for a cell to divide or a population to double is known as ___

The generation time

Most bacteria have a doubling time of

1-3 hours

Bacterial division occurs according to a ___

Logarithmic progression

A chemically defined medium is one in which the exact is ___

Known

Broth is good for growing ___

Large batches of organisms

Any material prepared for the growth of bacteria in a laboratory

Culture medium

Psychrophiles

Cold-loving

Mesophiles

Moderate-temperature loving

Thermophiles

Heat -loving

The requirements for microbial growth are ___

Physical and chemical

Most bacteria grow best at a pH value between ___

6.5 and 7.5

Bacteria known as ___ may grow in pH conditions as low as 1

Acidophiles

In a hypertonic solution most microbes undergo ___

Plasmolysis

___ can tolerate high salt concentrations

Halophiles

All organisms require a ___

Carbon source

What is needed for protein and nucleic acid synthesis?

Nitrogen

Nitrogen is required for protein and nucleic acid synthesis. Where can nitrogen be obtained?

The decomposition of proteins

Facultative anaerobes grow better in ___

Aerobic conditions

Facultative anaerobes can grow in ___ conditions

Aerobic or anaerobic

E. coli are considered facultative aerobes

True

___ don't use 02 but tolerate it

Aerotolerant anaerobes

Many ___ ferment carbohydrate to lactate

Aerotolerant anaerobes

Aerotolerant anaerobes fermenting carbohydrate to lactate will ___ the growth of aerobes

Inhibit

___ are sensitive to oxygen-derived free radicals

Microaerophilic aerobes

Only aerobic growth; oxygen required

Obligate aerobes

Common solidifying agent for a culture medium

Agar

The exact chemical composition varies batch to batch

Complex medium

A bacterial respiratory enzyme that can be put in media

Oxyrase

Some parasitic and fastidious bacteria must be cultured in living animals or cell walls because

Won't grow on artificial media

Media type for growth of chemoautotrophs and photoautotrophs

Chemically defined

Media type for growth of most chemoorganismsheterotrophic

Complex

Media type for growth of obligate anaerobes

Reducing

Media type for suppression of unwanted microbes; encouraging desired microbes

Selective

Media type for differentiation of colonies of desired microbes from others

Differential

Media type designed to increase numbers of desired microbes to detectable levels

Enrichment

During this phase of growth there is little to no change in the number of cells but metabolic activity is high

Lag phase

During this growth phase the bacteria multiply at the fastest rate possible under conditions provided

Log phase

During this phase of growth there is an equilibrium between cell division and death

Stationary phase

During this phase of growth the number of deaths exceeds the number of cells formed

Death phase

DNA and enzyme synthesis occurs during the ___ phase of growth

Lag

pH increases as nutrients are exhausted and waste products build up during the ___ phase

Death phase

Why are plate counts reported as the number of colony forming units (CFU) instead of the number of cells?

Because its impossible to say that each colony actually arose from an individual cell

What happens if the concentration of bacteria on a plate is too great?

The colonies will grow into each other and the plate will be uncountable

To ensure a countable plate a series of ___ should be plated

Dilutions

In ___ bacteria are retained on the surface of a membrane filter and then transferred to a culture medium to grow and subsequently be counted

Filtration

What is used to determine turbidity by measuring the amount of light that passed through a suspension of cells?

Spectophotrometer

An indirect way of estimating bacterial numbers is ___

Measuring the metabolic activity of the population

What is a convenient method of growth measurement for filamentous organisms such as fungi?

Measuring dry weight

211 exam 2 ch18 part 1

eiren · 100問 · 1年前

211 exam 2 ch18 part 1

100問 • 1年前

eiren

211 exam 2 ch18 part 2

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211 exam 2 ch18 part 2

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211 exam 2 ch19 part 1

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211 exam 2 ch19 part 1

The cardiac cycle

The cardiac cycle

211 exam 2 ch22

211 exam 2 ch22

211 lab quiz 4

211 lab quiz 4

211 exam 3 ch 24

211 exam 3 ch 24

211 lab quiz 4 cat anatomy

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211 lab quiz 4 cat anatomy

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211 lab quiz 4 reproductive anatomy extra

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211 lab quiz 4 reproductive anatomy extra

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211 lab quiz 4 urinalysis

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211 lab quiz 4 urinalysis

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211 lab quiz 4 urinary system

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211 lab quiz 4 urinary system

Urinary system

Urinary system

211 exam 3 ch 23

211 exam 3 ch 23

211 exam 3 ch 25

211 exam 3 ch 25

211 exam 3 ch 26

211 exam 3 ch 26

211 lab quiz 3 terms

211 lab quiz 3 terms

General practice quiz

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General practice quiz

Quiz 5 histology

Quiz 5 histology

Hormones

Hormones

Diabetes

Diabetes

Reproductive system

Reproductive system

Endocrine system

Endocrine system

Blood

Blood

Lymphatic system

Lymphatic system

Cardiovascular system

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Cardiovascular system

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Cardiovascular system; Blood vessels

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Cardiovascular system; Blood vessels

Respiratory system

Respiratory system

Urinary System

Urinary System

Digestive system

Digestive system

Reproductive system

Reproductive system

Terminology

Terminology

Ch 1

Ch 1

Mini practical

Mini practical

Chapter 2

Chapter 2

Chapter 4

Chapter 4

Chapter 7

Chapter 7

Chapter l

Chapter l

Chapter 2

Chapter 2

Chapter 4

Chapter 4

Chapter 5 Microbial Metabolism

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Chapter 5 Microbial Metabolism

33問 • 1年前

eiren

Chapter 5 Microbial Metabolism

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Chapter 5 Microbial Metabolism

Mini practical 2

Mini practical 2

Skills 8

Skills 8

Chapter 6 Microbial Growth

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Chapter 6 Microbial Growth

Skills 7

Skills 7

Chapter 7 Control Of Microbial Growth

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Chapter 7 Control Of Microbial Growth

Skills 5

Skills 5

Chapter 8 Microbial Genetics

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Chapter 8 Microbial Genetics

Skills 4

Skills 4

Skills 6

Skills 6

Chapter 9

Chapter 9

Chapter 10

Chapter 10

Chapter 11

Chapter 11

Chapter 13

Chapter 13

Chapter 12 Fungi, Algae, Protozoa, Multicellular Parasites

eiren · 65問 · 1年前

Chapter 12 Fungi, Algae, Protozoa, Multicellular Parasites

65問 • 1年前

eiren

問題一覧

Low O2 and high CO2 concentrations mimic conditions found in the

Intestinal tract

Candle jars increase CO2 concentrations and leave some O2 for ___ capnophiles

Aerobic

CO2 incubators or candle jars are used to grow bacteria requiring an increased ___ concentration

CO2

Capnophiles are

Bacteria requiring an increased CO2 concentration

Selective media inhibits growth of unwanted organisms via

All

Selective media allows for growth of only

Desired microbes

Different ___ are used to distinguish among different organisms

Media

Blood agar is used to identify organisms that ___ red blood cells

Lyse

Selective and different media may be combined

True

A ph indicator changes color if

Mannitol is fermented to acid

Some gram negative bacteria can't grow on lactose

True

___ is used to encourage the growth of a particular microorganism in a mixed culture

Enrichment culture

___ is a visible mass of microbial cells that theoretically arose from one cell

A colony

Pure cultures are usually obtained by the

Streak plate method

Microbes an be preserved for a long period of time via

Deep-freezing or lyophilization

Define lyophilization

A quick freeze in which a vacuum pump removes water in a process called sublimation

The normal reproductive method of bacteria is

Binary fission

A single cell divides into two identical cells

Some bacteria reproduce by

All

The time required for a cell to divide or a population to double is known as ___

The generation time

Most bacteria have a doubling time of

1-3 hours

Bacterial division occurs according to a ___

Logarithmic progression

A chemically defined medium is one in which the exact is ___

Known

Broth is good for growing ___

Large batches of organisms

Any material prepared for the growth of bacteria in a laboratory

Culture medium

Psychrophiles

Cold-loving

Mesophiles

Moderate-temperature loving

Thermophiles

Heat -loving

The requirements for microbial growth are ___

Physical and chemical

Most bacteria grow best at a pH value between ___

6.5 and 7.5

Bacteria known as ___ may grow in pH conditions as low as 1

Acidophiles

In a hypertonic solution most microbes undergo ___

Plasmolysis

___ can tolerate high salt concentrations

Halophiles

All organisms require a ___

Carbon source

What is needed for protein and nucleic acid synthesis?

Nitrogen

Nitrogen is required for protein and nucleic acid synthesis. Where can nitrogen be obtained?

The decomposition of proteins

Facultative anaerobes grow better in ___

Aerobic conditions

Facultative anaerobes can grow in ___ conditions

Aerobic or anaerobic

E. coli are considered facultative aerobes

True

___ don't use 02 but tolerate it

Aerotolerant anaerobes

Many ___ ferment carbohydrate to lactate

Aerotolerant anaerobes

Aerotolerant anaerobes fermenting carbohydrate to lactate will ___ the growth of aerobes

Inhibit

___ are sensitive to oxygen-derived free radicals

Microaerophilic aerobes

Only aerobic growth; oxygen required

Obligate aerobes

Common solidifying agent for a culture medium

Agar

The exact chemical composition varies batch to batch

Complex medium

A bacterial respiratory enzyme that can be put in media

Oxyrase

Some parasitic and fastidious bacteria must be cultured in living animals or cell walls because

Won't grow on artificial media

Media type for growth of chemoautotrophs and photoautotrophs

Chemically defined

Media type for growth of most chemoorganismsheterotrophic

Complex

Media type for growth of obligate anaerobes

Reducing

Media type for suppression of unwanted microbes; encouraging desired microbes

Selective

Media type for differentiation of colonies of desired microbes from others

Differential

Media type designed to increase numbers of desired microbes to detectable levels

Enrichment

During this phase of growth there is little to no change in the number of cells but metabolic activity is high

Lag phase

During this growth phase the bacteria multiply at the fastest rate possible under conditions provided

Log phase

During this phase of growth there is an equilibrium between cell division and death

Stationary phase

During this phase of growth the number of deaths exceeds the number of cells formed

Death phase

DNA and enzyme synthesis occurs during the ___ phase of growth

Lag

pH increases as nutrients are exhausted and waste products build up during the ___ phase

Death phase

Why are plate counts reported as the number of colony forming units (CFU) instead of the number of cells?

Because its impossible to say that each colony actually arose from an individual cell

What happens if the concentration of bacteria on a plate is too great?

The colonies will grow into each other and the plate will be uncountable

To ensure a countable plate a series of ___ should be plated

Dilutions

In ___ bacteria are retained on the surface of a membrane filter and then transferred to a culture medium to grow and subsequently be counted

Filtration

What is used to determine turbidity by measuring the amount of light that passed through a suspension of cells?

Spectophotrometer

An indirect way of estimating bacterial numbers is ___

Measuring the metabolic activity of the population

What is a convenient method of growth measurement for filamentous organisms such as fungi?

Measuring dry weight