Section 2

Front 1

A bacterium that grows better in the presence of oxygen when it is available, but can also grow if oxygen is absent, is called...

Back 1

A FACULTATIVE ANAEROBE

Front 2

Organisms that obtain their carbon and energy from existing organic compounds are called...

Back 2

CHEMOORGANOHETEROPHS

Front 3

Cobalt, zinc, copper and manganese are examples of _________________________.

Back 3

TRACE ELEMENTS

Front 4

Oranges have a pH of 5. A scientist isolates several types of bacteria that cause spoilage of orange juice concentrates. Which growth condition would be most appropriate to maintain these bacteria in culture?

Back 4

ACIDIC CONDITIONS

Front 5

Organisms that require organic compounds for a carbon and energy source are called...

Back 5

CHEMOLITHOAUTOTROPHS

Front 6

A method that counts only live microbes.

Back 6

PLATE COUNT METHOD

Front 7

The growth phase in which cells are adapting to new growth conditions is termed?

Back 7

LAG PHASE

Front 8

A type of microorganism that grows in the presence of oxygen when it is available but can also grow without oxygen is

Back 8

FACULTATIVE ANAEROBES

Front 9

During which phase(s) of culture growth are the number of newly formed cells approximately equal to the number of dying cells?

Back 9

STATIONARY PHASE

Front 10

While many microbes are inhibited by high concentrations of salt, some can withstand or even require it. Which term would best be used to describe organisms that require approximately 2% of sodium chloride.

Back 10

HALOTOLERANT

Front 11

A bacterial culture maintained under complete anaerobic conditions accidentally develops a leak allowing oxygen into the chamber. However, the bacteria continue to grow. The bacteria are most likely...

Back 11

AEROTOLERANT ANAEROBES

Front 12

Tomato sauce has a pH of 5. A scientist isolates several types of bacteria that cause spoilage of tomato sauce. Which growth condition would be most appropriate to maintain these bacteria in culture?

Back 12

ACIDIC CONDITIONS

Front 13

Bacteria that acquire energy by oxidizing inorganic, mineral compounds are called...

Back 13

CHEMOLITHOAUTOTROPHS

Front 14

TRUE OR FALSE

Cyanobacteria are photosynthetic

Back 14

TRUE

Front 15

TRUE OR FALSE

Cyanobacteria have the important ability to carry out the process of nitrogen fixation.

Back 15

TRUE

Front 16

TRUE OR FALSE

Cyanobacteria are found only in both fresh water and marine environments.

Back 16

TRUE

Front 17

TRUE OR FALSE

Cyanobacteria have many shapes ranging from unicellular cocci and bacilli to filaments of many cells.

Back 17

TRUE

Front 18

A dormant structure stage that allows some soil dwelling bacteria to survive unfavorable conditions such as desiccation and radiation is called a(n)...

Back 18

ENDOSPORE

Front 19

Bacteria that have a corkscrew cell shape and are motile by means of multiple axial filaments covered by an outer sheath are called...

Back 19

SPIROCHETES

Front 20

TRUE OR FALSE

Lactic acid bacteria possess the enzyme catalase

Back 20

FALSE

Front 21

Which genus contains species that are often club-shaped and are sometimes called diphtheroids?

Back 21

CORYNEBACTERIUM

Front 22

A resting stage that allows some species of Bacillus and Clostridium to survive in unfavorable conditions and has also been used as an agent in bioterrorism is called a(n)...

Back 22

ENDOSPORE

Front 23

This bacteria can degrade many compounds that most other microbes are unable to break down? These bacteria are also opportunistic pathogens that can grow in respirators and water.

Back 23

PSEUDOMONAS

Front 24

A scientist wishes to find an enzyme that can degrade carbohydrates under boiling water conditions. What kind of microorganism should they select to search out this type of enzyme?

Back 24

AN EXTREME THERMOPHILE

Front 25

Bacteria multiply through the process of...

Back 25

BINARY FISSION

Front 26

TRUE OR FALSE

After bacteria divide the daughter cells are genetically identical.

Back 26

TRUE

Front 27

TRUE OR FALSE

To look at the number of living cells in a sample you could choose a turbidity measurement or take a direct microscope count.

Back 27

FALSE

Front 28

Phases of a bacterial growth: Step 1

Back 28

LAG PHASE

Front 29

Phases of a bacterial growth: Step 2

Back 29

EXPONENTIAL PHASE

Front 30

Phases of a bacterial growth: Step 3

Back 30

STATIONARY PHASE

Front 31

Phases of a bacterial growth: Step 4

Back 31

DEATH PHASE

Front 32

Extremophiles come mostly from what Domain?

Back 32

ARCHAEA

Front 33

TRUE OR FALSE

A halophile requires high salt

Back 33

TRUE

Front 34

TRUE OR FALSE

Oxygenic microbes such as Cyanobacteria, produce oxygen gas.

Back 34

TRUE

Front 35

If an organism grows best at 26°C and pH 2, the organism is a:

Back 35

MESOPHILE AND ACIDOPHILE

Front 36

A/an ______________ requires O2 for growth

Back 36

OBLIGATE AEROBE

Front 37

A/an __________________ does not require O2 but prefers it

Back 37

FACULTATIVE ANAEROBE

Front 38

The temperature where the metabolism is functioning at its best is referred to as...

Back 38

TEMPERATURE OPTIMUM

Front 39

Using a flow cytometer, a grad student, Lee Gionella, determines that at the time of sampling the cells are multiplying rapidly, are storing nutrients, and are highly active metabolically. What stage in the growth curve is being observed?

Back 39

EXPOTENTIAL PHASE

Front 40

The amount of time required for a parent cell to create a daughter cell is called?

Back 40

GENERATION TIME

Front 41

The enzyme responsible for detoxifying the oxygen free radicals resulting in the production of H2O2 is...

Back 41

SUPEROXIDE DISMUTASE

Front 42

If a culture starts with 4,000 cells, after three generations how many cells will there be?

Back 42

???

Front 43

You are walking near a swamp and notice a strong smell of sulfur. The smell is most likely produced by a(n)...

Back 43

AEROBIC CHEMOLITHOTROPH

Front 44

A microorganism isolated from the Arctic region would most likely be a(n)...

Back 44

PSYCHROPHILE