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Microbiology Exam One > Microbial Growth > Flashcards

Microbial Growth Flashcards

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Biology 101 flashcards
0
Q

What is a colony of microbes?

A

Aggregation of cells arising from a single parent cell

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1
Q

What does “growth” mean in regards to microbes?

A

Increase in the size of a population of microbes

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2
Q

What is a biofilm of microbes?

A

Collection of microbes in a complex community

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3
Q

What is the most famous biofilm?

A

Plaque found in teeth

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4
Q

What is the carbon source for autotrophs?

A

Carbon dioxide

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5
Q

What is the carbon source for heterotrophs?

A

Organic compounds

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6
Q

What is the energy source of plants, some protozoa, algae, bacteria, and archaea?

A

Light (photoautotrophs)

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7
Q

What is the energy source for animals and fungi?

A

Chemical compounds (chemoheterotrophs)

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8
Q

What is the most important factor in determining the growth of microorganisms?

A

Temperature

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9
Q

What is the word used for a microbe that prefers cold temperatures?

A

Psychrophilic

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10
Q

What is the term for microbes that prefer moderate temperatures?

A

Mesophilic

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11
Q

What is the term for microbes that prefer severely high temperatures?

A

Hyperthermophilic

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12
Q

Most microbes prefer what type of temperature environment?

A

Moderate temperatures (mesophilic)

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13
Q

Most microorganisms thrive in what pH range?

A

6-9

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14
Q

Most animal pathogens work best at what pH level?

A

7

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15
Q

Why is water/moisture important for the growth of microorganisms?

A

Used as building material for cell synthesis, food and water transport

16
Q

What group of bacteria do not have typical peptidoglycan cell walls and are at risk for hypotonic environment bursting?

A

Mycobacteria

17
Q

What effect does light have on most pathogens?

A

Most are killed by direct sunlight and UV rays

18
Q

What is the term for a sample of specimens for the purpose of cultural microorganisms?

A

Inoculum

19
Q

What is the collection of nutrients used to grow culture on called?

A

Medium

20
Q

What is the name of the type of media used when the exact chemical composition is known to attract a specific bacteria?

A

Defined (synthetic)

21
Q

What type of media is used when the exact chemical composition is unknown that can attract a certain bacteria?

A

Complex (like blood, milk, yeast, etc.)

22
Q

What is the most famous selective media?

A

Sabouraud dextrose agar

23
Q

What effect does sabouraud dextrose agar have on bacteria and fungi?

A

Inhibits bacteria, selects for fungi

Microbiology Exam One (9 decks)

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