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Micro > Chapter 6- Microbial Growth > Flashcards

Chapter 6- Microbial Growth Flashcards

0
Q

Microbial growth Cells can be ____ from colonies

A

Isolated

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1
Q

Increase number of cells but not size

A

Microbial growth

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2
Q

Microbial growth is ____ on the growth conditions

A

dependant

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3
Q

Requirements for growth

A

Physical, chemical

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4
Q

Physical requirements for growth

A

Temp, pH, osmotic pressure

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5
Q

Chemical requirements for growth

A

Carbon, nitrogen, sulfur, phosphorus, trace elements, O2, organic growth factor

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6
Q

Room temp

A

Mesophiles

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7
Q

Below 0

A

Psychrophiles

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8
Q

0-30

A

Psychrotrophs

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9
Q

40-70

A

Thermophiles

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10
Q

70 and above

A

Hyperthermophiles

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11
Q

Hypertonic environments or an increase in salt or sugar cause

A

Plasmolysis

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12
Q

Hypotonic environments cause

A

Cell rupture

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13
Q

Backbone of organic molecules

A

Carbon

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14
Q

Primary component or proteins

A

Nitrogen

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15
Q

Protein component

A

Sulfur

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16
Q

In DNA, RNA, ATP, and membranes

A

Phosphorus

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17
Q

Organic compounds obtained from the environment

Vitamins, amino acids, purines, and pyrimidines

A

Organic growth factors

18
Q

In plaque on teeth

A

Biofilms

19
Q

Microbial communities
Form slime or hydrogels
Share nutrients
Sheltered from harmful factors

A

Biofilms

20
Q

Bacteria is attracted by chemicals via

A

Quorum sensing

21
Q

How do eukaryotes grow

A

Mitosis, meiosis, and binary fission

22
Q

How do bacteria and archaea grow

A

Binary fission

23
Q

Cell elongation and DNA replication
CW/ plasma membrane constriction
Cross wall formation(separate/isolate DNA)
Cell separation

A

Binary fission

24
Q

Nutrients prepare for microbial growth

A

Culture medium

25
Q

No living microbes

A

Sterile

26
Q

Introduction of microbes into medium

A

Inoculum

27
Q

Microbes growling in/on culture medium

A

Culture

28
Q

Complex polysaccharide
Used as solidifying agent for culture media
Generally not metabolized by microbes
Liquefies at 100C and solidifies at 40C

A

Agar

29
Q

Exact chemical composition

A

Chemically defined media

30
Q

Extant ya an digests of yeasts, meat, or plants

A

Complex media

31
Q

Contain chemicals that combine O2
Heated to drive off O2
Anaerobic

A

Reducing media

32
Q

Make it easy to distinguish colonies or different microbes

A

Differential media

33
Q

Suppress some unwanted microbes and encourage desired microbes

A

Selective media

34
Q

A pure culture contains only ____ species or strain

A

One

35
Q

A ___ is a population of cells arising from a single cell or spire or from a group of attached cells

A

Colony

36
Q

A colony is often called a

A

Colony forming unit

37
Q

The _____ is used to isolate pure cultures

A

Streak plate method

38
Q

Binary fission
Budding
Conidiospores
Fragmentation

A

Reproduction in prokaryotes

39
Q

Bacterial growth curve order

A

Lag
Log
Stationary
Death

40
Q

Intense activity preparing for population growth but no increase in population

A

Lag phase

41
Q

Exponential increase in population

A

Log phase

42
Q

Period of equilibrium-microbial deaths balance production of new cells

A

Stationary phase

43
Q

Population is decreasing at a logarithmic rate

A

Death phase

Micro (10 decks)

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