UNIT 2 CULTURE MEDIA Flashcards

1
Q

the study of microorganisms such as
bacteria, protozoa, fungi and similar organisms that
can’t be seen with the naked eye.

A

Microbiology

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2
Q

The need to study
these minute organisms started when scientists
discovered the association of microbes to specific

A

Diseases

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3
Q

increase in cell number through binary fission

A

Microbial Growth

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4
Q

cell simply splits into two cells, producing two identical cells

A

Binary Fission

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5
Q

time required for a cell to divide, and its population to double

A

Generation Time

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6
Q

cells form an initial outgrowth (a bud) that enlarges its size until it approaches that of a parent cell, and
then it separates

A

Budding

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7
Q

microbes that grow and multiply in or on a culture medium

A

Culture

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8
Q

a group of descendants of an original cell

A

Colony

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9
Q

aka axenic; contains a single microbial species

A

Pure Culture

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10
Q

PSYCHROPHILES

A

− sensitive to
temperatures over
20˚C
− optimum growth at
15˚C or below

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11
Q

− sensitive to
temperatures over
20˚C
− optimum growth at
15˚C or below

A

PSYCHROPHILES

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12
Q

PSYCHROTROPHS

A

optimum growth at
20˚C to 30˚C

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13
Q

optimum growth at
20˚C to 30˚C

A

PSYCHROTROPHS

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14
Q

MESOPHILES

A

optimum growth at
25˚C to 40˚C

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15
Q

optimum growth at
25˚C to 40˚C

A

MESOPHILES

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16
Q

THERMOPHILES

A

optimum growth at
50˚C to 60˚C

17
Q

optimum growth at
50˚C to 60˚C

A

THERMOPHILES

18
Q

Extreme
Thermophiles

A

grow at 80˚C or
higher

19
Q

ACIDOPHILES

A

− grow at very low pH (0.1 to
5.4)
− Lactobacillus acidophilus

20
Q

NEUTROPHILES

A

grow at pH 5.4 to 8.5

Lye water

21
Q

− grow at very low pH (0.1 to
5.4)
− Lactobacillus acidophilus

A

ACIDOPHILES

22
Q

grow at pH 5.4 to 8.5

Lye water

A

NEUTROPHILES

23
Q

ALKALIPHILES

A

− grow at high pH (7 to 12)
− Vibrio cholerae

24
Q

require very high salt conc. 20 to 30%

aka extreme halophiles

A

OBLIGATE HALOPHILES

25
OBLIGATE HALOPHILES
require very high salt conc. 20 to 30% aka extreme halophiles
26
do not require high salt conc. for growth − tolerates 2-15% salt concentration
FACULTATIVE HALOPHILES
27
FACULTATIVE HALOPHILES
do not require high salt conc. for growth − tolerates 2-15% salt concentration
28
− organisms which derive energy from organic carbon sources − may need to consume other living organisms to live
CHEMOHETEROTROPHS
29
CHEMOHETEROTROPHS
− organisms which derive energy from organic carbon sources − may need to consume other living organisms to live
30
CHEMOAUTOTROPHS
organisms which use inorganic energy sources to synthesize organic compounds − primary carbon source is carbon dioxide
31
NITROGEN
− makes up 14% of dry cell weight − Sources: proteins, ammonium, nitrogen gas, nitrates
32
UUL DANCE TROOP
used to form proteins and some vitamins − Sources: proteins, hydrogen sulfide, sulfates
33
used to form proteins and some vitamins − Sources: proteins, hydrogen sulfide, sulfates
SULFUR