Flashcards in Ch 4 - Nutrition, Culture, and Metabolism of Microorganisms Deck (51)
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1
The sum total of all chemical reactions that occur in a cell
metabolism
2
Energy-releasing metabolic reactions
catabolic reactions
3
Energy-requiring metabolic reactions
anabolic reactions
4
iron under anoxic conditions, exist in which form (Fe2+/Fe3+) and (soluble/insoluble).
Fe2+ and soluble
5
iron under oxic conditions, exist in which form (Fe2+/Fe3+) and (soluble/insoluble).
Fe3+ and insoluble
6
these iron-binding agents obtain iron from insoluble mineral form
siderophores
7
a culture media where precise chemical composition is known
Defined media
8
a culture media composed of digests of chemically undefined substances
complex media
9
culture containing only a single kind of microbe
pure culture
10
unwanted organisms in a culture
contaminants
11
unit of measurement for energy
kJ
12
energy released that is available to do work
free energy
13
change in free energy during a reaction
delta G0′
14
Reactions with a negative delta G0′ release/require free energy
release
15
Reactions with a positive delta G0′ release/require energy
require
16
Reactions with a negative delta G0′ release free energy
exergonic
17
Reactions with a positive delta G0′ require energy
endergonic
18
free energy that occurs under actual conditions
delta G
19
delta G =
delta G0′ + RT ln K
20
energy required to bring all molecules in a chemical reaction into the reactive state
activation energy
21
substance that Lowers the activation energy of a reaction
catalyst
22
substance that Increases reaction rate
catalyst
23
Are enzymes generally larger or smaller than the substrate?
larger
24
region of enzyme that binds substrate
ACTIVE SITE
25
cleaves peptidoglycan
lysozyme
26
non protein molecules that bind tightly to enzymes
prosthetic group
27
non protein molecules bound loosely to enzymes
coenzymes
28
redox reactions occur in two ____ ______.
half reactions
29
the substance oxidized in a redox reaction
electron donor
30
