Lec 4-3 - Bacterial Growth / Energy Metabolism Flashcards Preview

Dental Microbiology > Lec 4-3 - Bacterial Growth / Energy Metabolism > Flashcards

Flashcards in Lec 4-3 - Bacterial Growth / Energy Metabolism Deck (33):
1

asexual reproduction of bacteria where they divide into two identical daughter cells

binary fission

2

incomplete septation during binary fission results in these shapes

strep, staph

3

normal pattern of bacterial growth in nature is not perfectly blank

exponential

4

phases of bacteria growth

lag, log, stationary, death

5

phase is usually due to adaptation to growth media and and is when cells are growing in volume

lag

6

phase of exponential growth at a constant rate

log phase

7

phase where equal number of cells are dying and equal number are dividing so population stays about the same

stationary phase

8

phase when cells die from toxic metabolites or starve

death phase

9

some bacteria can go into a blank state without food

dormant

10

how bacteria grow in nature and are held together by a 3 dimensional structure held together by extracellular polymeric substances

biofilms

11

dormant, tough, temporarily non reproductive structure

endospores

12

only way to kill endospores

autoclaving

13

elements required by bacteria in large amounts

macronutrients

14

elements required by bacteria in trace amounts like vitamins and minerals

micronutrients

15

bacteria capable of deriving all nutrient requirements from sources in a mixture of macro and micronutrients

prototroph

16

bacteria having complex and specialized nutrient requirements

fastidious bacteria

17

bacteria that need oxygen

obligate aerobe

18

bacteria that have optimal growth at low oxygen concentration

microaerophile

19

bacteria that grow in presence or absence of oxygen

facultative anaerobe

20

bacteria that grow only in absence of oxygen

obligat anaerobe

21

growth medium with undefined mix of nutrients with excess components for growth

complex growth medium

22

growth medium with a defined composition of nutrients with no or trace amounts of unknown components

defined growth medium

23

respiration where pyruvate is turned into inorganic compounds

anaerobic

24

respiration where pyruvate is turned into most energy and co2 and water

aerobic

25

respiration where pyruvate is turned into the least energy and organic products

fermentation

26

sum of chemical reactions in organism

metabolism

27

reactions that break organic compounds into simpler ones

catabolic reactions

28

reactions that build complex molecules from simple ones

anabolic reactions

29

this is when the end product of a metabolic pathway serves as a noncompetitive inhibitor of an enzyme early in the pathway

feedback inhibition

30

a polycistronic transcription unit containing a series of genes whose expression is coordinated by a single operator

operon

31

a set of unlinked but related operons or genes controlled by a single regulator

regulon

32

a set of unlinked operons and regulons controlled by higher order regulation of the transcription machinery usually directed at altering the global physiological state of the cell

modulon

33

enzymes are coded by blank

genes