BACTERIAL GROWTH REQUIREMENTS

Question 1

Orderly and organized increase in the sum of all components of the organism

Answer 1

BACTERIAL GROWTH

Question 2

replication of bacterium into two daughter cells through ____ including structures, organelles and components

Answer 2

binary fission

Question 3

t or f

Bacteria doesn’t grow in very diverse conditions, which explains why they are not found everywhere

Answer 3

f

Question 4

certain conditions promote bacterial growth such as ___, ___, __ and __.

Answer 4

temperature, moisture, pH and environmental oxygen.

Question 5

If thebacteriagrow for six hours, eachbacterium will divide ___ times per hour ×6 hours = 18 times.

Answer 5

3

Question 6

T OR F

Every time the bacteriareproduce, the number doubles.

Answer 6

T

Question 7

NUTRIENT REQS OF BACTERIA

Answer 7

Water, carbon source, nitrogen source, inorganic salts, growth factors, sulfur source, phosphorus source

Question 8

structural backbone of all organic molecules

Answer 8

Carbon

Question 9

depend on inorganic compounds (C02) as carbon source

Answer 9

autotrophs

Question 10

depends on organic substances like glucose (CHO)

Answer 10

organotrophs

Question 11

Growth Factor (growth & development)

Answer 11

Vitamin B complex, amino acid

Question 12

synthesis of proteins and nucleic acids

Answer 12

Nitrogen, Sulfur Phosphorus

Question 13

physical reqs of bacteria (please observe him or them, moist and rate)

Answer 13

pH, Osmotic pressure, Hydrostatic pressure, oxygen, temperature, moisture/water, radiation

Question 14

alkalophiles

Answer 14

8.4-9.0 pH

Question 15

neutrophiles

Answer 15

6.5-7.5 pH

Question 16

Acidophiles

Answer 16

less than 6 pH

Question 17

osmotic pressure determined by _____

Answer 17

salt concentration

Question 18

high salt concentration

Answer 18

halophiles

Question 19

high osmotic pressure

Answer 19

osmophiles

Question 20

(medically important bacteria

Answer 20

Facultative

Question 21

Thermophiles

Answer 21

higher than 40c

Question 22

mesophiles

Answer 22

20-40c

Question 23

psychrophiles

Answer 23

10-20c

Question 24

Serves as medium for acquiring nutrients

Answer 24

moisture/water

Question 25

high-energy radiation to sunlight, can be used to kill microbes or inhibit their growth

Answer 25

radiation

Question 26

represents the number of live cells in abacterialpopulation over a period of time.

Answer 26

bacterial growth curve

Question 27

There are four distinct phases of the growth curve:

Answer 27

lag phase, logarithmic/exponential phase, stationary phase, death phase

Question 28

x bacteria are metabolically active but not dividing to synthesize DNA x Attain maximum size at the end of lag phase x Last for 1-4 hours

Answer 28

LAG PHASE

Question 29

x Rapid cell division x High metabolic activity x Generation time or doubling time x Last for about 8 hours

Answer 29

Logarithmic/Exponential Phase

Question 30

x Period of equilibrium x Number of living cells equals the # of dead cells. x Growth rate slows down, nutrient depletion x Toxic waste begin to accumulate. x Gram positive become Gram negative

Answer 30

Stationary Phase

Question 31

x Rapid cell death x Continious depletion of nutrients x Sporulation continues x last for a few hours to a few days

Answer 31

DEATH PHASE

Question 32

Why does death phase took longer?

Answer 32

because bacterias are hard to eradicate

Question 33

exponential increase in number of living bacterial cells

Answer 33

log phase

Question 34

no increase in number of living bacterial cells

Answer 34

lag phase

Question 35

plateau in number of living bacterial cells; rate of cell division and death roughly equal

Answer 35

stationary phase

Question 36

exponential decrease in number of living bacterial cells

Answer 36

death or decline phase