chap 11 part 3

Question 1

Coloniesrangefromsmall(pinpoint)tolargewhile others appear mucoid or slimy.

Answer 1

size

Question 2

Margin of coloniesis mostly

Answer 2

smooth or entire

Question 3

As to elevation, colonies mayappear ___

Answer 3

raised,flat, convex or sometimes umbonate.

Question 4

Colonies may bepigmented or colored, butnotall bacterial species havethis distinctive
feature.

Answer 4

chromogenesis

Question 5

Colonies may appear ___

Answer 5

optical feature
opaque, transluscent, shiny, opalent

Question 6

Growth of bacteria may produce putrid, fruity, ammoniacal, or ___.

Answer 6

odor - aromatic odor

Question 7

growthmay be scanty,moderate, orabundant

Answer 7

amount

Question 8

colonies may appear butyrous o r butter-like, viscous or stingy, dry and brittle

Answer 8

consistency

Question 9

colonies may be pigmented

Answer 9

chromogenesis

Question 10

It is theperiodwhenthereis nocelldivision oran abruptincrease in the cellnumber.

Answer 10

lag phase or period of rejuvenescence

Question 11

It is the start of biosynthesis although there is no increase in cell mass.

Answer 11

lag phase or period of rejuvenescence

Question 12

It is the adjustmentphasetoanewenvironment

Answer 12

lag phase or period of rejuvenescence

Question 13

Itis the period when microorganismsare actively growing anddividing.

Answer 13

log or exponential phase

Question 14

I t i s t h e stage in which the bacteria increaselogarithmically sincecellular production is most
activeduringthis period.

Answer 14

log or exponential phase

Question 15

microorganisms areutilized in physiological, biochemical. and antimicrobial testing

Answer 15

log or exponential phase

Question 16

period when there is balance between cell division and dying organisms and viable microorganisms remains constant

Answer 16

stationary/plateau phase

Question 17

phase where metabolic activity of surviving cells slow down and become limited

Answer 17

stationary/plateau phase

Question 18

phase which dead debris starts to accumulate

Answer 18

stationary/plateau phase

Question 19

period when there is cessation of bacterial growth as no. of dead cells exceeds living microorganisms

Answer 19

decline phase

Question 20

phase where there is loss of nutrients and increase toxic waste

Answer 20

death or decline phase

Question 21

doubling of cell number

Answer 21

generation

Question 22

time required for bacteria to double their population

Answer 22

doubling time/generation time

Question 23

It is the most common asexualreproductive process in which a single cell dividesinto two daughter cells after developing a transverse cell wall.

Answer 23

transverse binary fission

Question 24

growth measurement

Answer 24

by cell count, cell mass, cell activity

Question 25

microscopy,useof electronicparticlecounter, or colonycount

Answer 25

cell count

Question 26

weighing,measuringthenitrogencontent, andturbidimetry

Answer 26

cell mass

Question 27

observationof thebiochemicalactivity

Answer 27

cell activity

Question 28

measured volume of a bacterialsuspension is placed on a microscope slide or on a counting chamber.
Itdoesnotdistinguishbetweenlivingcells and dead cells

Answer 28

microscopic count

Question 29

It is the most commonlyused method. It measures the number of: viable cells.

Answer 29

plate count
30-300 colonies

Question 30

It utilizes a polycarbonate membrane filter or millipore filter.

Answer 30

membrane or molecular filter

Question 31

requires 10 to 100 million cells/mL.

Answer 31

turbidimetric method

Question 32

requires 10 to 100 million cells/mL.

Answer 32

turbidimetric method