Chapter 6- Microbial Growth

Question 0

Microbial growth Cells can be ____ from colonies

Answer 0

Isolated

Question 1

Increase number of cells but not size

Answer 1

Microbial growth

Question 2

Microbial growth is ____ on the growth conditions

Answer 2

dependant

Question 3

Requirements for growth

Answer 3

Physical, chemical

Question 4

Physical requirements for growth

Answer 4

Temp, pH, osmotic pressure

Question 5

Chemical requirements for growth

Answer 5

Carbon, nitrogen, sulfur, phosphorus, trace elements, O2, organic growth factor

Question 6

Room temp

Answer 6

Mesophiles

Question 7

Below 0

Answer 7

Psychrophiles

Question 8

0-30

Answer 8

Psychrotrophs

Question 9

40-70

Answer 9

Thermophiles

Question 10

70 and above

Answer 10

Hyperthermophiles

Question 11

Hypertonic environments or an increase in salt or sugar cause

Answer 11

Plasmolysis

Question 12

Hypotonic environments cause

Answer 12

Cell rupture

Question 13

Backbone of organic molecules

Answer 13

Carbon

Question 14

Primary component or proteins

Answer 14

Nitrogen

Question 15

Protein component

Answer 15

Sulfur

Question 16

In DNA, RNA, ATP, and membranes

Answer 16

Phosphorus

Question 17

Organic compounds obtained from the environment

Vitamins, amino acids, purines, and pyrimidines

Answer 17

Organic growth factors

Question 18

In plaque on teeth

Answer 18

Biofilms

Question 19

Microbial communities
Form slime or hydrogels
Share nutrients
Sheltered from harmful factors

Answer 19

Biofilms

Question 20

Bacteria is attracted by chemicals via

Answer 20

Quorum sensing

Question 21

How do eukaryotes grow

Answer 21

Mitosis, meiosis, and binary fission

Question 22

How do bacteria and archaea grow

Answer 22

Binary fission

Question 23

Cell elongation and DNA replication
CW/ plasma membrane constriction
Cross wall formation(separate/isolate DNA)
Cell separation

Answer 23

Binary fission

Question 24

Nutrients prepare for microbial growth

Answer 24

Culture medium

Question 25

No living microbes

Answer 25

Sterile

Question 26

Introduction of microbes into medium

Answer 26

Inoculum

Question 27

Microbes growling in/on culture medium

Answer 27

Culture

Question 28

Complex polysaccharide Used as solidifying agent for culture media Generally not metabolized by microbes Liquefies at 100C and solidifies at 40C

Answer 28

Agar

Question 29

Exact chemical composition

Answer 29

Chemically defined media

Question 30

Extant ya an digests of yeasts, meat, or plants

Answer 30

Complex media

Question 31

Contain chemicals that combine O2 Heated to drive off O2 Anaerobic

Answer 31

Reducing media

Question 32

Make it easy to distinguish colonies or different microbes

Answer 32

Differential media

Question 33

Suppress some unwanted microbes and encourage desired microbes

Answer 33

Selective media

Question 34

A pure culture contains only ____ species or strain

Answer 34

One

Question 35

A ___ is a population of cells arising from a single cell or spire or from a group of attached cells

Answer 35

Colony

Question 36

A colony is often called a

Answer 36

Colony forming unit

Question 37

The _____ is used to isolate pure cultures

Answer 37

Streak plate method

Question 38

Binary fission Budding Conidiospores Fragmentation

Answer 38

Reproduction in prokaryotes

Question 39

Bacterial growth curve order

Answer 39

Lag Log Stationary Death

Question 40

Intense activity preparing for population growth but no increase in population

Answer 40

Lag phase

Question 41

Exponential increase in population

Answer 41

Log phase

Question 42

Period of equilibrium-microbial deaths balance production of new cells

Answer 42

Stationary phase

Question 43

Population is decreasing at a logarithmic rate

Answer 43

Death phase