BACTERIA II

Question 1

Living together of two different organisms or population

Answer 1

SYMBIOSIS

Question 1

types of symbiosis:

Answer 1

parasitism
mutualism
commensalism

Question 2

one organism lives in or exploits another

Answer 2

PARASITISM

Question 3

both organisms or populations are benefits

Answer 3

MUTUALISM

Question 3

symbiosis is Identified/Classified by:

Answer 3

cell morphology
staining procedures
fixation

Question 4

two organisms live in association and one is benefited while the other is neither benefited nor harmed

Answer 4

COMMENSALISM

Question 5

Characteristics of symbiosis

Answer 5

Bergey’s Manual of Systematic Bacteriology:
23 phyla 32 classes 5 subclasses 77 orders 14 suborders 182 families 871 genera 5,007 species

Question 6

symbiosis is categorized by:

Answer 6

gram-positive with cell wall
gram-negative with cell wall
no cell wall

Question 7

types of cell morphology

Answer 7

cocci (diplococci, streptococci, staphylococci, tetrads, octads)
pleomorphic (variety of shapes)
bacilli (diplobacilli, streptobacilli, coccobacilli, long filaments, branched)
spirilla (single or in pairs, spirochetes)

Question 8

staining procedures category and examples

Answer 8

simple straining procedure (staining in methylene blue)
structural straining procedure (capsule, flagella, endospore stain)
differential straining procedure (gram, acid-fast stain)

Question 9

Fixation types:

Answer 9

kills the organism
preserves morphology
anchor smear to slide

Question 10

SIMPLE STAINING steps:

Answer 10

smear loopful of microbes onto slide
air-dry
drip methanol onto specimen to fix
flood slide with stain
rinse with water and blot dry
examine with x100 objectives

Question 11

most spiral-shaped and about half of bacilli use flagella for movement

Answer 11

Motility

Question 12

is based on the size, color, shape, elevation, and margin appearance of colonies that are grown in pure culture on an agar plate

Answer 12

Colony morphology

Question 13

Atmospheric requirements

Answer 13

obligate aerobes
microaerophilic aerobes
facultative anaerobes
aerotolerant anaerobes
obligate anaerobes
capnophiles

Question 14

require air containing 20% oxygen

Answer 14

obligate aerobes

Question 15

require air containing 5% oxygen

Answer 15

microaerophilic aerobes

Question 16

can survive in presence or absence of O2

Answer 16

facultative anaerobes

Question 17

do not require oxygen but can survive; toleration varies

Answer 17

aerotolerant anaerobes

Question 18

can only grow in anaerobic environment

Answer 18

obligate anaerobes

Question 19

bacteria that grow best with higher concentrations of CO2

Answer 19

capnophiles