Chap. 27 PP

Question 1

Genetic variation in bacterial populations cannot result from:

a. transduction
b. conjugation
c. mutation
d. meiosis

Answer 1

d. meiosis

Question 2

Photoautotrophs use

a. light as an energy source and CO2 as a carbon source
b. light as an energy source and methane as a carbon source
c. N2 as an energy source and CO2 as a carbon source
d. CO2 as both an energy source and a carbon source

Answer 2

a. light as an energy source and CO2 as a carbon source

Question 3

Which of the following statements is not true?

a. Archaea and bacteria have different membrane lipids
b. the cell walls of archaea lack peptidoglycan
c. only bacteria have histones associated with DNA
d. only some archaea use CO2 to oxidize H2, releasing methane

Answer 3

c. only bacteria have histones associated with DNA

Question 4

Which of the following involves metabolic cooperation among prokaryotic cells?
a. binary fission
b. endospore formation
c biofilms
d. photoautotrophy

Answer 4

c. biofilms

Question 5

Bacteria perform the following ecological roles. Which role typically does not involve symbiosis?

a. skin commensalist
b. decomposer
c. gut mutualist
d. pathogen

Answer 5

b. decomposer

Question 6

Plantlike photosynthesis that releases O2 occurs in

a. cyanobacteria
b. gram-positive bacteria
c. archaea
d. chemoautotrophic bacteria

Answer 6

a. cyanobacteria

Question 7

Name the three shapes of cells and what they look like

Answer 7

coccoid, bacillus, spiral

Question 8

Cyanobacteria are _____; only O2 generating

Answer 8

photoautotrophic

Question 9

Are cyanobacteria found in saltwater?

Answer 9

No. They are mostly found in freshwater

Question 10

Do all species of cyanobacteria fix nitrogen via heterocysts?

Answer 10

No, only some species of cyanobacteria fix nitrogen via heterocysts.

Question 11

T/F Cyanobacteria have flagella and do not glide.

Answer 11

False. Cyanobacteria do not have flagella and glide, instead

Question 12

Some forms of ___ are multicellular with specialization.

Answer 12

Some species of cyanobacteria are multicellular with specialization

Question 13

Some species of cyanobacteria fix nitrogen via what?

Answer 13

Heterocysts (large, transparent, thick cell wall)

Question 14

What are spirochetes

Answer 14

A flexible, spirally twisted bacterium, especially one that causes syphilis

Question 15

Treponema pallida has what common name? This is what type of bacterium?

Answer 15

Syphilis; Spirochete

Question 16

What type of spirochete is associated with periodontal disease?

Answer 16

Treponema denticola

Question 17

A non-pathogenic spirochete associated with periodontal disease:

Answer 17

Treponema denticola

Question 18

Borrelia burgdorferi

Answer 18

Lyme’s disease

Question 19

Is chlamydia a sexually transmitted disease?

Answer 19

Yes

Question 20

Obligate intracellular parasites of animals

Answer 20

Chlamydia

Question 21

For chlamydias, all of its ATP comes from where?

Answer 21

Host

Question 22

What are the symptoms of Chlamydia trachoma’s?

Answer 22

Blindness, STD

Question 23

Chlamydias are obligate _____ parasites of animals

Answer 23

intracellular

Question 24

T/F Chlamydia lack peptidoglycan in walls

Answer 24

True

Question 25

Regarding gram stains, what is unique about chlamydias?

Answer 25

Chlamydias are gram negative but lack peptidoglycan in walls

Question 26

Which definition fits Spirochete?
a. A flexible, spirally twisted bacterium, especially one that causes syphilis

b. Obligate intracellular parasites of animals

Answer 26

a. flexible, spirally twisted bacterium, especially one that causes syphilis

Question 27

What is an example of an emerging pathogen?

a. HIV
b. Ebola
c. Legionnaire’s disease

Answer 27

c. Legionnaire’s Disease

Question 28

PP: name an example of a bacterium causing a public health problem in developing nations:

Answer 28

Salmonella typhi

Question 29

List three reasons for the growing resistance of antibiotics?

Answer 29

a. antibiotics in agriculture
b. inappropriate or improper use of antibiotics
c. hospitals as reservoirs of resistance

Question 30

Name two non-special tests to identify bacteria in a medical staining?

Answer 30

morphology

gram stain

Question 31

When identify a bacteria in a medical setting, what will each culture require to grow?

Answer 31

nutrients, oxygen

Question 32

Motility
Hemolytic ability
Other stains
…there are all examples of what?

Answer 32

tests to identify bacteria in a medical setting

Question 33

T/F Antibiotic susceptibility can be used to identify bacteria in a medical setting

Answer 33

True

Question 34

Why are prokaryotes important?

Answer 34

a. extremely important in detrital food chain

Question 35

Why are numerous species of prokaryotes overlooked?

Answer 35

They are resistant to culturing

Question 36

Know the cell wall’s parts

Answer 36

peptidoglycan, outer membrane, cytoplasm, cytoplasmic membrane

Question 37

When a bacteria is gram-positive, what can you know about the cell wall?

Answer 37

There is one plasma membrane and a thin peptidoglycan layer (thin cell wall)

Question 38

When a bacteria is gram-negative, how many membranes does it have? What color will the test be? What two membranes does it have?

Answer 38

Two membranes, pink, outer membrane, plasma membrane

Question 39

A _____ is the polysaccharide layer that lies outside the cell envelope

Answer 39

Capsules

Question 40

A polysaccharide layer that lies outside the cell envelope

Answer 40

Capsule (cell membrane and cell wall)

Question 41

Rotary movement, propulsion, arrangement
Helical filaments (spirochetes)
In periplasmic space between membranes

Answer 41

Flagella