Microbiology - chapter 10

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Microbiology
Chapter 10
exam questions chapter 10
updated 5 years ago by marciacaroline
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1

Which of the following characterizes the Domain Bacteria?

prokaryotic cells, ester linkages in phospholipids

2

Which of the following statement about Archaea is True?

a) they are prokaryotes, lack peptidoglycan in their cell walls

b) some are thermoacidophiles; others are extreme halophiles

c) some produce methane from carbon dioxide and hydrogen

3

What are the characteristics of the Kingdom Fungi?

a) Members absorb dissolved organic matter

b) unicellular or multicellular

c) cell walls of chitin

d) develop from spores or hyphal fragments

4

Which of the following statement about member of the Kingdom Plantae is True?

a) they are multicellular

b) they are composed of eukaryotic cells

c) they undergo photosynthesis

e) they synthesize organic molecules

f) cellulose cell wals

5

Which of the following statements about Kingdom Animalia is True?

a) multicellular,

b) no cell walls;

c) chemoheterotrophic

d) they ingest nutrients through a mouth

6

if two organisms have similar rRNA sequences, you can conclude that they

evolved from a common acestor

7

A genus can best be define as

a taxon composed of one or more species and below family

8

A bacterial species differs from a species of eukaryotic organism in that a bacterial species

is a population of cells with similar characterisstics

9

Biochemical tests is an identification method to

determine presence of bacterial enzymes

10

Morphological characteristics is

useful for identifying eukaryotes

11

Differential staining is most used for

gram staining, acid-fast staining

12

Nucleic acid hybridization is based on the fact that

pairing between complementary bases occurs

13

DNA-DNA hybridization method is

a) heat to separate strands

b) combine single strands of DNA

c) cool to allow renaturation of double-stranded DNA

d) determine degree of hybridization

e) complete hybridization: organisms identical

f) partial hybridization : organisms related

g) No hybridization: organisms unrelated

14

The phylogenetic classification are

a) the study of the evolutionary history of organism

b) identify all species of life on Earth

15

The phylogenetic of bacteria is based on

rRNA sequences

16

Classification of Prokaryotes are

a) a population of cells with similar characteristics

b) culture: grown in lab media

c) clone: population of cell derived from a single cell

d) strain: genetically different cells within a clone

17

Classification of Viruses

population with similar characteristics that occupies a particular ecological niche

18

Taxonomy is

a) the science of classification organisms

b) provides universal names for organisms

d) provides a reference for identifying organisms

e) show degrees of relatedness between organisms

19

Classification of Eukaryotes

a group of closely related organisms that breed among themselves

20

Classification and Identification definition are

a) placing organism in groups of related species and lists of characteristics of known organisms is classification

b) matching characteristics of an "unknown" organism to lists of known organism, clinical lab identification

21

Serology test are based on

a) combine known antiserum plus unknown bacterium

b) slide agglutination test

c) antibodies react specifically with an antigen

d) screening bacterial by isolating for similirities

22

Phage typing is base on

bacterial viruses attack only members of a specific species

23

DNA fingerprinting profiles provide direct information about

the similarities between nucleotide sequences

24

Fluorescent in situ hybridization (FISH) are important because

a) it allows for detection of uncultured microbes

b) it demonstrates the diversity of microbes in an environment

c) it allows observation of microbes in their natural environment in association with other microbes

25

Which of the following characteristics indicates that two organisms are closely related

Both of their DNA can hybridize

26

A clone is

genetically identical cells derived from a single cell

27

Which group is a multicellular heterotroph with chitin cell walls?

Fungi

28

Which group is a photosynthetic cell that lacks a nucleus, unicellular, has 70s ribosomes and a peptidoglycan cell wall

Bacteria

29

Which group is a unicellular organisms that lacks a nucleus and peptigolycan

Archea

30

Which group is a multicellular organism that has a mouth and lives inside a human liver

Animalia

31

Which group is a photosynthetic organism that lacks a nucleus and has a thin peptidoglycan wall surrounded by an outer membrane?

Proteobacteria - gram negative bacteria

32

Chloroplasts posses circular DNA and reproduce by binary fission

True

33

The highest level in the taxonomic hierarchy is "Kingdom"?

False

34

Toxonomic Hierarchy are

a) Domain

b) Kingdom

c) Phylum

d) Class

e) Order

f) Family

g) Genus

h) Species

35

When building a CLADOGRAM, the length of the horizontal branch is based on the calculated percent similarity between organisms

True