Microbiology Test 3

Front 1

What viruses cause latent infections?

Back 1

Herpesvirus

Front 2

Archea is a eukaryote. True or False?

Back 2

False

Front 3

Bacteria found in extreme environments would likely be described as a member of the _________ family.

Back 3

Archaeobacteria

Front 4

What is the correct order of steps in typical virus replication?

Back 4

Absorption -- Penetration -- Synthesis -- Maturation

Front 5

What microorganism was once called blue-green alge?

Back 5

Cyanobacteria

Front 6

What life-cycle characteristics do chlamyiae and rickettsiae share?

Back 6

Both are obligate intracellular parasites.

Front 7

If an organism contains 13% adenine in its DNA, its GC content is what percent?

Back 7

74%

Front 8

Which of the kingdoms includes all prokaryotic organisms?

Back 8

Monera

Front 9

Which reference would be most beneficial for identifying an unknown bacterial source?

Back 9

Bergy's Manual of Systemic Biology

Front 10

A ___________ is a subset of bacterial species that has characteristics that distinguish it from other members of the same species?

Back 10

Strain

Front 11

Some viruses have a lipid by-layer also known as the viral envelope. The viral envelop is likely to come from what source?

Back 11

Host Cell Plasma Membrane

Front 12

Several HPVs have shown a strong correlation with some human cancers such as?

Back 12

Warts and Carcinoma of the Uterine Cervix

Front 13

The three domain system of classification includes what three classes?

Back 13

Archea
Bacteria
Eukarya

Front 14

AIDS is caused by a retrovirus. What is the genetic information flow used by retroviruses?

Back 14

RNA -- DNA -- mRNA -- Protein

Front 15

Members of the kingdom protozoa differ from members of the kingdom monera mainly due to the presence of what?

Back 15

Membrane Bound Nucleus

Front 16

Viruses that can infect bacteria are called what?

Back 16

Bacteriophages

Front 17

A viroid is what?

Back 17

A small RNA segment that can cause plant disease.

Front 18

Within the kingdom monera, the group that is of most interest to medical microbiologists is what?

Back 18

Eubacteria

Front 19

Orthomyxoviruses are not DNA viruses. True or false?

Back 19

True

Front 20

Rickettesiae and Chamaydiae are unusual in that they what?

Back 20

Must live inside the host cell.

Front 21

In DNA hybridization experiments, DNA from two closely related organisms will show what?

Back 21

A high percentage of annealing

Front 22

In Griffith's transformation experiments, what did not take place?

Back 22

DNA was transferred from smooth to rough bacteria using a bacteriophage.

Front 23

Feedback inhibition differs from end product repression because feed back inhibition...

Back 23

Stops the action of preexisting enzymes.

Front 24

Genes can be transformed horizontally from one organism to another by what three ways?

Back 24

Transduction
Conjugation
Transformation

Front 25

An enzyme produced constantly is called what?

Back 25

Constitutive Enzyme

Front 26

Without action of DNA ligase, cells would not be able to complete their replication. What is the function of DNA Ligase?

Back 26

Binds DNA sequences together to generate a continuous strand.

Front 27

After _______ by a bacteriophage, each bacterial fragment from the hose cell chromosome has an equal chance of accidentally becoming part of phage particles during phage reception cycle.

Back 27

Generalized Transduction

Front 28

When the F plasmid is incorporated into the chromosome of F+ bacteria these cells are called what?

Back 28

High frequency recombination.

Front 29

Replication proceeds in one direction around a bacterial chromosome. True or false.

Back 29

False

Front 30

What disease will occur if E. coli O157:H7 contaminated hamburgers?

Back 30

Hemorragic Gastroenteritis

Front 31

Typhoid fever is caused by _________ while typhus is caused by ____________.

Back 31

Salmonella Typhi
Rickettsia

Front 32

Dental Caries is primarily caused by what?

Back 32

Streptococcus mutans

Front 33

A type of culture that can reproduce for an extended number of generations and is used to support viral replication is called what?

Back 33

Continuous Cell Line Culture

Front 34

Reactivation of chickenpox long after the initial infection leads to what disease?

Back 34

Shingles

Front 35

A rare form of cancer that has become common among men with AIDS is called?

Back 35

Kaposis Sarcoma

Front 36

Members of the kingdom protista differ from members of the kingdom monera mainly due to the presence of what?

Back 36

Membran Bound Nucleus

Front 37

The only RNA tumor virus that causes human cancer is what?

Back 37

Retroviruses

Front 38

Who invented binomial nomenclature and is considered to be the father of taxonomy?

Back 38

Carolus Linnaeus

Front 39

Microscopic visual alterations in viral infected cells is best called what?

Back 39

Cytopathic Effect

Front 40

Herpes is a double stranded what?

Back 40

DNA Virus

Front 41

A prion is a type of what?

Back 41

Protein

Front 42

Assembly of new viral components into a complete virion takes place during viral ______.

Back 42

Maturation

Front 43

In Griffith's experiments, the transforming substance was __________.

Back 43

DNA

Front 44

Diseases such as Creutzfeld Jacob dissease, Kuru and Mad Cow Disease are caused by _______

Back 44

Prions

Front 45

Transformation is the transfer of DNA from a donor to recipient cell _________.

Back 45

As a naked DNA in solution.

Front 46

What is commonly used in food preservation?

Back 46

Benzoic Acid

Front 47

Which sterilization method is best used to sterilize liable solutions?

Back 47

Membrane Filtration

Front 48

What is most effective at sterilizing mattresses and plastic petri plates?

Back 48

Ethylene Oxide

Front 49

Warts are caused by ______ virus.

Back 49

Papilloma

Front 50

The incorporation of viral DNA into hose chromosomes not resulting in destruction of the host cell is called what?

Back 50

Lysogeny

Front 51

What is a limitation of an autoclave?

Back 51

Cannot use to sterilize heat liable materials.

Front 52

What concentration of ethyl alcohol is the most effective bactericide?

Back 52

70%

Front 53

RNA viruses usually replicate in the __________ whereas DNA viruses replicate in the ______.

Back 53

Cytoplasm
Nucleus

Front 54

SARS is an viral respiratory illness that was first reported in Asia in 2003. What was identified as the cause of SARS in humans?

Back 54

Coronavirus

Front 55

Ionization radiation is bacteriocidal. True or false?

Back 55

True

Front 56

The most difficult problem is sterilization is to kill what?

Back 56

Bacterial Endospores.

Front 57

Capnophiles grow better at high _____ concentrations.

Back 57

CO2

Front 58

Decimal reduction time is in minutes in which what percent of the population of bacteria at a given temp will be killed?

Back 58

90%

Front 59

U.V. light is an ionization radiation?

Back 59

False

Front 60

Much of the information about how viruses work has been gleaned from studying T even phages that infect what?

Back 60

Bacteria

Front 61

All archeobacteria are strict anerobes. True or false?

Back 61

False

Front 62

Viruses that infect bacteria are know as complex viruses. what diagram best represents a complex virus?

Back 62

Head (including envelope), body and feet like extensions.

Front 63

A naked virus __________.

Back 63

Has not membranous envelope.

Front 64

DNA encoding of ________ would most likely be consumed throughout evolution of an organism.

Back 64

Ribosomes

Front 65

_________ is not a taxonomic method for classifying bacteria.

Back 65

Recombination

Front 66

Viral DNA lying within a bacterial chromosome is called a ______ while the combination of a bacterial cell and its temperate phage is called a _______.

Back 66

Prophage
Lysogen

Front 67

_______ is the science of classification.

Back 67

Taxonomy