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final review test 2
study guide
56
Microbiology
Undergraduate 2
12/14/2010

Additional Microbiology Flashcards

 


 

Cards

Term

Small proteinaceous appendages in bacteria that function in DNA exchange are called conjugation:

a. fimbraie

b. pili

c. inclusions

d. plasmids

Definition
b. pili
Term

Chemotaxis is best defined as directed:

a. reproduction

b. proetein systhesis

c.metabolism

d. movement

Definition
d. movement
Term

1. shaped like a corckscrew

2. variation in shape

3.curved (comma-shaped) rod)

4. spherical bacterial in long chains

5. small rod or flattened sphere shape

 

a. coccobacillus

b. pleopmorphic

c. streptococci

d.spirilla

e.vibrio

Definition

1. D, spirilla

2. B, pleomorphic

3. E, vibrio

4. A, streptococci

5. C, coccobacillus

Term

True or False

Bacteria can have on to dozens of chromosomes, depending on the species

Definition
False
Term

True or False

The phospholipids of bacterial membranes contain both hydrophobic and hydrophilic portions

Definition
True
Term

Which environmental condition favors the trophozoite form in protozoa?

a. lack of nutrients

b. high moisture

c.presence of drugs of chemicals

d.none of the above

Definition
B high moisture
Term

A FUNGAL FILAMENT IS CALLLED AN:

a. mycelium

b. hypha

c.euphnium

d.spore

Definition
b hypha
Term

1. Pathogenic forms are usually spread in vectors

2. single celled with no cell wall

3. carry out photosynthesis

4. usually have hyphae

 

a. algae

b. protozoa

c.fungi

d.helminths

Definition

1.B, protozoa

2. B, protozoa

3. A, Algae

4. D, fungi

Term

cestodes and trematodes are types of

a. fungi

b. bacteria

c.protozoa

d.helminths

Definition
D helminths
Term

most vectors are

a. insects

b. non-living

c.fungi

d.bacteria

Definition
a. insects
Term

True or False

Prokaryotes have DNA, but it is not contained inside a nucleues

Definition
True
Term

True or False

Meiosis occurs in both sex cells and somatic (non-sex or body) cell

Definition
False
Term

A naked virus is missing

a. capsid

b. nucleic acid

c. a cirion

d. an envenlope

Definition
D. an envenlope
Term

Which is enzyme is required to be present in a minus strand RNA virus?

a. RNA- dependent RNA polymerase

b. DNA-dependent RNA polymearse

c.DNA dependent DNA polymerase

d.RNA dependent DNA polymerase

Definition
b, DNA dependent RNA polymerase
Term

1. binds enveloped viruses to host cells

2.can consist of a protein coat and DNA

3. Formed from host cell membrane

4. Binds unenveloped viruses to hosts

 

a. capsid

b. nucleiocapsid

c.envenlope

d.spikes

Definition

1. D, spikes

2. B, nucleocapsid

3.C, envenlope

4. A, capsid

Term

Animal (including human viruses usually penetrte a host cell by

a. injection

b. exocytosis

c.pili

d.endocytosis

Definition
D, endocytosis
Term

The abnormal products of oncogenes have been shown to

a. enhance the antiviral activity of antiviral drugs

b. stimulate viral growth within bacteria

c.convert protein to DNA in viruses

d.encourage cell transformation in cancers

Definition
D, encourages cell transformation in cancers
Term

Host range refers to

a. types of viruses that a species can host

b. types of host a virus can infect

c.tyoes of viral nucleic acid

d.insects that carry a virus

Definition
B types of host a virus can infect
Term

True or False

The slow release of enveloped viruses over a long period of time is characteristic of a persistent infection

Definition
True
Term

True or False

Viruses can contain DNA or DNA buth not both

 

Definition
True
Term

True or False

Viral genes carry information to invade host cells and direct viral assembly, but cannot multiply without host cell machinery

Definition
True
Term

1. Destruction of most microorganisms and viruses on non living surface.

2. removal of pathogens from objects to meet public health standard

3.use of heat to slow spolage in foods and beverages.

4. reduction of all microorganism and viruses, espcially pathogens, on living tissue

5. deduction of all microorganism and viruses in or on an object.

 

a.anitsepsis

b.sterilization

c. disinfection

d. pasteurization

e. sanitization

Definition

1. C, disinfection

2. E, Sanitization

3. D pasteurization

4. A, antisepsis

5. B, sterilization

Term

an autoclave use ______ to kill microorganisms

a. heat

b. pressure

c. both a and b

d. neither a nor b

Definition
c. both a and b
Term

Which of the following is most effective for sterilizing mattresses and plastic Petri dishes?

a. autoclaving

b. incineration

c. ethylene oxide gas

d. pasteurization

Definition
C. ethylene oxide gas
Term

The pheno coefficient is an indicator of the ____ of an antimicorbial chemical

a. classification

b. strength

c. alcohol content

d. color

 

Definition
b. strength
Term

Silver nitrate is given to newborns in the hospital to prevent blindness. silver nitrate is an:

a. alohol

b. heavy metal

c. phenolic compound

d. halide

Definition
B, heavy metal
Term

True or False

Gamma rays can be used to sterilize some items

Definition
True
Term

True or False

A bactericidial compound prevents the groeth of bacteria but doesnt kill them

 

Definition

False

 

Term

1. Inhibit cell wall synthesis

2. inhibit protein synthesis

3. disrupt cell membranes

4. inhibit nucleic acid synthesis

5. block production of folic acid

 

a. beta(symbol)-lactam drugs

b.polymyxin B

c. quinolones

d. aminoglycosides

e. sulfa drugs

Definition

1. A, Beta lactam drugs

2. D, aminoglycosides

3. B, polymyxin B

4. C, quinoles

5. E, sulfa drugs

Term

A clear zone around an antibiotic disc on baceria-covered agar indicates the bacteria are ____ the drug

a. sensitive to

b. resistant to

c. reserviors of

d. not effected by

Definition
a sensitive to
Term

Which of the following is not a mechanism for antiviral drugs?

a. inhibits uncoating

b. inhibits nucleic acid synthesis

c. inhibits membrane synthesis

d. inhibits release of virus

 

Definition
a inhibits uncoating
Term

The use of a drug to prevent imminet infection of a person at risk is called

a. anaphylaxis

b. narrow spectrum

c. prophylaxis

d. antisepsis

 

Definition
c. prophylaxis
Term

chloramphenicol binds to the 50S ribosomal subunit, which interferes with

a. prokaryotic transcription

b. eukaryotic transcription

c. prokaryotic translation

d. eukaryotic translation

Definition
c prokaryotic translation
Term

Resistance to antibacterial drugs can be obtained by

a. mutation

b. conjugation (plasmiod)

c. bacterial structure

d. all the above

 

Definition
d all the above
Term

a series of dilutions of antibiotics is made (1/2, 1/4, 1/8, 1/16 etc.) and the same number of bacteria put in each tube. At 1/64, there is turbidity (cloudiness) in the tube. The minimum concertration is

a. 1/2

b.1/4

c. 1/32

d. 1/64

Definition
c 1/32
Term

selecive toxicity means a drug is effective against ___ but not against __

a. gram +: gram -

b. bacteria: viruses

c. pathogens: host

d. viruses: bacteria

Definition
c. pathogens: host
Term

T or F

A broad spectrum antibiotic is active against a variety of pathogens

Definition
True
Term

T or F

An R factor is a type of plasmid that confers antibiotic release

 

Definition
True
Term

T or F

An antimicrobial drug that precents bacteria from increasing amount of peptidoglycan would be classified as bacteria

 

Definition
True
Term

WHich of the foloowing is the substance referred to as endotoxin

a. streptolysin

b. cogulase

c.collagenase

d. lipopolysaccharide

Definition
d lipopolysaccharide
Term

Which of the following would be a symptom of a disease?

a. sore throat

b. chest sounds (rales)

c. skin rash

d. leukocytosis

Definition
a sore throat
Term

Door knobs, money, toys, and toilet seats are all examples of

a. prophylactics

b. zoonose

c. vector

d. fomites

Definition
d fomites
Term

Which of the following is not a virulence factor?

a.toxins

b. adhesion factors

c.extracellular enzymes

d. anti-phagocytosis

e. all of these a virulent factors

Definition
e all are virulence factors
Term

A bacterial capsule

a. inhibits phagocytosis

b. acts as an enzyme

c. increase phagocystosis

d. is released by dead bacteria

Definition
a inhibits phagocytosis
Term

Koch's postulate determines

a. if a microbe is an oppurtunist

b. if a microbe is a virus

c. if a persons immune system works

d. if a microbe causes disease

Definition
d. if a microbe cause disease
Term

WHich of the following statements is the best definition of an pandemic?

a. it normally occurs in a given geographic area

b. it is a disease that occurs more frequently than usal for a geographical are or group of people

c. it occurs infrequently at not predictable time scatterd over a large area or population

d. it is an epidemic that occurs on more than one continent at the same time

Definition
D
Term

normal microbiota on the skin:

a. dont causes diesease ever

b. are oppurtunist only

c. can cause disease when the skin is broken

d. includes mostly viruses

Definition
C can cause disease when the skin is broken
Term

Prope hand washing and asceptic techniques greatly reduce the likelihood of medical professionals serving as ____ carries

a.latent

b. active

c. passive

d. convalescent

Definition
c, passive
Term

which of the following has no normal flora?

a. distal (outer) uretha

b. bladder

c. skin

d. outer eye

Definition
b. bladder
Term

Botulism toxin is released by clostridium perfringes, a gram positive rod.Botulism is an

a. exotoxin

b. endotoxin

c.extracellular enzyme

d. capsule component

Definition
a. exotoxin
Term

Normal microbiota that can cause disease under certain cirumstances are

a.gram + bacteria only

b/ gram- bacteria only

c. oppurtunist

d.fungi only

Definition
c oppurtunist
Term

T or F

convalescent carries cannot pass pathogens to suspectible hosts

Definition
False
Term

T or F

Humans and microorganism can live in closse association without causing disease?

Definition
T
Term

T or F

WHite blood cells capable of engulfing microorganism are called phagocytes

Definition
True
Term

T or F

House flies can pick up pathogens on their legs and deposit them on food. House flies would be classified as biological, rather than mechanical, vectors

Definition
False
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