Lecture Exam 2

A  a hot vent at pH 1.5

B  milk at pH 6.5

C  human blood at pH 7.2

D  human intestine at pH 8.5

A  that they grow well at high pressure

B  that they grow well at low oxygen

C  that they grow well at low pH

D  that they grow well at low oxygen

E  that they grow well at high pH

A  storage

B  reproduction

C  survival

D  protein synthesis

A  the temperature that allows it to grow with the shortest generation time

B  the temperature that has the longest time between cell divisions

C  the temperature that is near one extreme of its range of tolerated temperatures

D  the temperature that has the highest cell growth and highest enzymatic activity

A  they lack the correct pH

B  they lack the correct nucleus

C  they lack the correct atmospheric pressure

D  they lack the correct enzymes

E  they lack the correct salt concentration

A  obligate aerobe.

B  acidophile.

C  osmotolerant.

D  aerotolerant anaerobe.

E  facultative anaerobe

A  decline phase

B  exponential or logarithmic phase

C  stationary phase

D  lag phase

A  none of these are correct

B  due to the rise in cell density

C  due to the exhaustion of nutrients

D  more than one of the above is correct

E  due to the accumulation of toxic metabolites

A  alkaliphiles

B  obligate anaerobes

C  facultative anaerobes

D  neutrophiles

A  all of these are correct

B  two of the choices are correct only

C  adherence to certain surfaces.

D  bacterial motility.

E  bacterial conjugation.

F  none of these are correct

A  acidophile

B  aerotolerant anaerobe

C  neutrophile

D  osmotolerant

A  An individual that is suffering maximum host cell damage and is manifesting clear and distinct symptoms of the particular disease.

B  none of these are correct

C  An individual that has been exposed to an infectious microorganism and the microorganism is replicating, but microorganism numbers have not yet reached levels necessary to produce visible symptoms.

D  An individual that has survived the acute phase of the disease because of an effective immune system and/or because of effective treatment.

A  a heterotroph

B  a phototroph

C  a chemotroph

D  a chemoheterotroph

A  hyperthermophiles â growth at 85°C

B  psychrophile â growth at 15°C

C  thermophile â growth at 50°C

D  mesophile â growth at 0°C

A  thermophiles

B  psychrotrophs

C  acidophiles

D  mesophiles

A  an obligate aerobe

B  a facultative anaerobe

C  an aerotolerant anaerobe

D  an obligate anaerobe

A  mountain lake with a water temperature of 12 °C

B  contaminated plates left in a 35 °C incubator

C  yogurt cultured at room temperature

D  salt pond in the desert with a daytime temperature of 34 °C

A  >40°C

B  25-40°C

C  None of these

D  20-30°C

A  surface membranes of live, living cells.

B  internal structure of fixed cells.

C  internal structure of live, living cells.

D  surface structure of fixed cells.

A  dark-field microscopy

B  phase-contrast microscopy

C  scanning electron microscopy

D  bright-field microscopy

E  fluorescence microscopy

A  length.

B  light penetration

C  size

D  diameter.

A  no relationship on

B  the same

C  lower

D  higher

A  darkfield microscope

B  electron microscope

C  differential interference contrast microscope

D  brightfield microscope

A  light with an intermediate wavelength

B  light with a short wavelength

C  light with a long wavelength

D  radio wavelength

A  the microscope’s magnification.

B  the microscope’s clarity.

C  the minimum cell size of a cell.

D  the microscope’s resolution.

A  phase contrast microscopy

B  immunofluoresnce

C  differential Interference Contrast microscopy

D  bright-field microscopy with staining

A  dark-field

B  transmission electron

C  bright-field

D  scanning electron

E  phase-contrast

A  colon

B  nose

C  hand

D  throat

A  attaching

B  reproducing

C  moving

D  floating

E  dying

A  cell wall

B  peptidoglycan

C  flagellum

D  capsule

A  all of these

B  the presence of anatomical structures such as pili.

C  the production of various enzymatic activities such as hemolysins and leucocidins

D  the production of exotoxins or endotoxins.

A  prevented the virus from attaching to the host cell

B  destroyed the viral nucleic acid

C  more than one of the above is correct

D  prevented the virus from entering the host cell

E  prevented the virus from leaving the host cell

F  none of these are correct

A  punch holes in target cells

B  cause target cells to mutate

C  cause target cells to function more efficiently

D  more than one of the above is correct

E  none of these are correct

F  cause target cells to cell divide

A  more than one of the above is correct

B  mitochondria

C  nucleus

D  chloroplasts

E  flagella

F  endoplasmic reticulum

A  phototaxis

B  gliding motility

C  tumbling

D  chemotaxis

A  starvation

B  oxygen

C  nutrients

D  water

A  move to a new location

B  build biofilms

C  evade phagocytosis

D  evade PAMPS activation

E  damage host cells

A  lipids

B  nucleic acids

C  protein

D  carbohydrates

A  monotrichous

B  lophotrichous

C  monotrichous

D  peritrichous

A  they can cause antibiotic resistance

B  more than one of the above is correct

C  they are used in DNA exchange

D  none of these are correct

E  they are used in motility

F  they are used in attachment

A  halotolerant

B  barophiles

C  thermophiles

D  acidophiles

A  attachment increases parasitic damage to the host

B  attachment increases motility

C  attachment increases the exchange of genes

D  attachment increases endospore formation

A  endospores are more resistant to staining

B  endospores are more likely to survive treatment with disinfectants

C  endospores are more resistant to temperature changes

D  endospores are more likely to die in nutritionally poor conditions

A  axial filament

B  pilum

C  plasma membrane

D  fimbria

A  pore forming toxins

B  none of these are correct

C  flagellum

D  more than one of the above is correct

E  pili

F  capsule