Lecture Exam 2

A  milk at pH 6.5

B  human blood at pH 7.2

C  a hot vent at pH 1.5

D  human intestine at pH 8.5

A  that they grow well at low oxygen

B  that they grow well at low oxygen

C  that they grow well at high pH

D  that they grow well at high pressure

E  that they grow well at low pH

A  storage

B  survival

C  protein synthesis

D  reproduction

A  the temperature that has the longest time between cell divisions

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

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

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

A  they lack the correct enzymes

B  they lack the correct atmospheric pressure

C  they lack the correct pH

D  they lack the correct nucleus

E  they lack the correct salt concentration

A  acidophile.

B  osmotolerant.

C  facultative anaerobe

D  aerotolerant anaerobe.

E  obligate aerobe.

A  decline phase

B  exponential or logarithmic phase

C  stationary phase

D  lag phase

A  due to the exhaustion of nutrients

B  more than one of the above is correct

C  due to the accumulation of toxic metabolites

D  none of these are correct

E  due to the rise in cell density

A  facultative anaerobes

B  alkaliphiles

C  neutrophiles

D  obligate anaerobes

A  all of these are correct

B  none of these are correct

C  bacterial motility.

D  bacterial conjugation.

E  two of the choices are correct only

F  adherence to certain surfaces.

A  osmotolerant

B  aerotolerant anaerobe

C  acidophile

D  neutrophile

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 phototroph

B  a chemoheterotroph

C  a heterotroph

D  a chemotroph

A  thermophile â growth at 50°C

B  mesophile â growth at 0°C

C  hyperthermophiles â growth at 85°C

D  psychrophile â growth at 15°C

A  acidophiles

B  thermophiles

C  psychrotrophs

D  mesophiles

A  an obligate aerobe

B  an aerotolerant anaerobe

C  a facultative anaerobe

D  an obligate anaerobe

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

B  yogurt cultured at room temperature

C  contaminated plates left in a 35 °C incubator

D  mountain lake with a water temperature of 12 °C

A  >40°C

B  25-40°C

C  20-30°C

D  None of these

A  internal structure of fixed cells.

B  surface structure of fixed cells.

C  internal structure of live, living cells.

D  surface membranes of live, living cells.

A  fluorescence microscopy

B  bright-field microscopy

C  dark-field microscopy

D  scanning electron microscopy

E  phase-contrast microscopy

A  light penetration

B  diameter.

C  length.

D  size

A  lower

B  higher

C  the same

D  no relationship on

A  darkfield microscope

B  electron microscope

C  brightfield microscope

D  differential interference contrast microscope

A  light with a long wavelength

B  light with an intermediate wavelength

C  radio wavelength

D  light with a short wavelength

A  the microscope’s resolution.

B  the microscope’s clarity.

C  the microscope’s magnification.

D  the minimum cell size of a cell.

A  immunofluoresnce

B  differential Interference Contrast microscopy

C  bright-field microscopy with staining

D  phase contrast microscopy

A  phase-contrast

B  dark-field

C  bright-field

D  scanning electron

E  transmission electron

A  colon

B  nose

C  throat

D  hand

A  dying

B  floating

C  reproducing

D  moving

E  attaching

A  peptidoglycan

B  capsule

C  flagellum

D  cell wall

A  the production of exotoxins or endotoxins.

B  the presence of anatomical structures such as pili.

C  all of these

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

A  prevented the virus from entering the host cell

B  prevented the virus from attaching to the host cell

C  none of these are correct

D  destroyed the viral nucleic acid

E  more than one of the above is correct

F  prevented the virus from leaving the host cell

A  cause target cells to cell divide

B  more than one of the above is correct

C  none of these are correct

D  punch holes in target cells

E  cause target cells to mutate

F  cause target cells to function more efficiently

A  nucleus

B  mitochondria

C  more than one of the above is correct

D  flagella

E  endoplasmic reticulum

F  chloroplasts

A  phototaxis

B  chemotaxis

C  gliding motility

D  tumbling

A  oxygen

B  starvation

C  nutrients

D  water

A  evade phagocytosis

B  move to a new location

C  damage host cells

D  build biofilms

E  evade PAMPS activation

A  lipids

B  nucleic acids

C  carbohydrates

D  protein

A  peritrichous

B  lophotrichous

C  monotrichous

D  monotrichous

A  they are used in DNA exchange

B  more than one of the above is correct

C  they are used in motility

D  they can cause antibiotic resistance

E  none of these are correct

F  they are used in attachment

A  acidophiles

B  barophiles

C  halotolerant

D  thermophiles

A  attachment increases parasitic damage to the host

B  attachment increases endospore formation

C  attachment increases the exchange of genes

D  attachment increases motility

A  endospores are more resistant to temperature changes

B  endospores are more likely to die in nutritionally poor conditions

C  endospores are more likely to survive treatment with disinfectants

D  endospores are more resistant to staining

A  fimbria

B  plasma membrane

C  pilum

D  axial filament

A  flagellum

B  capsule

C  pili

D  pore forming toxins

E  more than one of the above is correct

F  none of these are correct