Lecture Exam 2

A  a hot vent at pH 1.5

B  human intestine at pH 8.5

C  human blood at pH 7.2

D  milk at pH 6.5

A  that they grow well at low oxygen

B  that they grow well at high pressure

C  that they grow well at high pH

D  that they grow well at low oxygen

E  that they grow well at low pH

A  protein synthesis

B  survival

C  storage

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 is near one extreme of its range of tolerated temperatures

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

A  they lack the correct atmospheric pressure

B  they lack the correct nucleus

C  they lack the correct enzymes

D  they lack the correct salt concentration

E  they lack the correct pH

A  facultative anaerobe

B  obligate aerobe.

C  aerotolerant anaerobe.

D  acidophile.

E  osmotolerant.

A  exponential or logarithmic phase

B  decline phase

C  stationary phase

D  lag phase

A  due to the rise in cell density

B  due to the exhaustion of nutrients

C  none of these are correct

D  due to the accumulation of toxic metabolites

E  more than one of the above is correct

A  facultative anaerobes

B  alkaliphiles

C  neutrophiles

D  obligate anaerobes

A  none of these are correct

B  adherence to certain surfaces.

C  bacterial motility.

D  bacterial conjugation.

E  two of the choices are correct only

F  all of these are correct

A  aerotolerant anaerobe

B  neutrophile

C  acidophile

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 survived the acute phase of the disease because of an effective immune system and/or because of effective treatment.

D  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.

A  a heterotroph

B  a chemotroph

C  a chemoheterotroph

D  a phototroph

A  hyperthermophiles â growth at 85°C

B  mesophile â growth at 0°C

C  psychrophile â growth at 15°C

D  thermophile â growth at 50°C

A  mesophiles

B  acidophiles

C  thermophiles

D  psychrotrophs

A  a facultative anaerobe

B  an obligate aerobe

C  an aerotolerant anaerobe

D  an obligate anaerobe

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

B  contaminated plates left in a 35 °C incubator

C  mountain lake with a water temperature of 12 °C

D  yogurt cultured at room temperature

A  None of these

B  20-30°C

C  >40°C

D  25-40°C

A  internal structure of fixed cells.

B  surface membranes of live, living cells.

C  internal structure of live, living cells.

D  surface structure of fixed cells.

A  fluorescence microscopy

B  bright-field microscopy

C  dark-field microscopy

D  scanning electron microscopy

E  phase-contrast microscopy

A  diameter.

B  size

C  light penetration

D  length.

A  the same

B  no relationship on

C  higher

D  lower

A  differential interference contrast microscope

B  brightfield microscope

C  darkfield microscope

D  electron microscope

A  light with an intermediate wavelength

B  light with a short wavelength

C  radio wavelength

D  light with a long wavelength

A  the microscope’s clarity.

B  the microscope’s magnification.

C  the microscope’s resolution.

D  the minimum cell size of a cell.

A  phase contrast microscopy

B  immunofluoresnce

C  bright-field microscopy with staining

D  differential Interference Contrast microscopy

A  phase-contrast

B  transmission electron

C  bright-field

D  scanning electron

E  dark-field

A  nose

B  colon

C  hand

D  throat

A  attaching

B  moving

C  floating

D  reproducing

E  dying

A  peptidoglycan

B  capsule

C  cell wall

D  flagellum

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

B  all of these

C  the production of exotoxins or endotoxins.

D  the presence of anatomical structures such as pili.

A  destroyed the viral nucleic acid

B  prevented the virus from attaching to the host cell

C  prevented the virus from leaving the host cell

D  prevented the virus from entering the host cell

E  none of these are correct

F  more than one of the above is correct

A  more than one of the above is correct

B  none of these are correct

C  cause target cells to mutate

D  cause target cells to cell divide

E  punch holes in target cells

F  cause target cells to function more efficiently

A  chloroplasts

B  flagella

C  endoplasmic reticulum

D  mitochondria

E  more than one of the above is correct

F  nucleus

A  tumbling

B  gliding motility

C  chemotaxis

D  phototaxis

A  starvation

B  oxygen

C  water

D  nutrients

A  move to a new location

B  evade phagocytosis

C  build biofilms

D  evade PAMPS activation

E  damage host cells

A  lipids

B  protein

C  nucleic acids

D  carbohydrates

A  peritrichous

B  monotrichous

C  monotrichous

D  lophotrichous

A  they are used in motility

B  more than one of the above is correct

C  none of these are correct

D  they are used in attachment

E  they can cause antibiotic resistance

F  they are used in DNA exchange

A  thermophiles

B  acidophiles

C  halotolerant

D  barophiles

A  attachment increases motility

B  attachment increases endospore formation

C  attachment increases parasitic damage to the host

D  attachment increases the exchange of genes

A  endospores are more likely to die in nutritionally poor conditions

B  endospores are more resistant to staining

C  endospores are more resistant to temperature changes

D  endospores are more likely to survive treatment with disinfectants

A  plasma membrane

B  axial filament

C  pilum

D  fimbria

A  capsule

B  pore forming toxins

C  pili

D  none of these are correct

E  flagellum

F  more than one of the above is correct