Lecture Exam 2

A  a hot vent at pH 1.5

B  human blood at pH 7.2

C  milk at pH 6.5

D  human intestine at pH 8.5

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  storage

C  survival

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 salt concentration

C  they lack the correct nucleus

D  they lack the correct pH

E  they lack the correct enzymes

A  aerotolerant anaerobe.

B  obligate aerobe.

C  osmotolerant.

D  acidophile.

E  facultative anaerobe

A  decline phase

B  exponential or logarithmic phase

C  lag phase

D  stationary phase

A  due to the accumulation of toxic metabolites

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  none of these are correct

A  facultative anaerobes

B  neutrophiles

C  alkaliphiles

D  obligate anaerobes

A  bacterial motility.

B  two of the choices are correct only

C  none of these are correct

D  adherence to certain surfaces.

E  bacterial conjugation.

F  all of these are correct

A  acidophile

B  osmotolerant

C  aerotolerant anaerobe

D  neutrophile

A  none of these are correct

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

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 chemotroph

B  a heterotroph

C  a phototroph

D  a chemoheterotroph

A  thermophile â growth at 50°C

B  mesophile â growth at 0°C

C  psychrophile â growth at 15°C

D  hyperthermophiles â growth at 85°C

A  psychrotrophs

B  mesophiles

C  acidophiles

D  thermophiles

A  an obligate aerobe

B  an aerotolerant anaerobe

C  a facultative anaerobe

D  an obligate anaerobe

A  yogurt cultured at room temperature

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

C  mountain lake with a water temperature of 12 °C

D  contaminated plates left in a 35 °C incubator

A  None of these

B  20-30°C

C  25-40°C

D  >40°C

A  surface membranes of live, living cells.

B  internal structure of live, living cells.

C  internal structure of fixed cells.

D  surface structure of fixed cells.

A  fluorescence microscopy

B  phase-contrast microscopy

C  dark-field microscopy

D  bright-field microscopy

E  scanning electron microscopy

A  length.

B  diameter.

C  size

D  light penetration

A  the same

B  higher

C  lower

D  no relationship on

A  brightfield microscope

B  electron microscope

C  differential interference contrast microscope

D  darkfield microscope

A  radio wavelength

B  light with a short wavelength

C  light with a long wavelength

D  light with an intermediate wavelength

A  the microscope’s resolution.

B  the microscope’s magnification.

C  the microscope’s clarity.

D  the minimum cell size of a cell.

A  bright-field microscopy with staining

B  differential Interference Contrast microscopy

C  immunofluoresnce

D  phase contrast microscopy

A  scanning electron

B  phase-contrast

C  dark-field

D  transmission electron

E  bright-field

A  hand

B  throat

C  colon

D  nose

A  floating

B  attaching

C  moving

D  reproducing

E  dying

A  capsule

B  peptidoglycan

C  cell wall

D  flagellum

A  all of these

B  the presence of anatomical structures such as pili.

C  the production of exotoxins or endotoxins.

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

A  prevented the virus from attaching to the host cell

B  none of these are correct

C  more than one of the above is correct

D  prevented the virus from leaving the host cell

E  prevented the virus from entering the host cell

F  destroyed the viral nucleic acid

A  cause target cells to cell divide

B  punch holes in target cells

C  none of these are correct

D  more than one of the above is correct

E  cause target cells to mutate

F  cause target cells to function more efficiently

A  chloroplasts

B  mitochondria

C  more than one of the above is correct

D  nucleus

E  endoplasmic reticulum

F  flagella

A  tumbling

B  chemotaxis

C  gliding motility

D  phototaxis

A  oxygen

B  starvation

C  nutrients

D  water

A  damage host cells

B  move to a new location

C  build biofilms

D  evade PAMPS activation

E  evade phagocytosis

A  lipids

B  protein

C  carbohydrates

D  nucleic acids

A  monotrichous

B  monotrichous

C  peritrichous

D  lophotrichous

A  they are used in motility

B  they can cause antibiotic resistance

C  more than one of the above is correct

D  none of these are correct

E  they are used in DNA exchange

F  they are used in attachment

A  halotolerant

B  acidophiles

C  barophiles

D  thermophiles

A  attachment increases the exchange of genes

B  attachment increases motility

C  attachment increases endospore formation

D  attachment increases parasitic damage to the host

A  endospores are more resistant to temperature changes

B  endospores are more likely to die in nutritionally poor conditions

C  endospores are more resistant to staining

D  endospores are more likely to survive treatment with disinfectants

A  plasma membrane

B  fimbria

C  pilum

D  axial filament

A  none of these are correct

B  pore forming toxins

C  capsule

D  more than one of the above is correct

E  flagellum

F  pili