Lecture Exam 2

A  an organism that doesn’t use oxygen but tolerates it

B  an organism that uses oxygen when present or grows without oxygen when absent

C  an organism that requires less oxygen than is present in air

D  an organism that is killed by oxygen

A  mesophile â growth at 0°C

B  hyperthermophiles â growth at 85°C

C  psychrophile â growth at 15°C

D  thermophile â growth at 50°C

A  low pH, but survive at high pH.

B  only at low pH.

C  high pH, but survive at low pH.

D  only at high pH.

E  pH 7.0, but survive at low pH.

A  obligate anaerobes

B  neutrophiles

C  facultative anaerobes

D  alkaliphiles

A  storage

B  protein synthesis

C  reproduction

D  survival

A  mesophiles

B  psychrophiles

C  thermophiles

D  halophiles

A  low water activity

B  low pH

C  toxic alkaline chemicals

D  naturally occurring antibiotics

A  thermophiles

B  halophiles

C  mesophiles

D  psychrophiles

A  thermophiles

B  mesophiles

C  hyperthermophiles

D  psychrotrophs

A  thermophile

B  acidophile

C  mesophile

D  psychrophile

A  that they grow well at low oxygen

B  that they grow well at high pH

C  that they grow well at high pressure

D  that they grow well at low pH

E  that they grow well at low oxygen

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

B  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.

C  none of these

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

A  acidophile.

B  osmotolerant.

C  obligate aerobe.

D  facultative anaerobe

E  aerotolerant anaerobe.

A  they lack the correct enzymes

B  they lack the correct pH

C  they lack the correct nucleus

D  they lack the correct salt concentration

E  they lack the correct atmospheric pressure

A  a chemotroph

B  a phototroph

C  a heterotroph

D  a chemoheterotroph

A  phase-contrast microscopy

B  dark-field microscopy

C  bright-field microscopy

D  fluorescence microscopy

E  scanning electron microscopy

A  electron microscope

B  compound light microscope

C  darkfield microscope

D  fluorescent microscope

E  phase contrast microscope

A  transmission electron

B  dark-field

C  scanning electron

D  phase-contrast

E  bright-field

A  light penetration

B  length.

C  diameter.

D  size

A  the microscope’s resolution.

B  the minimum cell size of a cell.

C  the microscope’s clarity.

D  the microscope’s magnification.

A  scanning electron microscopy

B  darkfield microscopy

C  differential interference contrast (DIC)

D  brightfield microscopy

E  UV microscopy

A  surface membranes of live, living cells.

B  internal structure of live, living cells.

C  surface structure of fixed cells.

D  internal structure of fixed cells.

A  fluorescent bacteria on a dark background.

B  bright bacteria on a dark background.

C  dark bacteria on a bright background.

D  dark bacteria on a dark background.

E  bright bacteria on a bright background.

A  lower

B  the same

C  no relationship on

D  higher

A  pilum

B  axial filament

C  plasma membrane

D  fimbria

A  lag phase

B  log, lag, and death phases would all have roughly the same number of endospores.

C  death phase

D  log phase

A  none of these are correct

B  more than one of the answers are correct

C  they are used in attachment

D  they can cause antibiotic resistance

E  they are used in DNA exchange

F  they are used in motility

A  peritrichous

B  monotrichous

C  lophotrichous

D  monotrichous

A  the production of exotoxins or endotoxins.

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

C  all of these

D  the presence of anatomical structures such as pili.

A  thermophiles

B  halotolerant

C  acidophiles

D  barophiles

A  nutrient surplus

B  colony formation

C  need for reproduction

D  adverse environmental stress

A  phagocytosins

B  hormones

C  attachments

D  adhesins

A  attachment increases parasitic damage to the host

B  attachment increases endospore formation

C  attachment increases motility

D  attachment increases the exchange of genes

A  plasmids

B  a nucleus

C  chlorophyll

D  ribosomes

A  outermost living part of bacterial cell

B  composed of a phospholipid bilayer

C  selectively permeable

D  maintains cell shape

E  contains proteins