Lecture Exam 2

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

B  an organism that is killed by oxygen

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

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

A  mesophile â growth at 0°C

B  hyperthermophiles â growth at 85°C

C  thermophile â growth at 50°C

D  psychrophile â growth at 15°C

A  low pH, but survive at high pH.

B  pH 7.0, but survive at low pH.

C  high pH, but survive at low pH.

D  only at high pH.

E  only at low pH.

A  neutrophiles

B  alkaliphiles

C  facultative anaerobes

D  obligate anaerobes

A  survival

B  reproduction

C  protein synthesis

D  storage

A  thermophiles

B  mesophiles

C  psychrophiles

D  halophiles

A  toxic alkaline chemicals

B  low pH

C  naturally occurring antibiotics

D  low water activity

A  halophiles

B  mesophiles

C  psychrophiles

D  thermophiles

A  hyperthermophiles

B  thermophiles

C  mesophiles

D  psychrotrophs

A  mesophile

B  psychrophile

C  thermophile

D  acidophile

A  that they grow well at low oxygen

B  that they grow well at low oxygen

C  that they grow well at low pH

D  that they grow well at high pH

E  that they grow well at high pressure

A  none of these

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 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  aerotolerant anaerobe.

B  facultative anaerobe

C  osmotolerant.

D  obligate aerobe.

E  acidophile.

A  they lack the correct enzymes

B  they lack the correct salt concentration

C  they lack the correct nucleus

D  they lack the correct pH

E  they lack the correct atmospheric pressure

A  a phototroph

B  a chemotroph

C  a chemoheterotroph

D  a heterotroph

A  scanning electron microscopy

B  fluorescence microscopy

C  bright-field microscopy

D  phase-contrast microscopy

E  dark-field microscopy

A  fluorescent microscope

B  compound light microscope

C  phase contrast microscope

D  electron microscope

E  darkfield microscope

A  scanning electron

B  dark-field

C  transmission electron

D  bright-field

E  phase-contrast

A  diameter.

B  size

C  length.

D  light penetration

A  the microscope’s resolution.

B  the minimum cell size of a cell.

C  the microscope’s magnification.

D  the microscope’s clarity.

A  darkfield microscopy

B  brightfield microscopy

C  scanning electron microscopy

D  UV microscopy

E  differential interference contrast (DIC)

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  bright bacteria on a dark background.

B  dark bacteria on a dark background.

C  dark bacteria on a bright background.

D  fluorescent bacteria on a dark background.

E  bright bacteria on a bright background.

A  the same

B  no relationship on

C  higher

D  lower

A  pilum

B  axial filament

C  plasma membrane

D  fimbria

A  death phase

B  lag phase

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

D  log phase

A  they can cause antibiotic resistance

B  none of these are correct

C  more than one of the answers are correct

D  they are used in DNA exchange

E  they are used in attachment

F  they are used in motility

A  lophotrichous

B  monotrichous

C  monotrichous

D  peritrichous

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  thermophiles

B  halotolerant

C  acidophiles

D  barophiles

A  need for reproduction

B  adverse environmental stress

C  nutrient surplus

D  colony formation

A  adhesins

B  attachments

C  hormones

D  phagocytosins

A  attachment increases parasitic damage to the host

B  attachment increases the exchange of genes

C  attachment increases endospore formation

D  attachment increases motility

A  plasmids

B  chlorophyll

C  ribosomes

D  a nucleus

A  maintains cell shape

B  composed of a phospholipid bilayer

C  selectively permeable

D  contains proteins

E  outermost living part of bacterial cell