Lecture Exam 2

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

B  an organism that is killed by oxygen

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

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

A  mesophile â growth at 0°C

B  psychrophile â growth at 15°C

C  thermophile â growth at 50°C

D  hyperthermophiles â growth at 85°C

A  low pH, but survive at high pH.

B  high pH, but survive at low pH.

C  pH 7.0, but survive at low pH.

D  only at low pH.

E  only at high pH.

A  obligate anaerobes

B  alkaliphiles

C  neutrophiles

D  facultative anaerobes

A  survival

B  reproduction

C  storage

D  protein synthesis

A  thermophiles

B  mesophiles

C  halophiles

D  psychrophiles

A  toxic alkaline chemicals

B  naturally occurring antibiotics

C  low pH

D  low water activity

A  halophiles

B  psychrophiles

C  thermophiles

D  mesophiles

A  hyperthermophiles

B  thermophiles

C  psychrotrophs

D  mesophiles

A  thermophile

B  mesophile

C  acidophile

D  psychrophile

A  that they grow well at high pH

B  that they grow well at low oxygen

C  that they grow well at low oxygen

D  that they grow well at high pressure

E  that they grow well at low pH

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

C  none of these

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  osmotolerant.

B  facultative anaerobe

C  aerotolerant anaerobe.

D  obligate aerobe.

E  acidophile.

A  they lack the correct nucleus

B  they lack the correct pH

C  they lack the correct enzymes

D  they lack the correct salt concentration

E  they lack the correct atmospheric pressure

A  a chemoheterotroph

B  a chemotroph

C  a heterotroph

D  a phototroph

A  scanning electron microscopy

B  dark-field microscopy

C  phase-contrast microscopy

D  bright-field microscopy

E  fluorescence microscopy

A  phase contrast microscope

B  electron microscope

C  fluorescent microscope

D  compound light microscope

E  darkfield microscope

A  phase-contrast

B  transmission electron

C  dark-field

D  bright-field

E  scanning electron

A  length.

B  diameter.

C  light penetration

D  size

A  the microscope’s resolution.

B  the minimum cell size of a cell.

C  the microscope’s magnification.

D  the microscope’s clarity.

A  scanning electron microscopy

B  differential interference contrast (DIC)

C  darkfield microscopy

D  UV microscopy

E  brightfield microscopy

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  dark bacteria on a dark background.

B  bright bacteria on a bright background.

C  fluorescent bacteria on a dark background.

D  bright bacteria on a dark background.

E  dark bacteria on a bright background.

A  higher

B  no relationship on

C  lower

D  the same

A  axial filament

B  fimbria

C  pilum

D  plasma membrane

A  log phase

B  death phase

C  lag phase

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

A  more than one of the answers are correct

B  none of these are correct

C  they are used in attachment

D  they are used in DNA exchange

E  they can cause antibiotic resistance

F  they are used in motility

A  peritrichous

B  lophotrichous

C  monotrichous

D  monotrichous

A  the presence of anatomical structures such as pili.

B  the production of exotoxins or endotoxins.

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

D  all of these

A  halotolerant

B  acidophiles

C  barophiles

D  thermophiles

A  colony formation

B  nutrient surplus

C  adverse environmental stress

D  need for reproduction

A  attachments

B  hormones

C  adhesins

D  phagocytosins

A  attachment increases parasitic damage to the host

B  attachment increases motility

C  attachment increases endospore formation

D  attachment increases the exchange of genes

A  a nucleus

B  chlorophyll

C  plasmids

D  ribosomes

A  selectively permeable

B  composed of a phospholipid bilayer

C  outermost living part of bacterial cell

D  maintains cell shape

E  contains proteins