Lecture Exam 2

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

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

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

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  pH 7.0, but survive at low pH.

B  low pH, but survive at high pH.

C  only at high pH.

D  high pH, but survive at low pH.

E  only at low pH.

A  neutrophiles

B  obligate anaerobes

C  facultative anaerobes

D  alkaliphiles

A  survival

B  reproduction

C  protein synthesis

D  storage

A  psychrophiles

B  thermophiles

C  mesophiles

D  halophiles

A  low water activity

B  toxic alkaline chemicals

C  naturally occurring antibiotics

D  low pH

A  mesophiles

B  halophiles

C  psychrophiles

D  thermophiles

A  psychrotrophs

B  thermophiles

C  mesophiles

D  hyperthermophiles

A  mesophile

B  thermophile

C  psychrophile

D  acidophile

A  that they grow well at high pH

B  that they grow well at high pressure

C  that they grow well at low pH

D  that they grow well at low oxygen

E  that they grow well at low oxygen

A  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.

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

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

D  none of these

A  aerotolerant anaerobe.

B  osmotolerant.

C  obligate aerobe.

D  acidophile.

E  facultative anaerobe

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 heterotroph

B  a chemotroph

C  a phototroph

D  a chemoheterotroph

A  fluorescence microscopy

B  scanning electron microscopy

C  bright-field microscopy

D  dark-field microscopy

E  phase-contrast microscopy

A  compound light microscope

B  phase contrast microscope

C  electron microscope

D  darkfield microscope

E  fluorescent 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 microscope’s clarity.

C  the minimum cell size of a cell.

D  the microscope’s magnification.

A  darkfield microscopy

B  differential interference contrast (DIC)

C  brightfield microscopy

D  UV microscopy

E  scanning electron microscopy

A  surface structure of fixed cells.

B  internal structure of live, living cells.

C  internal structure of fixed cells.

D  surface membranes of live, living cells.

A  dark bacteria on a dark background.

B  dark bacteria on a bright background.

C  bright bacteria on a bright background.

D  bright bacteria on a dark background.

E  fluorescent bacteria on a dark background.

A  lower

B  higher

C  the same

D  no relationship on

A  fimbria

B  pilum

C  plasma membrane

D  axial filament

A  log phase

B  death phase

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

D  lag phase

A  they are used in DNA exchange

B  more than one of the answers are correct

C  none of these are correct

D  they are used in motility

E  they are used in attachment

F  they can cause antibiotic resistance

A  peritrichous

B  monotrichous

C  lophotrichous

D  monotrichous

A  all of these

B  the production of exotoxins or endotoxins.

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

D  the presence of anatomical structures such as pili.

A  thermophiles

B  halotolerant

C  acidophiles

D  barophiles

A  adverse environmental stress

B  nutrient surplus

C  colony formation

D  need for reproduction

A  adhesins

B  phagocytosins

C  hormones

D  attachments

A  attachment increases motility

B  attachment increases parasitic damage to the host

C  attachment increases the exchange of genes

D  attachment increases endospore formation

A  plasmids

B  chlorophyll

C  a nucleus

D  ribosomes

A  outermost living part of bacterial cell

B  selectively permeable

C  composed of a phospholipid bilayer

D  maintains cell shape

E  contains proteins