Lecture Exam 2

A  an organism that is killed by oxygen

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

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  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 high pH.

C  pH 7.0, but survive at low pH.

D  only at low pH.

E  high pH, but survive at low pH.

A  obligate anaerobes

B  neutrophiles

C  facultative anaerobes

D  alkaliphiles

A  protein synthesis

B  reproduction

C  storage

D  survival

A  halophiles

B  thermophiles

C  psychrophiles

D  mesophiles

A  low pH

B  naturally occurring antibiotics

C  toxic alkaline chemicals

D  low water activity

A  thermophiles

B  psychrophiles

C  halophiles

D  mesophiles

A  hyperthermophiles

B  psychrotrophs

C  thermophiles

D  mesophiles

A  mesophile

B  psychrophile

C  thermophile

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 oxygen

D  that they grow well at low oxygen

E  that they grow well at low pH

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

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 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  none of these

A  acidophile.

B  facultative anaerobe

C  aerotolerant anaerobe.

D  obligate aerobe.

E  osmotolerant.

A  they lack the correct atmospheric pressure

B  they lack the correct enzymes

C  they lack the correct salt concentration

D  they lack the correct pH

E  they lack the correct nucleus

A  a chemoheterotroph

B  a phototroph

C  a heterotroph

D  a chemotroph

A  scanning electron microscopy

B  phase-contrast microscopy

C  fluorescence microscopy

D  dark-field microscopy

E  bright-field microscopy

A  darkfield microscope

B  compound light microscope

C  electron microscope

D  phase contrast microscope

E  fluorescent microscope

A  dark-field

B  transmission electron

C  bright-field

D  phase-contrast

E  scanning electron

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  brightfield microscopy

B  scanning electron microscopy

C  darkfield microscopy

D  UV microscopy

E  differential interference contrast (DIC)

A  surface structure of fixed cells.

B  surface membranes of live, living cells.

C  internal structure of live, living cells.

D  internal structure of fixed cells.

A  bright bacteria on a dark background.

B  fluorescent bacteria on a dark background.

C  bright bacteria on a bright background.

D  dark bacteria on a bright background.

E  dark bacteria on a dark background.

A  the same

B  higher

C  lower

D  no relationship on

A  pilum

B  fimbria

C  plasma membrane

D  axial filament

A  death phase

B  log 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 can cause antibiotic resistance

D  they are used in DNA exchange

E  they are used in motility

F  they are used in attachment

A  monotrichous

B  monotrichous

C  peritrichous

D  lophotrichous

A  the presence of anatomical structures such as pili.

B  all of these

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

D  the production of exotoxins or endotoxins.

A  barophiles

B  acidophiles

C  thermophiles

D  halotolerant

A  adverse environmental stress

B  colony formation

C  nutrient surplus

D  need for reproduction

A  adhesins

B  phagocytosins

C  attachments

D  hormones

A  attachment increases endospore formation

B  attachment increases motility

C  attachment increases parasitic damage to the host

D  attachment increases the exchange of genes

A  ribosomes

B  chlorophyll

C  a nucleus

D  plasmids

A  contains proteins

B  composed of a phospholipid bilayer

C  selectively permeable

D  maintains cell shape

E  outermost living part of bacterial cell