Lecture Exam 2

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

B  an organism that is killed by oxygen

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

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

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  only at low pH.

D  pH 7.0, but survive at low pH.

E  high pH, but survive at low pH.

A  neutrophiles

B  facultative anaerobes

C  alkaliphiles

D  obligate anaerobes

A  storage

B  protein synthesis

C  survival

D  reproduction

A  psychrophiles

B  thermophiles

C  mesophiles

D  halophiles

A  naturally occurring antibiotics

B  low pH

C  toxic alkaline chemicals

D  low water activity

A  psychrophiles

B  mesophiles

C  thermophiles

D  halophiles

A  thermophiles

B  psychrotrophs

C  mesophiles

D  hyperthermophiles

A  mesophile

B  acidophile

C  thermophile

D  psychrophile

A  that they grow well at low oxygen

B  that they grow well at low pH

C  that they grow well at high pressure

D  that they grow well at high pH

E  that they grow well at low oxygen

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

D  none of these

A  facultative anaerobe

B  obligate aerobe.

C  acidophile.

D  osmotolerant.

E  aerotolerant anaerobe.

A  they lack the correct atmospheric pressure

B  they lack the correct pH

C  they lack the correct salt concentration

D  they lack the correct enzymes

E  they lack the correct nucleus

A  a heterotroph

B  a chemotroph

C  a phototroph

D  a chemoheterotroph

A  scanning electron microscopy

B  fluorescence microscopy

C  phase-contrast microscopy

D  dark-field microscopy

E  bright-field microscopy

A  fluorescent microscope

B  electron microscope

C  phase contrast microscope

D  darkfield microscope

E  compound light microscope

A  transmission electron

B  phase-contrast

C  scanning electron

D  bright-field

E  dark-field

A  light penetration

B  length.

C  diameter.

D  size

A  the microscope’s magnification.

B  the microscope’s clarity.

C  the minimum cell size of a cell.

D  the microscope’s resolution.

A  darkfield microscopy

B  UV microscopy

C  scanning electron microscopy

D  differential interference contrast (DIC)

E  brightfield microscopy

A  surface structure of fixed cells.

B  surface membranes of live, living cells.

C  internal structure of fixed cells.

D  internal structure of live, living cells.

A  fluorescent 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  dark bacteria on a dark background.

A  lower

B  the same

C  higher

D  no relationship on

A  pilum

B  plasma membrane

C  fimbria

D  axial filament

A  death phase

B  log phase

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

D  lag phase

A  more than one of the answers are correct

B  they are used in motility

C  they are used in DNA exchange

D  they can cause antibiotic resistance

E  they are used in attachment

F  none of these are correct

A  lophotrichous

B  monotrichous

C  monotrichous

D  peritrichous

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  thermophiles

C  acidophiles

D  halotolerant

A  adverse environmental stress

B  need for reproduction

C  colony formation

D  nutrient surplus

A  attachments

B  hormones

C  adhesins

D  phagocytosins

A  attachment increases parasitic damage to the host

B  attachment increases endospore formation

C  attachment increases the exchange of genes

D  attachment increases motility

A  chlorophyll

B  a nucleus

C  plasmids

D  ribosomes

A  composed of a phospholipid bilayer

B  selectively permeable

C  maintains cell shape

D  contains proteins

E  outermost living part of bacterial cell