Lecture Exam 2

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

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

C  an organism that is killed by oxygen

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

A  psychrophile â growth at 15°C

B  mesophile â growth at 0°C

C  thermophile â growth at 50°C

D  hyperthermophiles â growth at 85°C

A  pH 7.0, but survive at low pH.

B  only at high pH.

C  low pH, but survive at high pH.

D  high pH, but survive at low pH.

E  only at low pH.

A  obligate anaerobes

B  alkaliphiles

C  neutrophiles

D  facultative anaerobes

A  protein synthesis

B  storage

C  reproduction

D  survival

A  psychrophiles

B  mesophiles

C  thermophiles

D  halophiles

A  toxic alkaline chemicals

B  naturally occurring antibiotics

C  low water activity

D  low pH

A  psychrophiles

B  mesophiles

C  thermophiles

D  halophiles

A  hyperthermophiles

B  mesophiles

C  thermophiles

D  psychrotrophs

A  mesophile

B  acidophile

C  thermophile

D  psychrophile

A  that they grow well at high pressure

B  that they grow well at low oxygen

C  that they grow well at low oxygen

D  that they grow well at high pH

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  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  aerotolerant anaerobe.

B  obligate aerobe.

C  facultative anaerobe

D  osmotolerant.

E  acidophile.

A  they lack the correct atmospheric pressure

B  they lack the correct pH

C  they lack the correct enzymes

D  they lack the correct salt concentration

E  they lack the correct nucleus

A  a chemoheterotroph

B  a chemotroph

C  a phototroph

D  a heterotroph

A  scanning electron microscopy

B  phase-contrast microscopy

C  dark-field microscopy

D  bright-field microscopy

E  fluorescence microscopy

A  electron microscope

B  compound light microscope

C  darkfield microscope

D  fluorescent microscope

E  phase contrast microscope

A  dark-field

B  scanning electron

C  transmission electron

D  bright-field

E  phase-contrast

A  diameter.

B  length.

C  light penetration

D  size

A  the microscope’s clarity.

B  the minimum cell size of a cell.

C  the microscope’s resolution.

D  the microscope’s magnification.

A  differential interference contrast (DIC)

B  UV microscopy

C  darkfield microscopy

D  scanning electron microscopy

E  brightfield microscopy

A  internal structure of live, living cells.

B  surface membranes of live, living cells.

C  internal structure of fixed cells.

D  surface structure of fixed cells.

A  dark bacteria on a bright background.

B  fluorescent bacteria on a dark background.

C  bright bacteria on a bright background.

D  bright bacteria on a dark background.

E  dark bacteria on a dark background.

A  the same

B  lower

C  higher

D  no relationship on

A  fimbria

B  axial filament

C  pilum

D  plasma membrane

A  log phase

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

C  lag phase

D  death phase

A  they are used in DNA exchange

B  they are used in attachment

C  they can cause antibiotic resistance

D  none of these are correct

E  more than one of the answers are correct

F  they are used in motility

A  monotrichous

B  lophotrichous

C  peritrichous

D  monotrichous

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  halotolerant

B  thermophiles

C  acidophiles

D  barophiles

A  need for reproduction

B  colony formation

C  adverse environmental stress

D  nutrient surplus

A  adhesins

B  hormones

C  phagocytosins

D  attachments

A  attachment increases motility

B  attachment increases endospore formation

C  attachment increases the exchange of genes

D  attachment increases parasitic damage to the host

A  chlorophyll

B  a nucleus

C  ribosomes

D  plasmids

A  maintains cell shape

B  composed of a phospholipid bilayer

C  outermost living part of bacterial cell

D  selectively permeable

E  contains proteins