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 doesn’t use oxygen but tolerates it

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

A  thermophile â growth at 50°C

B  mesophile â growth at 0°C

C  psychrophile â growth at 15°C

D  hyperthermophiles â growth at 85°C

A  only at high pH.

B  pH 7.0, but survive at low pH.

C  high pH, but survive at low pH.

D  low pH, but survive at high pH.

E  only at low pH.

A  alkaliphiles

B  neutrophiles

C  obligate anaerobes

D  facultative anaerobes

A  protein synthesis

B  storage

C  reproduction

D  survival

A  halophiles

B  mesophiles

C  thermophiles

D  psychrophiles

A  low water activity

B  low pH

C  toxic alkaline chemicals

D  naturally occurring antibiotics

A  thermophiles

B  halophiles

C  psychrophiles

D  mesophiles

A  hyperthermophiles

B  thermophiles

C  psychrotrophs

D  mesophiles

A  acidophile

B  mesophile

C  thermophile

D  psychrophile

A  that they grow well at low oxygen

B  that they grow well at high pressure

C  that they grow well at high pH

D  that they grow well at low oxygen

E  that they grow well at low pH

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  osmotolerant.

B  facultative anaerobe

C  obligate aerobe.

D  aerotolerant anaerobe.

E  acidophile.

A  they lack the correct enzymes

B  they lack the correct pH

C  they lack the correct salt concentration

D  they lack the correct nucleus

E  they lack the correct atmospheric pressure

A  a chemoheterotroph

B  a chemotroph

C  a phototroph

D  a heterotroph

A  bright-field microscopy

B  scanning electron microscopy

C  dark-field microscopy

D  phase-contrast microscopy

E  fluorescence microscopy

A  phase contrast microscope

B  compound light microscope

C  fluorescent microscope

D  electron microscope

E  darkfield microscope

A  transmission electron

B  bright-field

C  phase-contrast

D  dark-field

E  scanning electron

A  diameter.

B  size

C  light penetration

D  length.

A  the microscope’s clarity.

B  the microscope’s resolution.

C  the minimum cell size of a cell.

D  the microscope’s magnification.

A  UV microscopy

B  darkfield microscopy

C  scanning electron microscopy

D  brightfield microscopy

E  differential interference contrast (DIC)

A  internal structure of fixed cells.

B  internal structure of live, living cells.

C  surface structure of fixed cells.

D  surface membranes of live, living cells.

A  dark bacteria on a bright background.

B  dark bacteria on a dark background.

C  bright bacteria on a bright background.

D  bright bacteria on a dark background.

E  fluorescent bacteria on a dark background.

A  higher

B  no relationship on

C  lower

D  the same

A  pilum

B  plasma membrane

C  fimbria

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  they can cause antibiotic resistance

B  none of these are correct

C  they are used in motility

D  they are used in attachment

E  more than one of the answers are correct

F  they are used in DNA exchange

A  lophotrichous

B  monotrichous

C  monotrichous

D  peritrichous

A  all of these

B  the presence of anatomical structures such as pili.

C  the production of exotoxins or endotoxins.

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

A  barophiles

B  halotolerant

C  acidophiles

D  thermophiles

A  nutrient surplus

B  colony formation

C  need for reproduction

D  adverse environmental stress

A  attachments

B  adhesins

C  phagocytosins

D  hormones

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  a nucleus

B  ribosomes

C  chlorophyll

D  plasmids

A  outermost living part of bacterial cell

B  composed of a phospholipid bilayer

C  contains proteins

D  maintains cell shape

E  selectively permeable