Lecture Exam 2

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

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

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

D  an organism that is killed by oxygen

A  hyperthermophiles â growth at 85°C

B  thermophile â growth at 50°C

C  mesophile â growth at 0°C

D  psychrophile â growth at 15°C

A  low pH, but survive at high pH.

B  pH 7.0, but survive at low pH.

C  high pH, but survive at low pH.

D  only at low pH.

E  only at high pH.

A  obligate anaerobes

B  neutrophiles

C  alkaliphiles

D  facultative anaerobes

A  storage

B  survival

C  protein synthesis

D  reproduction

A  halophiles

B  mesophiles

C  thermophiles

D  psychrophiles

A  naturally occurring antibiotics

B  toxic alkaline chemicals

C  low pH

D  low water activity

A  thermophiles

B  psychrophiles

C  halophiles

D  mesophiles

A  psychrotrophs

B  mesophiles

C  thermophiles

D  hyperthermophiles

A  psychrophile

B  mesophile

C  acidophile

D  thermophile

A  that they grow well at high pressure

B  that they grow well at low pH

C  that they grow well at low oxygen

D  that they grow well at high pH

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  none of these

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

A  obligate aerobe.

B  aerotolerant anaerobe.

C  facultative anaerobe

D  osmotolerant.

E  acidophile.

A  they lack the correct salt concentration

B  they lack the correct enzymes

C  they lack the correct nucleus

D  they lack the correct atmospheric pressure

E  they lack the correct pH

A  a chemoheterotroph

B  a phototroph

C  a chemotroph

D  a heterotroph

A  bright-field microscopy

B  fluorescence microscopy

C  scanning electron microscopy

D  dark-field microscopy

E  phase-contrast microscopy

A  compound light microscope

B  fluorescent microscope

C  darkfield microscope

D  electron microscope

E  phase contrast microscope

A  dark-field

B  scanning electron

C  transmission electron

D  bright-field

E  phase-contrast

A  diameter.

B  light penetration

C  size

D  length.

A  the microscope’s clarity.

B  the microscope’s resolution.

C  the microscope’s magnification.

D  the minimum cell size of a cell.

A  darkfield microscopy

B  scanning electron microscopy

C  UV microscopy

D  brightfield microscopy

E  differential interference contrast (DIC)

A  internal structure of live, living cells.

B  internal structure of fixed cells.

C  surface membranes of live, living cells.

D  surface structure of fixed cells.

A  bright bacteria on a dark background.

B  fluorescent bacteria on a dark background.

C  dark bacteria on a bright background.

D  bright bacteria on a bright background.

E  dark bacteria on a dark background.

A  the same

B  higher

C  lower

D  no relationship on

A  axial filament

B  pilum

C  plasma membrane

D  fimbria

A  log phase

B  lag phase

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

D  death phase

A  they are used in attachment

B  they are used in DNA exchange

C  none of these are correct

D  they are used in motility

E  they can cause antibiotic resistance

F  more than one of the answers are correct

A  monotrichous

B  monotrichous

C  lophotrichous

D  peritrichous

A  the production of exotoxins or endotoxins.

B  the presence of anatomical structures such as pili.

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

D  all of these

A  barophiles

B  thermophiles

C  halotolerant

D  acidophiles

A  nutrient surplus

B  colony formation

C  adverse environmental stress

D  need for reproduction

A  phagocytosins

B  adhesins

C  attachments

D  hormones

A  attachment increases the exchange of genes

B  attachment increases motility

C  attachment increases endospore formation

D  attachment increases parasitic damage to the host

A  chlorophyll

B  plasmids

C  ribosomes

D  a nucleus

A  contains proteins

B  selectively permeable

C  outermost living part of bacterial cell

D  maintains cell shape

E  composed of a phospholipid bilayer