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  hyperthermophiles â growth at 85°C

C  mesophile â growth at 0°C

D  psychrophile â growth at 15°C

A  only 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  low pH, but survive at high pH.

A  obligate anaerobes

B  alkaliphiles

C  neutrophiles

D  facultative anaerobes

A  survival

B  storage

C  reproduction

D  protein synthesis

A  halophiles

B  mesophiles

C  thermophiles

D  psychrophiles

A  low water activity

B  low pH

C  naturally occurring antibiotics

D  toxic alkaline chemicals

A  psychrophiles

B  mesophiles

C  thermophiles

D  halophiles

A  thermophiles

B  mesophiles

C  hyperthermophiles

D  psychrotrophs

A  acidophile

B  mesophile

C  thermophile

D  psychrophile

A  that they grow well at low oxygen

B  that they grow well at high pH

C  that they grow well at high pressure

D  that they grow well at low 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  none of these

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

A  acidophile.

B  aerotolerant anaerobe.

C  osmotolerant.

D  obligate aerobe.

E  facultative anaerobe

A  they lack the correct atmospheric pressure

B  they lack the correct nucleus

C  they lack the correct pH

D  they lack the correct enzymes

E  they lack the correct salt concentration

A  a chemoheterotroph

B  a heterotroph

C  a chemotroph

D  a phototroph

A  dark-field microscopy

B  phase-contrast microscopy

C  fluorescence microscopy

D  bright-field microscopy

E  scanning electron microscopy

A  fluorescent microscope

B  electron microscope

C  darkfield microscope

D  compound light microscope

E  phase contrast microscope

A  phase-contrast

B  bright-field

C  transmission electron

D  scanning electron

E  dark-field

A  length.

B  diameter.

C  light penetration

D  size

A  the microscope’s clarity.

B  the microscope’s resolution.

C  the microscope’s magnification.

D  the minimum cell size of a cell.

A  brightfield microscopy

B  darkfield microscopy

C  differential interference contrast (DIC)

D  scanning electron microscopy

E  UV 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  bright bacteria on a bright background.

B  dark bacteria on a bright background.

C  bright bacteria on a dark background.

D  dark bacteria on a dark background.

E  fluorescent bacteria on a dark background.

A  higher

B  the same

C  no relationship on

D  lower

A  plasma membrane

B  fimbria

C  axial filament

D  pilum

A  lag phase

B  death phase

C  log phase

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

A  they are used in motility

B  they are used in DNA exchange

C  more than one of the answers are correct

D  they can cause antibiotic resistance

E  they are used in attachment

F  none of these are correct

A  monotrichous

B  lophotrichous

C  monotrichous

D  peritrichous

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

B  the production of exotoxins or endotoxins.

C  the presence of anatomical structures such as pili.

D  all of these

A  acidophiles

B  halotolerant

C  thermophiles

D  barophiles

A  nutrient surplus

B  adverse environmental stress

C  need for reproduction

D  colony formation

A  hormones

B  attachments

C  phagocytosins

D  adhesins

A  attachment increases parasitic damage to the host

B  attachment increases the exchange of genes

C  attachment increases motility

D  attachment increases endospore formation

A  a nucleus

B  ribosomes

C  plasmids

D  chlorophyll

A  selectively permeable

B  composed of a phospholipid bilayer

C  contains proteins

D  outermost living part of bacterial cell

E  maintains cell shape