Exam 6: Growth and Culturing of Bacteria

A) lysis
B) no change in size
C) swelling of the cell which is contained by the cell wall
D) plasmolysis

Correct Answer

verified

Show Answer

A) incubator
B) colony county
C) spectrophotometer
D) chemostat

Correct Answer

verified

Show Answer

A) selective
B) differential
C) complex
D) enriched

Correct Answer

verified

Show Answer

A) traumatic agent such as low pH or heat damages the coat
B) outgrowth occurs in a medium with adequate nutrients
C) divisions of the endospores early in their development
D) water and nutrients penetrate damaged coat

Correct Answer

verified

Show Answer

A) produced by gram positive rods act in the medium around the organism
B) are released by the golgi apparatus into the cytoplasm where they act
C) produced by gram negative rods act in the periplamic space
D) two of the above

Correct Answer

verified

Show Answer

Correct Answer

verified

Physical factors that could affect the g...

View Answer

Show Answer

A) sexual reproduction
B) binary fission
C) budding
D) homologous recombination

Correct Answer

verified

Show Answer

A) slow down the growth of microbes
B) speed up the growth of microbes
C) obtain bacterial cultures at several different concentrations
D) form bacterial colonies

Correct Answer

verified

Show Answer

A) dragging them across a solid surface
B) dispersing them in liquid media
C) killing off those cells that are not able to survive in hot agar
D) embedding some cells in the agar so that they are exposed to lower concentrations of oxygen

Correct Answer

verified

Show Answer

A) lag
B) log
C) stationary
D) death

Correct Answer

verified

Show Answer

A) obligate aerobe
B) obligate anaerobe
C) facultative anaerobe
D) aerotolerant anaerobe

Correct Answer

verified

Show Answer

A) refers to the increase in the size of a microbial cell
B) refers to the increase in the frequency of cell division
C) in a single generation's time leads to double the cell size
D) in a single generation's time leads to double the number of microbes.

Correct Answer

verified

Show Answer

A) relies on the fact that liquid agar will solidify as it cools
B) is useful for growing microaerophiles
C) results in some organisms growing embedded in the agar
D) all of the above

Correct Answer

verified

Show Answer

A) The number of newly generated cells is greater than the number of dying cells
B) The number of newly generated cells is less than the number of dying cells
C) The number of newly generated cells is the same as the number of dying cells
D) none of the above

Correct Answer

verified

Show Answer

A) agar is used as a solidifying agent in some types of media
B) bacteria growing in a liquid culture will generate colonies
C) a turbid culture is indicative of bacterial growth
D) each bacterium plated will represent a colony-forming unit

Correct Answer

verified

Show Answer

A) both chocolate agar and blood agar contain blood
B) stock cultures are never directly used for laboratory studies
C) a differential media will allow some bacteria to grow and stop the growth of others
D) a selective media will suppress the growth of some microbes

Correct Answer

verified

Show Answer

A) sugar
B) alcohol
C) salt
D) phosphorous

Correct Answer

verified

Show Answer

A) are rare
B) can be identified based on their DNA
C) can only be seen on selective agar plates
D) have defined generation times

Correct Answer

verified

Show Answer