Microbiology Quiz- CH 6

What cell structure regulates the passage of substances into and out of the cell?

• cell wall

• mitochondrion

• cytoplasm

• cytoplasmic membrane

Tags

NGSS.MS-LS1-2

Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures, pH, and atmospheric gases.

• True

• False

Tags

NGSS.MS-LS1-5

Identify highly reactive, toxic byproducts of oxygen metabolism.

• OH-

• H2O

• O2-

• O2

• H2O2

Tags

NGSS.HS-LS1-7

To obligate anaerobes, oxygen is _____ and _____.

• toxic

• not used

• inert

• nutritional

Tags

NGSS.HS-LS2-3

Which enzyme converts hydrogen peroxide, formed in aerobic respiration, to water and oxygen?

• Dismutase

• Polymerase

• Catalase

A microbe's _____ temperature covers a small range that promotes the fastest rate of growth and metabolism.

• minimum

• optimum

• maximum

Any microorganism that grows best in the absence of oxygen is a(n) _____. (one word)

• aerobe

• anaerobe

• facultative anaerobe

• microaerophile

Tags

NGSS.HS-LS2-3

Which of the following are toxic to obligate anaerobes?

• Carbon dioxide (CO2)

• Molecular oxygen (O2)

• Superoxide ion (O2-)

• Hydrogen peroxide (H2O2)

• Hydroxyl radical (OH-)

Tags

NGSS.HS-LS2-3

Oxygen is toxic to obligate anaerobes because these organisms lack the enzymes to degrade toxic products of aerobic metabolism.

• True

• False

Tags

NGSS.HS-LS2-3

What word is used to describe organisms which do NOT use oxygen in their cellular respiration pathways?

• Passive aerobes

• Anaerobic

• Aerobic

• Oxygen neutral

Tags

NGSS.HS-LS2-3