BIOD 171 Module 4 Exam UPDATED
Questions and CORRECT Answers
necessary for growth and survival - CORRECT ANSWER✔✔- nutrients, temp, pH
CO2 and Light - CORRECT ANSWER✔✔- photoautotroph
CO2 and Chemicals - CORRECT ANSWER✔✔- chemoautotroph
Organic Compounds and Light - CORRECT ANSWER✔✔- photoheterotroph
Organic Compounds and Chemicals - CORRECT ANSWER✔✔- chemoheterotroph
obligate aerobes - CORRECT ANSWER✔✔- require O2
settle at the top of test tube
Obligate anaerobes - CORRECT ANSWER✔✔- killed by O2
settle at the bottom of test tube
faculative anaerobes - CORRECT ANSWER✔✔- grows better with O2 but can live without
O2
more concentrated at the top of test tube
nirtogen is a... - CORRECT ANSWER✔✔- growth-inhibiting nutrient
trace elements - CORRECT ANSWER✔✔- need in minuscule amounts to support
metabolism
growth factors - CORRECT ANSWER✔✔- organic chemicals needed in small quantities to
support metabolism
, ex: AA, cholesterol, heme, NADH
thermophile - CORRECT ANSWER✔✔- HOT
>45 C
mesophile - CORRECT ANSWER✔✔- medium
20-40 C
cause most human diseases and infections bc body temp is 37 C
psychophile - CORRECT ANSWER✔✔- cold!!
<15 C
can survive refrigeration and spoil food
more H+ = more ___ - CORRECT ANSWER✔✔- acidic
acidophile - CORRECT ANSWER✔✔- 0-6 pH
neutrophile - CORRECT ANSWER✔✔- 6.5-7.5 pH
alkalinophile - CORRECT ANSWER✔✔- 7-11.5 pH
inoculum - CORRECT ANSWER✔✔- sample of the microbe
medium - CORRECT ANSWER✔✔- liquid or solid
culture - CORRECT ANSWER✔✔- microbes grown in the media or the process
colonies - CORRECT ANSWER✔✔- cluster of cells arising from 1 parent cell
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