BIOD 171 MICROBIOLOGY LAB 2 EXAM
PORTAGE LEARNING 2026 EXAMPREP VERIFIED
QUESTIONS AND FULL SOLUTIONS
⩥Columbia CNA Agar
Selective:
Differential:
Enriched:
Special cultures: Answer: Selective: Yes
Differential: Yes
Enriched: Yes
Special cultures: Gram-Positive Microbes
⩥Chocolate Agar
Selective:
Differential:
Enriched: Answer: Selective: No
Differential: No
Enriched: Yes
, ⩥NUTRIENTS: Microbial Categories (Carbon and Energy):
1)
2)
3)
4) Answer: 1) Photoautotrophs- Light energy and CO2
2) Photoheterotrophs- Light energy and organic compounds
3) Chemoautotrophs- Chemical energy and CO2
4) Chemoheterotrophs- Chemical energy and organic compounds
⩥NUTRIENTS: Microbial Categories (Oxygen):
1)
2)
3) Answer: 1) Obligate Aerobes: Require O2
2) Obligate Anaerobes: Killed by O2
3) Facultative Anaerobes: Grow better with O2, but can live without it
⩥Other Nutrients (Not for Classification):
1)
2)
3) Answer: 1) Nitrogen
2) Trace elements
3) Growth factors
PORTAGE LEARNING 2026 EXAMPREP VERIFIED
QUESTIONS AND FULL SOLUTIONS
⩥Columbia CNA Agar
Selective:
Differential:
Enriched:
Special cultures: Answer: Selective: Yes
Differential: Yes
Enriched: Yes
Special cultures: Gram-Positive Microbes
⩥Chocolate Agar
Selective:
Differential:
Enriched: Answer: Selective: No
Differential: No
Enriched: Yes
, ⩥NUTRIENTS: Microbial Categories (Carbon and Energy):
1)
2)
3)
4) Answer: 1) Photoautotrophs- Light energy and CO2
2) Photoheterotrophs- Light energy and organic compounds
3) Chemoautotrophs- Chemical energy and CO2
4) Chemoheterotrophs- Chemical energy and organic compounds
⩥NUTRIENTS: Microbial Categories (Oxygen):
1)
2)
3) Answer: 1) Obligate Aerobes: Require O2
2) Obligate Anaerobes: Killed by O2
3) Facultative Anaerobes: Grow better with O2, but can live without it
⩥Other Nutrients (Not for Classification):
1)
2)
3) Answer: 1) Nitrogen
2) Trace elements
3) Growth factors
