Exam 2: BIOS 242/ BIOS242 Fundamentals of
Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
A recently discovered new species of microorganism which does not use oxygen in its
metabolism was discovered growing in pH 10, in hot springs, green in color and uses CO2 as
source of carbon nutrient rich soil. Describe in detail the nutritional and physical requirements
for this organism to grow, listing and explaining at least five characteristics.
Does not use O2 - anaerobepH 10/lives in hot springs - alkalinophileLives in hot springs -
thermophileGreen in color - photoautotroph/photoheterotrophuses CO2 (inorganic) form of
carbon - autotroph/phototroph
Compare and contrast the aerobic respiration and fermentation in terms of pathways found in
each, substrates, products, ATP amount and their cellular location in microorganisms.
Aerobic Respiration1) Glycolysis-Yields 2 ATP-1 glucose molecule yields 2 pyruvates (carbon
source)-2 H2Os are produced2)Krebs Cylce- yields 2 ATPs/1 pyruvate - there were 2 pyruvates
so 4 ATPs yielded-6 CO2s are yielded (3 CO2/1 pyruvate)-2 H2Os consumed3)Electron
Transport SystemOxygen is the electron acceptor- yields 34 ATPs- yields 6 CO2- yields 6 H2O
molecules- 6 O2 molecules consumedTotal: 36-38 ATPs yielded- yields 6 CO2- yields 6 H2O
molecules- 6 O2 molecules consumedFermentation:Is the incomplete oxidation of glucose or
other carbohydrates without oxygen. Uses organic compounds like carbon and hydrogen as the
terminal electron acceptor that results in a product of alchohol/acid. Yields only a small amount
of ATP. Still goes through glycolysis.
Describe modes of action of 5 major groups of antimicrobial drugs and provide two examples of
each mode.
•Inhibition of cell wall synthesis
Penicillin targets the cell wall
, Exam 2: BIOS 242/ BIOS242 Fundamentals of
Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
Cephalosporins target the cell wall
•Inhibition of nucleic acid (DNA and RNA) structure and function
Fluoroquinolones
Rifamycin
•Inhibition of protein synthesis
Tetracyclines target protein synthesis
Erythromycin: broad spectrum, low toxicity - blocks protein synthesis by attaching to the
ribosome
•Interference with cell membrane structure or function
Polymyxins:
Daptomycin:
•Inhibition of folic acid synthesis
Sulfa drugs
Sulfonamides
The complete destrustion of microbes is called
steralization
Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
A recently discovered new species of microorganism which does not use oxygen in its
metabolism was discovered growing in pH 10, in hot springs, green in color and uses CO2 as
source of carbon nutrient rich soil. Describe in detail the nutritional and physical requirements
for this organism to grow, listing and explaining at least five characteristics.
Does not use O2 - anaerobepH 10/lives in hot springs - alkalinophileLives in hot springs -
thermophileGreen in color - photoautotroph/photoheterotrophuses CO2 (inorganic) form of
carbon - autotroph/phototroph
Compare and contrast the aerobic respiration and fermentation in terms of pathways found in
each, substrates, products, ATP amount and their cellular location in microorganisms.
Aerobic Respiration1) Glycolysis-Yields 2 ATP-1 glucose molecule yields 2 pyruvates (carbon
source)-2 H2Os are produced2)Krebs Cylce- yields 2 ATPs/1 pyruvate - there were 2 pyruvates
so 4 ATPs yielded-6 CO2s are yielded (3 CO2/1 pyruvate)-2 H2Os consumed3)Electron
Transport SystemOxygen is the electron acceptor- yields 34 ATPs- yields 6 CO2- yields 6 H2O
molecules- 6 O2 molecules consumedTotal: 36-38 ATPs yielded- yields 6 CO2- yields 6 H2O
molecules- 6 O2 molecules consumedFermentation:Is the incomplete oxidation of glucose or
other carbohydrates without oxygen. Uses organic compounds like carbon and hydrogen as the
terminal electron acceptor that results in a product of alchohol/acid. Yields only a small amount
of ATP. Still goes through glycolysis.
Describe modes of action of 5 major groups of antimicrobial drugs and provide two examples of
each mode.
•Inhibition of cell wall synthesis
Penicillin targets the cell wall
, Exam 2: BIOS 242/ BIOS242 Fundamentals of
Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
Cephalosporins target the cell wall
•Inhibition of nucleic acid (DNA and RNA) structure and function
Fluoroquinolones
Rifamycin
•Inhibition of protein synthesis
Tetracyclines target protein synthesis
Erythromycin: broad spectrum, low toxicity - blocks protein synthesis by attaching to the
ribosome
•Interference with cell membrane structure or function
Polymyxins:
Daptomycin:
•Inhibition of folic acid synthesis
Sulfa drugs
Sulfonamides
The complete destrustion of microbes is called
steralization
