BIOL 2117 COMPREHENSIVE 2026 EXAM QUESTIONS AND
ANSWERS RATED A+
✔✔Which of the following is NOT an end-product of fermentation? - ✔✔Pyruvic acid
✔✔How is ATP generated in the reaction in Figure 5.4? - ✔✔Substrate-level
phosphorylation
✔✔Aerobic respiration differs from anaerobic respiration in which of the following
respects? - ✔✔The final electron acceptors are different.
✔✔Which of the following is not true about anaerobic respiration? - ✔✔It involves
glycolysis only.
✔✔In figure 5.8 is a diagrammatic representation of the electron transport chain, how is
ATP produced here? - ✔✔Oxidative phosphorylation
✔✔Refer to figure 5.8 in a prokaryotic cell what is the structure labeled 1 - ✔✔plasma
membrane
✔✔Refer to figure 5.8 in a eukaryotic cell what the structure labeled 1? - ✔✔inner
membrane of the mitochondrion.
✔✔Which of the following is NOT necessary for respiration? - ✔✔oxygen
✔✔Bacteria growing in a glucose-peptide medium cause the pH to decrease. The
bacteria are most likely - ✔✔fermenting the glucose.
✔✔ Which of the following statements is FALSE? - ✔✔all microorganisms are
pathogens that cause disease
✔✔Who proposed the Germ Theory of Disease? - ✔✔Koch
✔✔Which of the following is a Scientific Name - ✔✔Streptococcus Pyogenes
✔✔You are observing a cell through a microscope and note that it has no apparent
nucleus. You conclude that it most likely - ✔✔Has a peptidoglycan cell wall
✔✔Eukaryotic cells differ from prokaryotic cells because they - ✔✔Have a nucleus
✔✔In the name MYCOBACTERIUM tuberculosis, tuberculosis is the - ✔✔Specific
epithet
, ✔✔You are looking at a white cottony growth on a culture medium. Microscopic
examination reveals it is multicellular. Which of the following statements could NEVER
be true about this organism? - ✔✔Is a bacterium
✔✔Place the steps of the Gram stain in the correct order: 1-Alcohol-acetone; 2-Crystal
violet; 3-Safranin; 4-Iodine. - ✔✔2-4-1-3
✔✔The purpose of the mordant in the Gram Stain is - ✔✔To prevent the crystal violet
from leaving the cells
✔✔What color are the gram-positive bacteria after adding the primary stain in the Gram
Stain? - ✔✔Purple
✔✔What color are the gram-negative bacteria after addition of the mordant in the Gram
stain? - ✔✔Purple
✔✔What color are the gram-negative bacteria after addition of the decolorizing agent in
the Gram stain? - ✔✔Colorless
✔✔What color are the gram-positive bacteria after the counterstain in the Gram stain? -
✔✔Purple
✔✔What color are the gram-negative bacteria after completing the Gram Stain? -
✔✔Red
✔✔Gram + and Gram - cells can be differentiated after which step in the Gram stain? -
✔✔Alcohol-acetone
✔✔Which of the following is NOT equal to 1 m? - ✔✔100 mm
✔✔Which microscope achieves the highest magnification? - ✔✔Electron microscope
✔✔In Figure 3.1 line A points to the Microscope's - ✔✔ocular lens
✔✔In figure 3.1 line b points to the microscope's - ✔✔objective lens
✔✔In figure 3.1 line "C" points to the microscope's - ✔✔condenser
✔✔What is the total magnification of a cell viewed with a 10x ocular lens and a 40x
objective lens? - ✔✔400x
✔✔Which microscope is needed to see detail of a 300-nm virus? - ✔✔Electron
Microscope
ANSWERS RATED A+
✔✔Which of the following is NOT an end-product of fermentation? - ✔✔Pyruvic acid
✔✔How is ATP generated in the reaction in Figure 5.4? - ✔✔Substrate-level
phosphorylation
✔✔Aerobic respiration differs from anaerobic respiration in which of the following
respects? - ✔✔The final electron acceptors are different.
✔✔Which of the following is not true about anaerobic respiration? - ✔✔It involves
glycolysis only.
✔✔In figure 5.8 is a diagrammatic representation of the electron transport chain, how is
ATP produced here? - ✔✔Oxidative phosphorylation
✔✔Refer to figure 5.8 in a prokaryotic cell what is the structure labeled 1 - ✔✔plasma
membrane
✔✔Refer to figure 5.8 in a eukaryotic cell what the structure labeled 1? - ✔✔inner
membrane of the mitochondrion.
✔✔Which of the following is NOT necessary for respiration? - ✔✔oxygen
✔✔Bacteria growing in a glucose-peptide medium cause the pH to decrease. The
bacteria are most likely - ✔✔fermenting the glucose.
✔✔ Which of the following statements is FALSE? - ✔✔all microorganisms are
pathogens that cause disease
✔✔Who proposed the Germ Theory of Disease? - ✔✔Koch
✔✔Which of the following is a Scientific Name - ✔✔Streptococcus Pyogenes
✔✔You are observing a cell through a microscope and note that it has no apparent
nucleus. You conclude that it most likely - ✔✔Has a peptidoglycan cell wall
✔✔Eukaryotic cells differ from prokaryotic cells because they - ✔✔Have a nucleus
✔✔In the name MYCOBACTERIUM tuberculosis, tuberculosis is the - ✔✔Specific
epithet
, ✔✔You are looking at a white cottony growth on a culture medium. Microscopic
examination reveals it is multicellular. Which of the following statements could NEVER
be true about this organism? - ✔✔Is a bacterium
✔✔Place the steps of the Gram stain in the correct order: 1-Alcohol-acetone; 2-Crystal
violet; 3-Safranin; 4-Iodine. - ✔✔2-4-1-3
✔✔The purpose of the mordant in the Gram Stain is - ✔✔To prevent the crystal violet
from leaving the cells
✔✔What color are the gram-positive bacteria after adding the primary stain in the Gram
Stain? - ✔✔Purple
✔✔What color are the gram-negative bacteria after addition of the mordant in the Gram
stain? - ✔✔Purple
✔✔What color are the gram-negative bacteria after addition of the decolorizing agent in
the Gram stain? - ✔✔Colorless
✔✔What color are the gram-positive bacteria after the counterstain in the Gram stain? -
✔✔Purple
✔✔What color are the gram-negative bacteria after completing the Gram Stain? -
✔✔Red
✔✔Gram + and Gram - cells can be differentiated after which step in the Gram stain? -
✔✔Alcohol-acetone
✔✔Which of the following is NOT equal to 1 m? - ✔✔100 mm
✔✔Which microscope achieves the highest magnification? - ✔✔Electron microscope
✔✔In Figure 3.1 line A points to the Microscope's - ✔✔ocular lens
✔✔In figure 3.1 line b points to the microscope's - ✔✔objective lens
✔✔In figure 3.1 line "C" points to the microscope's - ✔✔condenser
✔✔What is the total magnification of a cell viewed with a 10x ocular lens and a 40x
objective lens? - ✔✔400x
✔✔Which microscope is needed to see detail of a 300-nm virus? - ✔✔Electron
Microscope
