MCB2010: MCB2010L Midterm
Practical Exam and Already Solved
Solutions 2025-2026 Edition.
Oil Immersion - Answer -Light bends/refracts when it moves from one medium to another
-Only use with the 100x objective
Resolution - Answer -The ability of a leans system to distinguish as separate entities objects
that are very small and very close together
-Determined by the quality of the lens and wavelength of light used
Protozoa - Answer -Single-celled eukaryotic microorganisms
-Classified by movement: flagella, cilia, amoeboid motion, and parasites with nonmotile adult
forms
-Amoeba proteus, Paramecium caudatum, Euglena
Amoeba Proteus - Answer -Amoeboid motion
Paramecium caudatum - Answer -Cilia motion
Euglena - Answer -Flagella motion
Cyanobacteria - Answer -Prokaryotic
-Nitrogen Fixation
-Photosynthetic
-Anabaena, Rivularia, Oscillatoria
Anabaena - Answer -Heterocyst (thick-walled cells responsible for nitrogen fixation)
Rivularia - Answer -"Fire-work appearance"
Oscillatoria - Answer -Very flat, pushed up against each other
Algae - Answer -Unicellular/multicellular eukaryotic, photosynthetic microorganisms
-Diatoms, green algae, dinoflagellates, and macoalgae (moss)
,Diatoms - Answer -Silica-shelled algae
-Synedra
Synedra - Answer -Diatoms
-Photosynthetic
-Unicellular or colonial (attach to each other by frustulas)
-Part of Diatomaceous Earth in fossil record
-Some species cause disease through production of domoic acid neutoxin
Green Algae - Answer -Spirogyra (helical formation of chloroplasts)
-Chlamydomonas (found in freshwater environments)
Chlamydomonas - Answer -Green Algae
-Had 2 flagella
-Unicellular or colonial
-Utilizes chlorophyll A for photosynthesis
Spirogyra - Answer -Green Algae
-Filamentous
-Helical "string" of chloroplasts
-Utilizes chlorophyll A for photosynthesis
Dinoflagellates - Answer -Peridinium (cellolose or starch shell)
Peridinium - Answer -Dinoflagellates
-Flagellated (flagella wrapped in grooves)
-Cellulose shell surrounds photosynthetic organism
-Some species can cause disease (Paralytic shellfish poisoning) by producing lipid-soluble toxins
Macoalgae (Moss) - Answer -Chara (macroalgaea, multicellular, reproduce sexually)
Fungi - Answer -Eukaryotic, not photosynthetic
-Most fungi are saprophytic (release enzymes that predigest nutrients for absorption)
-Yeast, molds
, Yeast - Answer -Single-celled fungi (still eukaryotic)
-Saccharomyces (Bakers Yeast)
Saccharomyces - Answer -Bakers Yeast
-Used for bread making, beer and wine
-Important in biotechnology industry for production of drugs, cancer therapies, and genetic
studies
Molds - Answer -Aspergillus
-Rhizopus
Aspergillus - Answer -Common in air
-Can colonie bronchial tree in immunocompromised
-Commercially important for fermentation and acid production
-Zygomycete
-Zygomycete
Rhizopus - Answer -Common bread mold
-Can cause disease in immunocompromised
-Zygomycete
Clinically Important Fungi - Answer -Candidas albicans
-Penicillium
Candidas albicans - Answer -Dimorphic (yeastlike or multicellular)
-Cause cadidiasis (common yeast infection) when over-colonization occurs
-Part of normal vaginal flora
-Can also cause oral, cutaneous and pulmonary infections, primarily in immunocompromised
Penicillium - Answer -Common blue/green bread mold
-Source of antibiotic known as penicillin
-Can cause pulmonary, hepatic, cutaneous and other forms of infections in
immunocompromised
Practical Exam and Already Solved
Solutions 2025-2026 Edition.
Oil Immersion - Answer -Light bends/refracts when it moves from one medium to another
-Only use with the 100x objective
Resolution - Answer -The ability of a leans system to distinguish as separate entities objects
that are very small and very close together
-Determined by the quality of the lens and wavelength of light used
Protozoa - Answer -Single-celled eukaryotic microorganisms
-Classified by movement: flagella, cilia, amoeboid motion, and parasites with nonmotile adult
forms
-Amoeba proteus, Paramecium caudatum, Euglena
Amoeba Proteus - Answer -Amoeboid motion
Paramecium caudatum - Answer -Cilia motion
Euglena - Answer -Flagella motion
Cyanobacteria - Answer -Prokaryotic
-Nitrogen Fixation
-Photosynthetic
-Anabaena, Rivularia, Oscillatoria
Anabaena - Answer -Heterocyst (thick-walled cells responsible for nitrogen fixation)
Rivularia - Answer -"Fire-work appearance"
Oscillatoria - Answer -Very flat, pushed up against each other
Algae - Answer -Unicellular/multicellular eukaryotic, photosynthetic microorganisms
-Diatoms, green algae, dinoflagellates, and macoalgae (moss)
,Diatoms - Answer -Silica-shelled algae
-Synedra
Synedra - Answer -Diatoms
-Photosynthetic
-Unicellular or colonial (attach to each other by frustulas)
-Part of Diatomaceous Earth in fossil record
-Some species cause disease through production of domoic acid neutoxin
Green Algae - Answer -Spirogyra (helical formation of chloroplasts)
-Chlamydomonas (found in freshwater environments)
Chlamydomonas - Answer -Green Algae
-Had 2 flagella
-Unicellular or colonial
-Utilizes chlorophyll A for photosynthesis
Spirogyra - Answer -Green Algae
-Filamentous
-Helical "string" of chloroplasts
-Utilizes chlorophyll A for photosynthesis
Dinoflagellates - Answer -Peridinium (cellolose or starch shell)
Peridinium - Answer -Dinoflagellates
-Flagellated (flagella wrapped in grooves)
-Cellulose shell surrounds photosynthetic organism
-Some species can cause disease (Paralytic shellfish poisoning) by producing lipid-soluble toxins
Macoalgae (Moss) - Answer -Chara (macroalgaea, multicellular, reproduce sexually)
Fungi - Answer -Eukaryotic, not photosynthetic
-Most fungi are saprophytic (release enzymes that predigest nutrients for absorption)
-Yeast, molds
, Yeast - Answer -Single-celled fungi (still eukaryotic)
-Saccharomyces (Bakers Yeast)
Saccharomyces - Answer -Bakers Yeast
-Used for bread making, beer and wine
-Important in biotechnology industry for production of drugs, cancer therapies, and genetic
studies
Molds - Answer -Aspergillus
-Rhizopus
Aspergillus - Answer -Common in air
-Can colonie bronchial tree in immunocompromised
-Commercially important for fermentation and acid production
-Zygomycete
-Zygomycete
Rhizopus - Answer -Common bread mold
-Can cause disease in immunocompromised
-Zygomycete
Clinically Important Fungi - Answer -Candidas albicans
-Penicillium
Candidas albicans - Answer -Dimorphic (yeastlike or multicellular)
-Cause cadidiasis (common yeast infection) when over-colonization occurs
-Part of normal vaginal flora
-Can also cause oral, cutaneous and pulmonary infections, primarily in immunocompromised
Penicillium - Answer -Common blue/green bread mold
-Source of antibiotic known as penicillin
-Can cause pulmonary, hepatic, cutaneous and other forms of infections in
immunocompromised
