BIO 101 LAB MIDTERM UNC
CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Unicellular organisms that lack membrane bound organelles, nuclei, and
usually asexually reproduce. Include domains Archaea and Bacteria.
Answer: Prokaryotes
◍ The conversion of nitrogen from the atmosphere into forms that can be used
by plants....bacteria play an important role in this.
Answer: Nitrogen fixation
◍ Bacteria that use light as their energy source but do not use water as a source
of electrons. Their photosynthetic pigments are different in structure and
they lack chloroplasts..
Answer: Photosynthetic bacteria
◍ Bacteria that obtains their energy from the oxidation of inorganic
substances. For example, sulfur oxidizing bacteria uses hydrogen sulfide as
their inorganic substance..
Answer: Chemosynthetic bacteria
◍ rod shaped bacteria.
Answer: Bacilli
◍ small sphere shaped bacteria.
Answer: Cocci
◍ corkscrew shaped bacteria.
Answer: spirilla
, ◍ Where the light passes through before the stage...controls the amount of
light passing through the slide.
Answer: Iris diaphragm
◍ Focuses all light on the specimen and should be close to the slide.
Answer: Condenser
◍ The first set of lenses...after the light strikes the specimen it continues up
through these lenses and magnifies the specimen.
Answer: Objectives
◍ On the top of the body tube...the last set of lenses that you look through.
Answer: Ocular lens
◍ The bacterium that uses milk sugar (lactose) and converts milk to yogurt.
Answer: Lactobacillus
◍ Photosynthetic prokaryote that contains chlorophyll a. Uses water in
photosynthetic process and produces O2. Occurs in unicellular form or
colonial form..
Answer: Blue-green algae
◍ Unicellular form of cyanobacteria. Surrounded by a gelatinous sheath...are
green because of chlorophyll in thylakoids.
Answer: Gloeocapsa
◍ Colonial form of cyanobacteria. Occur as filaments, plates, or sheaths..
Answer: Oscillatoria
◍ Forms 2-3 mm wide, moist looking colonies, opaque off-white, sometimes
yellow, gram positive. Staphylococcus epidermis, Staphylococcus aureus
(pathogen)..
Answer: Staphylococcus
◍ Tiny colonies less than 1 mm wide, transparent, barely off white, stains
gram positive, cocci, common in nose and mouth. Hemolytic species (able
to lyse red blood cells which is used for identification). Streptococcus lactis,
Streptococcus salivarius, Streptococcus pyogenes (strep throat)..
CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Unicellular organisms that lack membrane bound organelles, nuclei, and
usually asexually reproduce. Include domains Archaea and Bacteria.
Answer: Prokaryotes
◍ The conversion of nitrogen from the atmosphere into forms that can be used
by plants....bacteria play an important role in this.
Answer: Nitrogen fixation
◍ Bacteria that use light as their energy source but do not use water as a source
of electrons. Their photosynthetic pigments are different in structure and
they lack chloroplasts..
Answer: Photosynthetic bacteria
◍ Bacteria that obtains their energy from the oxidation of inorganic
substances. For example, sulfur oxidizing bacteria uses hydrogen sulfide as
their inorganic substance..
Answer: Chemosynthetic bacteria
◍ rod shaped bacteria.
Answer: Bacilli
◍ small sphere shaped bacteria.
Answer: Cocci
◍ corkscrew shaped bacteria.
Answer: spirilla
, ◍ Where the light passes through before the stage...controls the amount of
light passing through the slide.
Answer: Iris diaphragm
◍ Focuses all light on the specimen and should be close to the slide.
Answer: Condenser
◍ The first set of lenses...after the light strikes the specimen it continues up
through these lenses and magnifies the specimen.
Answer: Objectives
◍ On the top of the body tube...the last set of lenses that you look through.
Answer: Ocular lens
◍ The bacterium that uses milk sugar (lactose) and converts milk to yogurt.
Answer: Lactobacillus
◍ Photosynthetic prokaryote that contains chlorophyll a. Uses water in
photosynthetic process and produces O2. Occurs in unicellular form or
colonial form..
Answer: Blue-green algae
◍ Unicellular form of cyanobacteria. Surrounded by a gelatinous sheath...are
green because of chlorophyll in thylakoids.
Answer: Gloeocapsa
◍ Colonial form of cyanobacteria. Occur as filaments, plates, or sheaths..
Answer: Oscillatoria
◍ Forms 2-3 mm wide, moist looking colonies, opaque off-white, sometimes
yellow, gram positive. Staphylococcus epidermis, Staphylococcus aureus
(pathogen)..
Answer: Staphylococcus
◍ Tiny colonies less than 1 mm wide, transparent, barely off white, stains
gram positive, cocci, common in nose and mouth. Hemolytic species (able
to lyse red blood cells which is used for identification). Streptococcus lactis,
Streptococcus salivarius, Streptococcus pyogenes (strep throat)..
