BIOL 215 Exam 1 EXAM WITH 100%
DETAILED CORRECT ANSWERS
2025/2026 STUDY SET
When were cells first observed?
a. Early 1400s
b. Late 1500s
c. Mid 1600s
d. Early 1800s
e. Mid 1900s - CORRECT ANSWERS Mid 1600s
Who is credited with first observing cells?
a. Watson & Crick
b. Jonas Salk
c. Louis Pasteur
d. Robert Hooke
e. Elon Musk - CORRECT ANSWERS Robert Hooke
Which tenet in the first cell theory is wrong?
a. The cell is the unit of structure, physiology, and organization in living things.
b. The cell retains a dual existence as a distinct entity and a building block in the construction of
organisms.
c. Cells form by free-cell formation, similar to the formation of crystals. - CORRECT ANSWERS
Cells form by free-cell formation, similar to the formation of crystals.
,There are [ ] different "domains" of living organisms recognized in the contemporary phylogenetic tree
of life.
a. two
b. three
c. four
d. five
e. ten - CORRECT ANSWERS Three
What is the best way to describe a protist?
a. Diverse grouping of eukaryotic organisms
b. A type of prokaryote
c. A group of single-celled organisms
d. A type of delicious pastry
e. None of the above - CORRECT ANSWERS Diverse grouping of eukaryotic organisms
What charge will the following molecule (carboxylic acid) have in an aqueous environment?
a. positive
b. negative
c. neutral - CORRECT ANSWERS Negative
True or false?: In an aqueous environment, a hydroxyl group will be negatively charged. - CORRECT
ANSWERS False
How do prokaryotic cells and eukaryotic cells differ?
a. Prokaryotes do not have a nucleus, while eukaryotes do
b. Prokaryotes have a nucleus, while eukaryotes do not
,c. Prokaryotes have cell walls while eukaryotes do not
d. Both A and C
e. There is no real different between these cell types - CORRECT ANSWERS Prokaryotes
do not have a nucleus, while eukaryotes do
Prokaryotes include which organisms?
a. Bacteria
b. Archaea
c. Protists
d. All of the above
e. Both A and B - CORRECT ANSWERS Both A and B
Which unit would be used to measure the length of a bacterial cell?
a. Centimeters
b. Inches
c. Micrometers
d. Meters
e. Nanometers - CORRECT ANSWERS Micrometers
Which has a greater surface area to volume ratio?
a. Cell 1: 1 um x 1 um x 1 um
b. Cell 2: 5 um x 5 um x 5 um
c. Multicellular organism 1: 125 (1 um x 1 um x 1um)
d. Both a and c - CORRECT ANSWERS Both a and c
Which has a greater surface area to volume ratio?
, a. Cell 1: 1 um x 1 um x 1 um
b. Cell 2: 5 um x 5 um x 5 um
c. Multicellular organism 1: 125 (1 um x 1 um x 1 um)
d. Cell 4: 0.125 um x 5 um x 200 um
e. Both a and c - CORRECT ANSWERS Cell 4: 0.125 um x 5 um x 200 um
What cell type was featured in the Inner Life of a Cell video?
a. Red blood cells
b. Sperm
c. Bacteria
d. Proteins
e. White blood cells - CORRECT ANSWERS White blood cells
When fractionating cells, centrifugation will cause [ ] subcellular objects to form a pellet first.
a. larger/denser
b. smaller/less dense
c. Neither. All subcellular contents will sediment out of solution at the same time. - CORRECT ANSWERS
Larger/denser
S values [ ] from top to bottom of a centrifuge tube.
a. Increase
b. Decrease - CORRECT ANSWERS Increase
The process by which genetic information coded in messenger RNA directs the formation of a
polypeptide sequence is called [ ].
a. Transcription
DETAILED CORRECT ANSWERS
2025/2026 STUDY SET
When were cells first observed?
a. Early 1400s
b. Late 1500s
c. Mid 1600s
d. Early 1800s
e. Mid 1900s - CORRECT ANSWERS Mid 1600s
Who is credited with first observing cells?
a. Watson & Crick
b. Jonas Salk
c. Louis Pasteur
d. Robert Hooke
e. Elon Musk - CORRECT ANSWERS Robert Hooke
Which tenet in the first cell theory is wrong?
a. The cell is the unit of structure, physiology, and organization in living things.
b. The cell retains a dual existence as a distinct entity and a building block in the construction of
organisms.
c. Cells form by free-cell formation, similar to the formation of crystals. - CORRECT ANSWERS
Cells form by free-cell formation, similar to the formation of crystals.
,There are [ ] different "domains" of living organisms recognized in the contemporary phylogenetic tree
of life.
a. two
b. three
c. four
d. five
e. ten - CORRECT ANSWERS Three
What is the best way to describe a protist?
a. Diverse grouping of eukaryotic organisms
b. A type of prokaryote
c. A group of single-celled organisms
d. A type of delicious pastry
e. None of the above - CORRECT ANSWERS Diverse grouping of eukaryotic organisms
What charge will the following molecule (carboxylic acid) have in an aqueous environment?
a. positive
b. negative
c. neutral - CORRECT ANSWERS Negative
True or false?: In an aqueous environment, a hydroxyl group will be negatively charged. - CORRECT
ANSWERS False
How do prokaryotic cells and eukaryotic cells differ?
a. Prokaryotes do not have a nucleus, while eukaryotes do
b. Prokaryotes have a nucleus, while eukaryotes do not
,c. Prokaryotes have cell walls while eukaryotes do not
d. Both A and C
e. There is no real different between these cell types - CORRECT ANSWERS Prokaryotes
do not have a nucleus, while eukaryotes do
Prokaryotes include which organisms?
a. Bacteria
b. Archaea
c. Protists
d. All of the above
e. Both A and B - CORRECT ANSWERS Both A and B
Which unit would be used to measure the length of a bacterial cell?
a. Centimeters
b. Inches
c. Micrometers
d. Meters
e. Nanometers - CORRECT ANSWERS Micrometers
Which has a greater surface area to volume ratio?
a. Cell 1: 1 um x 1 um x 1 um
b. Cell 2: 5 um x 5 um x 5 um
c. Multicellular organism 1: 125 (1 um x 1 um x 1um)
d. Both a and c - CORRECT ANSWERS Both a and c
Which has a greater surface area to volume ratio?
, a. Cell 1: 1 um x 1 um x 1 um
b. Cell 2: 5 um x 5 um x 5 um
c. Multicellular organism 1: 125 (1 um x 1 um x 1 um)
d. Cell 4: 0.125 um x 5 um x 200 um
e. Both a and c - CORRECT ANSWERS Cell 4: 0.125 um x 5 um x 200 um
What cell type was featured in the Inner Life of a Cell video?
a. Red blood cells
b. Sperm
c. Bacteria
d. Proteins
e. White blood cells - CORRECT ANSWERS White blood cells
When fractionating cells, centrifugation will cause [ ] subcellular objects to form a pellet first.
a. larger/denser
b. smaller/less dense
c. Neither. All subcellular contents will sediment out of solution at the same time. - CORRECT ANSWERS
Larger/denser
S values [ ] from top to bottom of a centrifuge tube.
a. Increase
b. Decrease - CORRECT ANSWERS Increase
The process by which genetic information coded in messenger RNA directs the formation of a
polypeptide sequence is called [ ].
a. Transcription
