Biology 101, Exam 2 Questions and
Answers Graded A+
Three cell parts found in all cells? - Correct answer-DNA, plasma membrane, and
cytoplasm or ribosomes
What is the cell theory? - Correct answer-The cell is the basic unit of life, all living
things are made up of one or more cells, and all cells come from the reproduction
of other cells
Cells that do not have a nucleus are: - Correct answer-prokaryotes
DNA in bacterial/prokaryotic cells forms a: - Correct answer-circle
DNA in eukaryotic cells are: - Correct answer-linear
Why are cells small? - Correct answer-Cells do not get very large because the
surface area to volume ratio must be high to allow for the ready exchange of
materials in and out of the cell
What three cell parts are found ONLY in plant cells? - Correct answer-cell wall,
chloroplasts, and the large/central vacuole
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,What is Endosymbiosis? - Correct answer-The theory that some prokaryotic cells
engulfed other prokaryotic cells thus forming membrane-bound structures (like
mitochondria or chloroplasts) and ultimately giving rise to eukaryotic cells
What is the organelle site of the reaction called CELLULAR RESPIRATION in
eukaryotic cells? - Correct answer-Mitochondria
What do you call the site of PROTEIN and LIPID SYNTHESIS in eukaryotic cells
is an ENDOMEMBRANE SYSTEM? - Correct answer-the Endoplasmic
Reticulum
What can you find in the nucleus? - Correct answer-the nucleolus and DNA
How can you distinguish between the ROUGH E.R. and the SMOOTH E.R.? -
Correct answer-the presence of RIBOSOMES in the rough E.R.
What are the three structures that enable cells to move? - Correct answer-cilia,
flagella, and psuedopods
What is found within the CHLOROPLASTS and is the site of
PHOTOSYNTHESIS? - Correct answer-thylakoids
What are the folds within the MITOCHONDRIA called? - Correct answer-cristae
What are cytoplasmic bridges found between PLANT cells? (holes in the CELL
WALL) - Correct answer-plasmodesmata
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, What are the cytoplasmic bridges found between ANIMAL cells? (openings in the
CELL MEMBRANES) - Correct answer-gap junctions
Which organelle contains DIGESTIVE ENZYMES? - Correct answer-the
lysosome
The lysosome is produced by the pinching off of portions of the membranes of the:
- Correct answer-Golgi bodies/apparatus
What is the site of PROTEIN SYNTHESIS? - Correct answer-Ribosomes
What is the largest CYTOSKELETON component? - Correct answer-the
microtubules
What are the structures involved in CELL MOVEMENT that are made up of "9+2"
microtubules? - Correct answer-Cilia and Flagella
What are the pair of structures that are made up of 9 triplets of microtubules? -
Correct answer-the centrioles
Centrioles are involved in the movement of chromosomes during cell division and
found only in: - Correct answer-Animal cells
Describe the make-up of a CELL MEMBRANE - Correct answer-The cell
membrane is made of a bilayer of PHOSPHOLIPIDS, with PROTEINS floating in
them
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Answers Graded A+
Three cell parts found in all cells? - Correct answer-DNA, plasma membrane, and
cytoplasm or ribosomes
What is the cell theory? - Correct answer-The cell is the basic unit of life, all living
things are made up of one or more cells, and all cells come from the reproduction
of other cells
Cells that do not have a nucleus are: - Correct answer-prokaryotes
DNA in bacterial/prokaryotic cells forms a: - Correct answer-circle
DNA in eukaryotic cells are: - Correct answer-linear
Why are cells small? - Correct answer-Cells do not get very large because the
surface area to volume ratio must be high to allow for the ready exchange of
materials in and out of the cell
What three cell parts are found ONLY in plant cells? - Correct answer-cell wall,
chloroplasts, and the large/central vacuole
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,What is Endosymbiosis? - Correct answer-The theory that some prokaryotic cells
engulfed other prokaryotic cells thus forming membrane-bound structures (like
mitochondria or chloroplasts) and ultimately giving rise to eukaryotic cells
What is the organelle site of the reaction called CELLULAR RESPIRATION in
eukaryotic cells? - Correct answer-Mitochondria
What do you call the site of PROTEIN and LIPID SYNTHESIS in eukaryotic cells
is an ENDOMEMBRANE SYSTEM? - Correct answer-the Endoplasmic
Reticulum
What can you find in the nucleus? - Correct answer-the nucleolus and DNA
How can you distinguish between the ROUGH E.R. and the SMOOTH E.R.? -
Correct answer-the presence of RIBOSOMES in the rough E.R.
What are the three structures that enable cells to move? - Correct answer-cilia,
flagella, and psuedopods
What is found within the CHLOROPLASTS and is the site of
PHOTOSYNTHESIS? - Correct answer-thylakoids
What are the folds within the MITOCHONDRIA called? - Correct answer-cristae
What are cytoplasmic bridges found between PLANT cells? (holes in the CELL
WALL) - Correct answer-plasmodesmata
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, What are the cytoplasmic bridges found between ANIMAL cells? (openings in the
CELL MEMBRANES) - Correct answer-gap junctions
Which organelle contains DIGESTIVE ENZYMES? - Correct answer-the
lysosome
The lysosome is produced by the pinching off of portions of the membranes of the:
- Correct answer-Golgi bodies/apparatus
What is the site of PROTEIN SYNTHESIS? - Correct answer-Ribosomes
What is the largest CYTOSKELETON component? - Correct answer-the
microtubules
What are the structures involved in CELL MOVEMENT that are made up of "9+2"
microtubules? - Correct answer-Cilia and Flagella
What are the pair of structures that are made up of 9 triplets of microtubules? -
Correct answer-the centrioles
Centrioles are involved in the movement of chromosomes during cell division and
found only in: - Correct answer-Animal cells
Describe the make-up of a CELL MEMBRANE - Correct answer-The cell
membrane is made of a bilayer of PHOSPHOLIPIDS, with PROTEINS floating in
them
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
