General Biology Bio 181 Exam Prep Guide Covering
Chapters 4, 5 and 6 Review Questions and Correct
Answers / BIO 181 Exam Prep Test Bank Latest 2026
(Chapter 4-6 Correctly Answered Questions)
Contents
Bio 181 Chapter 4 (200 Questions) ............................................................................................................ 1
Bio 181 Chapter 5 (200 Questions) .......................................................................................................... 29
Bio 181 Chapter 6 (200 Questions) .......................................................................................................... 59
Bio 181 Chapter 4 (200 Questions)
Which of these statements is not a part of the cell theory?
All cells are replaced.
Cells are the smallest units of life.
All living organisms are composed of one or more cells.
New cells come only from pre-existing cells by cell division. - ANSWER-All cells
are replaced.
Most cells are relatively small for reasons related to the _____________ of
substances into and out of cells. - ANSWER-Diffusion, movement, transport,
moving, transfer, or passage
Which of the following microscopes can yield three-dimensional images? -
ANSWER-Scanning electron microscopes
Which of the following is found in all cells? - ANSWER-Ribosomes
Most of the DNA in prokaryotes is located in the __________ region. -
ANSWER-Nucleoid
pg. 1
,________ is the minimum distance two points can be apart and still be
distinguished as two separate points. - ANSWER-Resolution
Structures called _________________ are found in both prokaryotic and
eukaryotic cells and are the sites of polypeptide synthesis. - ANSWER-ribosomes
Most bacterial cells are encased by a strong cell wall composed of ___________
which is a carbohydrate matrix cross-linked by polypeptides. - ANSWER-
peptidoglycan or murein
During cell division, cell-wall deposition is influenced by - ANSWER-FtsZ
proteins
In the cyanobacterium, Prochloron, the bacterial pigments associated with
photosynthesis are located in which of the following structures? - ANSWER-
Plasma membrane
Of the following choices, the presence of which would definitively identify a cell
as prokaryotic? - ANSWER-Pili
Prokaryotes consists of two categories of organisms: ____________ and
_____________. - ANSWER-Bacteria
Archaea
The ________ _________ of a bacterium helps the organism maintain its shape
and prevents the excessive loss of water. - ANSWER-cell wall
pg. 2
,Which of the following factors would decrease the rate of diffusion? (Select all that
apply) - ANSWER-The need to produce more macromolecules
Greater production of wastes
Higher energy requirements
Identify the scientists who are credited with the cell theory. - ANSWER-Schleiden
and Schwann
Which of the following is the theory that is the unifying foundation of cell
biology? - ANSWER-Cell theory
Most cells are relatively small for reasons related to _________of substances into
and out of cells. - ANSWER-diffusion
Which of these is not a variable that affects the rate of diffusion through a cell's
plasma membrane? - ANSWER-The volume of the cell
If the radius of the cell increases by ___________ time, then the surface area will
increase by times and the volume will increase by a __________ times (please fill
blanks with numbers). - ANSWER-100
1000
An organism made up of relatively small cells has an advantage over an organism
composed of fewer, larger cells because the rate at which transport of molecules
occurs depends on which of the following? - ANSWER-The distance to the
membrane and the area of membrane
__________ extended Schleiden's hypothesis by suggesting that animal tissue was
made up of cells. - ANSWER-Theodor Schwann
pg. 3
, The purpose of a compound light microscope can best be described as which of the
following? - ANSWER-To allow the visualization of cells and cellular
components
Which of the following is a cell type that can be seen without the aid of a
microscope? - ANSWER-Vertebrate eggs
Which of the following is the most important factor that limits the size of cells? -
ANSWER-Diffusion of substances in and out of the cell
As a cell's size increases, its_________________ increases much more rapidly
than its surface area. - ANSWER-Volume
Select problems faced by larger cells compared to smaller cells. - ANSWER-The
need to produce more macromolecules
Higher energy requirements
Greater production of wastes
_____________ are the instruments used to magnify and visualize cells and
cellular components. - ANSWER-Microscopes
Due to the limited resolution of the human eye, microscopes are needed to
visualize points as two separate objects if they are closer than which of the
following? - ANSWER-100 um
Which of the following cells are macroscopic? - ANSWER-Vertebrate eggs
pg. 4
Chapters 4, 5 and 6 Review Questions and Correct
Answers / BIO 181 Exam Prep Test Bank Latest 2026
(Chapter 4-6 Correctly Answered Questions)
Contents
Bio 181 Chapter 4 (200 Questions) ............................................................................................................ 1
Bio 181 Chapter 5 (200 Questions) .......................................................................................................... 29
Bio 181 Chapter 6 (200 Questions) .......................................................................................................... 59
Bio 181 Chapter 4 (200 Questions)
Which of these statements is not a part of the cell theory?
All cells are replaced.
Cells are the smallest units of life.
All living organisms are composed of one or more cells.
New cells come only from pre-existing cells by cell division. - ANSWER-All cells
are replaced.
Most cells are relatively small for reasons related to the _____________ of
substances into and out of cells. - ANSWER-Diffusion, movement, transport,
moving, transfer, or passage
Which of the following microscopes can yield three-dimensional images? -
ANSWER-Scanning electron microscopes
Which of the following is found in all cells? - ANSWER-Ribosomes
Most of the DNA in prokaryotes is located in the __________ region. -
ANSWER-Nucleoid
pg. 1
,________ is the minimum distance two points can be apart and still be
distinguished as two separate points. - ANSWER-Resolution
Structures called _________________ are found in both prokaryotic and
eukaryotic cells and are the sites of polypeptide synthesis. - ANSWER-ribosomes
Most bacterial cells are encased by a strong cell wall composed of ___________
which is a carbohydrate matrix cross-linked by polypeptides. - ANSWER-
peptidoglycan or murein
During cell division, cell-wall deposition is influenced by - ANSWER-FtsZ
proteins
In the cyanobacterium, Prochloron, the bacterial pigments associated with
photosynthesis are located in which of the following structures? - ANSWER-
Plasma membrane
Of the following choices, the presence of which would definitively identify a cell
as prokaryotic? - ANSWER-Pili
Prokaryotes consists of two categories of organisms: ____________ and
_____________. - ANSWER-Bacteria
Archaea
The ________ _________ of a bacterium helps the organism maintain its shape
and prevents the excessive loss of water. - ANSWER-cell wall
pg. 2
,Which of the following factors would decrease the rate of diffusion? (Select all that
apply) - ANSWER-The need to produce more macromolecules
Greater production of wastes
Higher energy requirements
Identify the scientists who are credited with the cell theory. - ANSWER-Schleiden
and Schwann
Which of the following is the theory that is the unifying foundation of cell
biology? - ANSWER-Cell theory
Most cells are relatively small for reasons related to _________of substances into
and out of cells. - ANSWER-diffusion
Which of these is not a variable that affects the rate of diffusion through a cell's
plasma membrane? - ANSWER-The volume of the cell
If the radius of the cell increases by ___________ time, then the surface area will
increase by times and the volume will increase by a __________ times (please fill
blanks with numbers). - ANSWER-100
1000
An organism made up of relatively small cells has an advantage over an organism
composed of fewer, larger cells because the rate at which transport of molecules
occurs depends on which of the following? - ANSWER-The distance to the
membrane and the area of membrane
__________ extended Schleiden's hypothesis by suggesting that animal tissue was
made up of cells. - ANSWER-Theodor Schwann
pg. 3
, The purpose of a compound light microscope can best be described as which of the
following? - ANSWER-To allow the visualization of cells and cellular
components
Which of the following is a cell type that can be seen without the aid of a
microscope? - ANSWER-Vertebrate eggs
Which of the following is the most important factor that limits the size of cells? -
ANSWER-Diffusion of substances in and out of the cell
As a cell's size increases, its_________________ increases much more rapidly
than its surface area. - ANSWER-Volume
Select problems faced by larger cells compared to smaller cells. - ANSWER-The
need to produce more macromolecules
Higher energy requirements
Greater production of wastes
_____________ are the instruments used to magnify and visualize cells and
cellular components. - ANSWER-Microscopes
Due to the limited resolution of the human eye, microscopes are needed to
visualize points as two separate objects if they are closer than which of the
following? - ANSWER-100 um
Which of the following cells are macroscopic? - ANSWER-Vertebrate eggs
pg. 4
