Question 1

A ribosome is a cell structure but is not considered an organelle because it

Accepted Answer

A)   does not contain its own genetic material.
B)   does not produce its own energy.
C)   lacks a membrane.
D)   is present in prokaryotes.
E)   is not made up of proteins.F) C) and E)
G) A) and B)

Question 2

Microvilli are supported by a network of which type of structure?

Accepted Answer

A)   Microtubules
B)   Microfilaments
C)   Myosin
D)   Intermediate filaments
E)   ChromatinF) B) and E)
G) A) and E)

Question 3

You discover what looks to be a new organelle that is smaller than a mitochondrion, but you need to do further testing to best determine its cellular function.What would be your best plan of action?

Accepted Answer

A)   Use a light microscope under normal culturing conditions, and watch the organelle's movement through the cell.
B)   Observe the organelle with freeze-fracture electron microscopy.
C)   Isolate the organelle using cell fractionation, and follow with further biochemical analysis.
D)   Use a chemical against actin to prevent organelle transport within the cell and observe the resulting cellular function.
E)   Use a detergent to break up the lipid membrane of the organelle in the cell, and observe the resulting cell function.F) C) and D)
G) A) and B)

Question 4

A mutant cell line is compared with a nonmutant cell line of the same type.The nonmutant cells secrete the steroid estrogen, but the mutant cells do not.Where should a researcher look to determine whether the mutant cells' defect is in the excretion of the hormone or in its synthesis?

Accepted Answer

A)   The smooth ER
B)   The rough ER
C)   Mitochondria
D)   Free ribosomes
E)   The Golgi apparatusF) A) and B)
G) B) and D)

Question 5

Which is a function of a plant cell vacuole?

Accepted Answer

A)   Energy metabolism
B)   Physical support
C)   Information storage
D)   Metabolic regulation
E)   Protein transportF) A) and E)
G) B) and C)

Question 6

The diagram below shows a cutaway side view of a plant cell wall and cell membrane.  Which biological function is emphasized by the structure shown?

Accepted Answer

A)   Transport of materials between cells
B)   Uptake of water and materials from the environment
C)   Cell-to-cell recognition and communication
D)   Structural support of the whole plant
E)   Growth and developmentF) B) and D)
G) A) and D)

Question 7

Which technique could you use to determine whether the flagellum-like structure you are observing is made of the protein flagellin or the protein tubulin?

Accepted Answer

A)   Cell fractionation
B)   Light microscopy
C)   Biochemical analysis
D)   Cell culturing techniques
E)   Videography of living cellsF) C) and E)
G) A) and E)

Question 8

Which statement about the nuclear envelope is true?

Accepted Answer

A)   It contains pores for the passage of large molecules.
B)   It is composed of a single membrane.
C)   It contains ribosomes on the inner surface.
D)   It allows proteins to freely pass through.
E)   It cannot be separated from other subcellular structures by cell fractionation.F) None of the above
G) A) and D)

Question 9

If the organelles of an animal cell were separated by centrifugation, which organelles would require the least centrifugal force to settle to the bottom of the centrifuge tube?

Accepted Answer

A)   Mitochondria
B)   Nuclei
C)   Golgi apparatus
D)   Lysosomes
E)   ChloroplastsF) C) and D)
G) All of the above

Question 10

Transport of cytoplasmic materials between plant cells is facilitated by

Accepted Answer

A)   motor proteins such as kinesin.
B)   membrane-lined channels called plasmodesmata.
C)   the semirigid cell wall.
D)   constantly beating cilia.
E)   an internal cytoskeleton.F) C) and D)
G) A) and B)

Question 11

When you cut an orange in half, you _______ the surface area-to-volume ratio.

Accepted Answer

The answer of When you cut an orange in half,...

Question 12

Sketch a prokaryotic cell and label at least six of its main features.

Accepted Answer

The answer of Sketch a prokaryotic cell and label at...

Question 13

A patient is admitted to the hospital for dehydration and malnutrition.On close observation of the intestine, it appears that the cells lining the intestine have fully formed microvilli.However, these microvilli are not uniformly standing upright and protruding into the lumen of the intestine, but are lying down so that full exposure to the contents of the intestine cannot be obtained.The doctors conclude that the patient may have a defect in what cellular component?

Accepted Answer

A)   Actin
B)   Myosin
C)   Intermediate filaments
D)   Microfibers
E)   TubulinF) All of the above
G) C) and E)

Question 14

A dye is injected into one plant cell and is observed to travel into adjacent plant cells.The dye is traveling between cells through

Accepted Answer

A)   osmosis.
B)   plasmodesmata.
C)   nuclear pores.
D)   integrin.
E)   dynein.F) C) and D)
G) None of the above

Question 15

The diagram below shows the interface between a blood vessel and several kidney cells.The arrows indicate the direction of flow of molecules from the blood into the kidneys to form urine.The extracellular matrix is shown lying between the kidney cells and the cells lining the blood vessel walls.  This is an example of an extracellular matrix functioning in _______ of molecules, ensuring that proteins are retained in the blood while water, salts, and other small molecules pass into the urine.

Accepted Answer

The answer of The diagram below shows the interface between...

Question 16

Which statement is true concerning endosymbiosis?

Accepted Answer

A)   Endosymbiotic events never occur in modern times.
B)   Endosymbiosis explains the evolution of mitochondria and plastids.
C)   Endosymbiosis is a theory that has little evidence to support it.
D)   The nucleus probably formed through an endosymbiotic event.
E)   The endomembrane system likely formed as the result of endosymbiosis.F) A) and B)
G) B) and E)

Question 17

The _______ is the fundamental unit of life.

Accepted Answer

The answer of The _______ is the fundamental unit of...

Question 18

A cancer drug is being tested, and it is found that although the cancer cells can divide, the nuclear envelope cannot re-form.It is determined that a protein substance is sequestered so that it cannot be polymerized into the necessary structure.What is the most likely protein target of the drug?

Accepted Answer

A)   Lamin
B)   Keratin
C)   α-tubulin
D)   β-tubulin
E)   ActinF) A) and B)
G) A) and C)

Question 19

What type of agent would be most likely to disrupt the structures of microvilli?

Accepted Answer

A)   Actin cross-linking agent
B)   Tubulin polymerization inhibitor
C)   Microtubule disruptors
D)   Actin polymerizing agent
E)   Actin depolymerizing agentF) C) and E)
G) C) and D)

Question 20

A cultured cell line appears to be having trouble surviving.Upon closer examination, you find that the cells do not appear to have normal chromosome separation.Based on this observation, you decide to check for the presence of a mutated protein.You will be sure to analyze the gene for which protein?

Accepted Answer

A)   Actin
B)   Tubulin
C)   Nexin
D)   Myosin
E)   MelaninF) C) and D)
G) A) and E)

Exam 5: Cells: the Working Units of Life

What type of agent would be most likely to disrupt the structures of microvilli?

Correct Answer
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Correct Answer
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Which is a function of a plant cell vacuole?

Correct Answer
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A mutant cell line is compared with a nonmutant cell line of the same type.The nonmutant cells secrete the steroid estrogen, but the mutant cells do not.Where should a researcher look to determine whether the mutant cells' defect is in the excretion of the hormone or in its synthesis?

Correct Answer
verified

A dye is injected into one plant cell and is observed to travel into adjacent plant cells.The dye is traveling between cells through

Correct Answer
verified

Correct Answer
verified

You discover what looks to be a new organelle that is smaller than a mitochondrion, but you need to do further testing to best determine its cellular function.What would be your best plan of action?

Correct Answer
verified

The diagram below shows a cutaway side view of a plant cell wall and cell membrane. Which biological function is emphasized by the structure shown?

Correct Answer
verified

The _______ is the fundamental unit of life.

Correct Answer
verified

Which statement is true concerning endosymbiosis?

Correct Answer
verified

Microvilli are supported by a network of which type of structure?

Correct Answer
verified

Which statement about the nuclear envelope is true?

Correct Answer
verified

Transport of cytoplasmic materials between plant cells is facilitated by

Correct Answer
verified

A cancer drug is being tested, and it is found that although the cancer cells can divide, the nuclear envelope cannot re-form.It is determined that a protein substance is sequestered so that it cannot be polymerized into the necessary structure.What is the most likely protein target of the drug?

Correct Answer
verified

A ribosome is a cell structure but is not considered an organelle because it

Correct Answer
verified

When you cut an orange in half, you _______ the surface area-to-volume ratio.

Correct Answer
verified

Which technique could you use to determine whether the flagellum-like structure you are observing is made of the protein flagellin or the protein tubulin?

Correct Answer
verified

If the organelles of an animal cell were separated by centrifugation, which organelles would require the least centrifugal force to settle to the bottom of the centrifuge tube?

Correct Answer
verified

A cultured cell line appears to be having trouble surviving.Upon closer examination, you find that the cells do not appear to have normal chromosome separation.Based on this observation, you decide to check for the presence of a mutated protein.You will be sure to analyze the gene for which protein?

Correct Answer
verified

Sketch a prokaryotic cell and label at least six of its main features.

Correct Answer
verified

Exam 5: Cells: the Working Units of Life

What type of agent would be most likely to disrupt the structures of microvilli?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which is a function of a plant cell vacuole?

Correct AnswerverifiedShow Answer

A mutant cell line is compared with a nonmutant cell line of the same type.The nonmutant cells secrete the steroid estrogen, but the mutant cells do not.Where should a researcher look to determine whether the mutant cells' defect is in the excretion of the hormone or in its synthesis?

Correct AnswerverifiedShow Answer

A dye is injected into one plant cell and is observed to travel into adjacent plant cells.The dye is traveling between cells through

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

You discover what looks to be a new organelle that is smaller than a mitochondrion, but you need to do further testing to best determine its cellular function.What would be your best plan of action?

Correct AnswerverifiedShow Answer

The diagram below shows a cutaway side view of a plant cell wall and cell membrane. Which biological function is emphasized by the structure shown?

Correct AnswerverifiedShow Answer

The _______ is the fundamental unit of life.

Correct AnswerverifiedShow Answer

Which statement is true concerning endosymbiosis?

Correct AnswerverifiedShow Answer

Microvilli are supported by a network of which type of structure?

Correct AnswerverifiedShow Answer

Which statement about the nuclear envelope is true?

Correct AnswerverifiedShow Answer

Transport of cytoplasmic materials between plant cells is facilitated by

Correct AnswerverifiedShow Answer

A cancer drug is being tested, and it is found that although the cancer cells can divide, the nuclear envelope cannot re-form.It is determined that a protein substance is sequestered so that it cannot be polymerized into the necessary structure.What is the most likely protein target of the drug?

Correct AnswerverifiedShow Answer

A ribosome is a cell structure but is not considered an organelle because it

Correct AnswerverifiedShow Answer

When you cut an orange in half, you _______ the surface area-to-volume ratio.

Correct AnswerverifiedShow Answer

Which technique could you use to determine whether the flagellum-like structure you are observing is made of the protein flagellin or the protein tubulin?

Correct AnswerverifiedShow Answer

If the organelles of an animal cell were separated by centrifugation, which organelles would require the least centrifugal force to settle to the bottom of the centrifuge tube?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Sketch a prokaryotic cell and label at least six of its main features.

Correct AnswerverifiedShow Answer

Correct Answer
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