Question 1

Which of the following statements concerning bacteria and archaea cells is correct?

Accepted Answer

A)   Archaea cells contain small membrane-enclosed organelles; bacteria do not.
B)   Archaea cells contain a membrane-bound nucleus; bacteria do not.
C)   DNA is present in both archaea cells and bacteria cells.
D)   DNA is present in the mitochondria of both bacteria and archaea cells.E) B) and D)
F) A) and B)

Question 2

If radioactive deoxythymidine triphosphate (dTTP) is added to a culture of rapidly growing bacterial cells, where in the cell would you expect to find the greatest concentration of radioactivity?

Accepted Answer

A)   nucleus
B)   cytoplasm
C)   endoplasmic reticulum
D)   nucleoid
E)   ribosomesF) A) and B)
G) B) and E)

Question 3

-The differences among the three categories of cytoskeletal elements outlined in the table above would suggest that each of the following has specialized roles. Which of the following is a correct match? (All three elements are involved in the maintenance of cell shape.)

Accepted Answer

A)   microfilaments and the nuclear lamina
B)   microtubules and cleavage furrow formation
C)   microfilaments and ciliary motion
D)   intermediate filaments and cytoplasmic streaming
E)   microtubules and chromosome movementF) B) and C)
G) A) and C)

Question 4

Which structure-function pair is mismatched?

Accepted Answer

A)   nucleolus; production of ribosomal subunits
B)   lysosome; intracellular digestion
C)   ribosome; protein synthesis
D)   Golgi; protein trafficking
E)   microtubule; muscle contractionF) A) and B)
G) A) and E)

Question 5

The evolution of eukaryotic cells most likely involved

Accepted Answer

A)   endosymbiosis of an aerobic bacterium in a larger host cell-the endosymbiont evolved into mitochondria.
B)   anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen-the anaerobic bacterium evolved into chloroplasts.
C)   an endosymbiotic fungal cell evolved into the nucleus.
D)   acquisition of an endomembrane system, and subsequent evolution of mitochondria from a portion of the Golgi.E) A) and B)
F) A) and C)

Question 6

The nuclear lamina is an array of filaments on the inner side of the nuclear membrane. If a method were found that could cause the lamina to fall into disarray, what would you expect to be the most likely consequence?

Accepted Answer

A)   the loss of all nuclear function
B)   the inability of the nucleus to divide during cell division
C)   a change in the shape of the nucleus
D)   failure of chromosomes to carry genetic information
E)   inability of the nucleus to keep out destructive chemicalsF) A) and E)
G) A) and D)

Question 7

The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that

Accepted Answer

A)   plant cells are capable of having a much higher surface-to-volume ratio than animal cells.
B)   plant cells have a much more highly convoluted (folded)  plasma membrane than animal cells.
C)   plant cells contain a large vacuole that reduces the volume of the cytoplasm.
D)   animal cells are more spherical, whereas plant cells are elongated.
E)   plant cells can have lower surface-to-volume ratios than animal cells because plant cells synthesize their own nutrients.F) A) and E)
G) A) and B)

Question 8

A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in its

Accepted Answer

A)   nuclear lamina and nuclear matrix.
B)   nuclear matrix and extracellular matrix.
C)   mitochondria and Golgi apparatus.
D)   Golgi apparatus and extracellular matrix.
E)   nuclear pores and secretory vesicles.F) C) and D)
G) C) and E)

Question 9

Which structure is common to plant and animal cells?

Accepted Answer

A)   chloroplast
B)   wall made of cellulose
C)   central vacuole
D)   mitochondrion
E)   centrioleF) A) and B)
G) A) and C)

Question 10

A mycoplasma is an organism with a diameter between 0.1 and 1.0 µm. What does the organism's size tell you about how it might be classified?

Accepted Answer

A)   It must be a single-celled protist.
B)   It must be a single-celled fungus.
C)   It could be almost any typical bacterium.
D)   It could be a typical virus.
E)   It could be a very small bacterium.F) A) and B)
G) A) and C)

Question 11

Thylakoids, DNA, and ribosomes are all components found in

Accepted Answer

A)   vacuoles.
B)   chloroplasts.
C)   mitochondria.
D)   lysosomes.
E)   nuclei.F) C) and E)
G) All of the above

Question 12

How does the cell multiply its peroxisomes?

Accepted Answer

A)   They bud off from the Golgi.
B)   They are brought into the cell from the environment.
C)   They are built de novo from cytosol materials.
D)   They split in two after they become sufficiently large.
E)   The cell synthesizes hydrogen peroxide and encloses it in a membrane.F) A) and C)
G) A) and E)

Question 13

A cell with a predominance of free ribosomes is most likely

Accepted Answer

A)   producing primarily proteins for secretion.
B)   producing primarily cytoplasmic proteins.
C)   constructing an extensive cell wall or extracellular matrix.
D)   digesting large food particles.
E)   enlarging its vacuole.F) A) and C)
G) A) and D)

Question 14

The extracellular matrix is thought to participate in the regulation of animal cell behavior by communicating information from the outside to the inside of the cell via which of the following?

Accepted Answer

A)   gap junctions
B)   the nucleus
C)   DNA and RNA
D)   integrins
E)   plasmodesmataF) B) and C)
G) A) and B)

Question 15

Green fluorescent protein (GFP) can be used to fluorescently label a specific protein in cells by genetically engineering cells to synthesize the target protein fused to GFP. What is the advantage of using GFP fusions to visualize specific proteins, instead of staining cells with fluorescently labeled probes that bind to the target protein?

Accepted Answer

A)   GFP fusions enable one to track changes in the location of the protein in living cells; staining usually requires preserved cells.
B)   GFP fusions enable higher resolution than staining with fluorescent probes.
C)   GFP permits the position of the protein in the cell more precisely than fluorescent probes.
D)   GFP permits visualization of protein-protein interactions; fluorescent probes do not.
E)   GFP fusions are not subject to artifacts; fluorescent probes may introduce background artifacts.F) A) and C)
G) C) and E)

Question 16

All of the following are part of a prokaryotic cell except

Accepted Answer

A)   DNA.
B)   a cell wall.
C)   a plasma membrane.
D)   ribosomes.
E)   an endoplasmic reticulum.F) C) and D)
G) B) and E)

Question 17

Which organelle or structure is absent in plant cells?

Accepted Answer

A)   mitochondria
B)   Golgi vesicles
C)   microtubules
D)   centrosomes
E)   peroxisomesF) None of the above
G) B) and D)

Question 18

All of the following serve an important role in determining or maintaining the structure of plant cells. Which of the following are distinct from the others in their composition?

Accepted Answer

A)   microtubules
B)   microfilaments
C)   plant cell walls
D)   intermediate filaments
E)   nuclear laminaF) A) and D)
G) A) and C)

Question 19

A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from

Accepted Answer

A)   a bacterium.
B)   an animal, but not a plant.
C)   nearly any eukaryotic organism.
D)   any multicellular organism, like a plant or an animal.
E)   any kind of organism.F) D) and E)
G) All of the above

Question 20

The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by

Accepted Answer

A)   the physical separation of most membranes from each other.
B)   the transportation of membrane lipids among the endomembrane system by small membrane vesicles.
C)   the function of the Golgi apparatus in sorting and directing membrane components.
D)   the modification of the membrane components once they reach their final destination.
E)   the synthesis of different lipids and proteins in each of the organelles of the endomembrane system.F) A) and B)
G) C) and D)

Exam 6: A Tour of the Cell

All of the following are part of a prokaryotic cell except

Correct Answer
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Which structure is common to plant and animal cells?

Correct Answer
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Which organelle or structure is absent in plant cells?

Correct Answer
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The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that

Correct Answer
verified

The nuclear lamina is an array of filaments on the inner side of the nuclear membrane. If a method were found that could cause the lamina to fall into disarray, what would you expect to be the most likely consequence?

Correct Answer
verified

A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in its

Correct Answer
verified

Correct Answer
verified

Thylakoids, DNA, and ribosomes are all components found in

Correct Answer
verified

How does the cell multiply its peroxisomes?

Correct Answer
verified

Which structure-function pair is mismatched?

Correct Answer
verified

A cell with a predominance of free ribosomes is most likely

Correct Answer
verified

A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from

Correct Answer
verified

The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by

Correct Answer
verified

-The differences among the three categories of cytoskeletal elements outlined in the table above would suggest that each of the following has specialized roles. Which of the following is a correct match? (All three elements are involved in the maintenance of cell shape.)

Correct Answer
verified

The evolution of eukaryotic cells most likely involved

Correct Answer
verified

The extracellular matrix is thought to participate in the regulation of animal cell behavior by communicating information from the outside to the inside of the cell via which of the following?

Correct Answer
verified

Which of the following statements concerning bacteria and archaea cells is correct?

Correct Answer
verified

A mycoplasma is an organism with a diameter between 0.1 and 1.0 µm. What does the organism's size tell you about how it might be classified?

Correct Answer
verified

All of the following serve an important role in determining or maintaining the structure of plant cells. Which of the following are distinct from the others in their composition?

Correct Answer
verified

If radioactive deoxythymidine triphosphate (dTTP) is added to a culture of rapidly growing bacterial cells, where in the cell would you expect to find the greatest concentration of radioactivity?

Correct Answer
verified

Exam 6: A Tour of the Cell

All of the following are part of a prokaryotic cell except

Correct AnswerverifiedShow Answer

Which structure is common to plant and animal cells?

Correct AnswerverifiedShow Answer

Which organelle or structure is absent in plant cells?

Correct AnswerverifiedShow Answer

The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that

Correct AnswerverifiedShow Answer

The nuclear lamina is an array of filaments on the inner side of the nuclear membrane. If a method were found that could cause the lamina to fall into disarray, what would you expect to be the most likely consequence?

Correct AnswerverifiedShow Answer

A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in its

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Thylakoids, DNA, and ribosomes are all components found in

Correct AnswerverifiedShow Answer

How does the cell multiply its peroxisomes?

Correct AnswerverifiedShow Answer

Which structure-function pair is mismatched?

Correct AnswerverifiedShow Answer

A cell with a predominance of free ribosomes is most likely

Correct AnswerverifiedShow Answer

A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from

Correct AnswerverifiedShow Answer

The difference in lipid and protein composition between the membranes of the endomembrane system is largely determined by

Correct AnswerverifiedShow Answer

-The differences among the three categories of cytoskeletal elements outlined in the table above would suggest that each of the following has specialized roles. Which of the following is a correct match? (All three elements are involved in the maintenance of cell shape.)

Correct AnswerverifiedShow Answer

The evolution of eukaryotic cells most likely involved

Correct AnswerverifiedShow Answer

The extracellular matrix is thought to participate in the regulation of animal cell behavior by communicating information from the outside to the inside of the cell via which of the following?

Correct AnswerverifiedShow Answer

Which of the following statements concerning bacteria and archaea cells is correct?

Correct AnswerverifiedShow Answer

A mycoplasma is an organism with a diameter between 0.1 and 1.0 µm. What does the organism's size tell you about how it might be classified?

Correct AnswerverifiedShow Answer

All of the following serve an important role in determining or maintaining the structure of plant cells. Which of the following are distinct from the others in their composition?

Correct AnswerverifiedShow Answer

If radioactive deoxythymidine triphosphate (dTTP) is added to a culture of rapidly growing bacterial cells, where in the cell would you expect to find the greatest concentration of radioactivity?

Correct AnswerverifiedShow Answer

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