Question 1

An amino sugar called N-acetylmuramic acid is an important building block of the cell wall of some bacteria.Penicillin prevents this amino sugar from being incorporated into the bacterial cell wall.Based on this information,select all the of the following statements that are true.

Accepted Answer

A)  Penicillin affects bacteria but not eukaryotic animal cells.
B)  Bacterial cells that had already formed their cell walls would be unaffected.
C)  Penicillin would stop the growth of active colonies of susceptible bacteria.
D)  Penicillin affects bacterial cell walls and eukaryotic plant cell walls.E) B) and C)
F) A) and B)

Question 2

Membrane-bounded vesicles that contain enzymes that break down fatty acids while producing hydrogen peroxide as a waste product are called

Accepted Answer

A)  vacuoles.
B)  vesicles.
C)  glyoxysomes.
D)  lysosomes.
E)  peroxisomes.F) B) and C)
G) A) and B)

Question 3

DNA is housed within the nucleus,but the mRNA code needs to leave in order to be translated into a protein.How does the mRNA code leave the nucleus if the nucleus is surrounded by the nuclear envelope?

Accepted Answer

A)  The nuclear envelope dissolves in order to allow the mRNA code to leave.
B)  The nuclear envelope contains pores which provide passage for the mRNA.
C)  A vesicle will bud off from the nuclear envelope containing the mRNA.
D)  The mRNA will be coded into a protein within the nucleus.Then the protein leaves the nucleus.E) A) and B)
F) A) and C)

Question 4

The central vacuole

Accepted Answer

A)  provides the plant cell with support.
B)  stores nutrients and cellular waste products.
C)  is a reservoir for water.
D)  All of the choices are correct.E) None of the above
F) B) and C)

Question 5

Which of the following organelles is found in autotrophic eukaryotic cells but not heterotrophic eukaryotic cells?

Accepted Answer

A)  lysosomes
B)  ribosomes
C)  rough endoplasmic reticulum
D)  chloroplast
E)  mitochondriaF) C) and E)
G) B) and E)

Question 6

During the sequencing of DNA into a protein,what is the first step?

Accepted Answer

A)  mRNA is copied from a gene.
B)  A ribosome attaches to the mRNA and signals protein synthesis.
C)  SRP binds to the signal peptide to shut down synthesis.
D)  An enzyme removes the signal peptide from the peptide chain.E) B) and C)
F) A) and C)

Question 7

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes.

-What figure has the greatest surface area (height x width x number of sides x number of cubes) ?

Accepted Answer

A)  Figure A
B)  Figure B
C)  Figure C
D)  All of these are the same.E) A) and D)
F) A) and C)

Question 8

Which of the following is NOT offered as evidence in support of the endosymbiotic theory,which proposes that eukaryotic cells have evolved as a "committee" of prokaryotic cells?

Accepted Answer

A)  Mitochondria and chloroplasts are similar in size and structure to some species of bacteria.
B)  The ribosomes of chloroplasts and mitochondria are similar to bacteria.
C)  Mitochondria and chloroplasts can actively break away from eukaryotic cells and live on their own.
D)  Mitochondria and chloroplasts have their own DNA coding separate from the eukaryotic nucleus.
E)  All of the choices offer support of the endosymbiotic theory.F) A) and B)
G) C) and D)

Question 9

As they flow over rotten logs,slime molds appear to lack any partitioning into individual cells; however,slime molds do become cellular when they change form to produce spores.In light of the cell theory that "all living things are composed of cells," then

Accepted Answer

A)  these tissues are not living because they are not cellular.
B)  these tissues are a bridge between nonliving and primitive living cells.
C)  the general concept still holds because these organisms are cellular at specific stages in their life cycle.
D)  this proves that a "vital force" beyond cell chemistry can give life to substances.E) A) and B)
F) None of the above

Question 10

Mitochondria and chloroplasts are able to reproduce independently from the division of the cell.

Accepted Answer

A) True 
 B)False

Question 11

A researcher is studying the effects of a new drug on the endomembrane system.She notices the Golgi apparatus is not receiving any proteins and that it is not able to ship any proteins.What part of the endomembrane system was probably affected by this new drug?

Accepted Answer

A)  mitochondria
B)  smooth endoplasmic reticulum
C)  ribosomes
D)  nucleus
E)  vesiclesF) B) and E)
G) A) and E)

Question 12

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes.

-If the figures represented cells,what size cell has the greatest potential to bring nutrients in and rid itself of waste?

Accepted Answer

A)  The cell in Figure A.
B)  The individual cells in Figure B.
C)  The individual cells in Figure C.
D)  All cells have the same potential.E) None of the above
F) A) and B)

Question 13

Cell biologists have introduced radioactively labeled carbohydrates,fats,and amino acids to living cells,allowed time for cell metabolism,and then placed the cells in a blender and separated out the various cell organelles from the cytoplasm.They found the radioactive molecules could soon be detected as part of various cellular compounds,although the visible cell structures appeared unchanged.Which of the following is the best conclusion based on this information?

Accepted Answer

A)  These "food" molecules are used only for energy.
B)  Most cell components are constantly being broken down and rebuilt.
C)  Radioactivity was transferred from the introduced molecules to the resident stable molecules.
D)  Molecules diffuse at random through the cytoplasm and into cell organelles.
E)  Radioactivity has an unusual role in the metabolism of living cells.F) None of the above
G) B) and C)

Question 14

Which of the following is true regarding the surface area-to-volume ratio needed for cells to function properly?

Accepted Answer

A)  A large surface-area-to-volume ratio is needed to furnish nutrients to and expel wastes from the volume (cytoplasm) .
B)  The surface area should be equal to the volume of cell in order to adequately bring nutrients in and get rid of waste.
C)  The volume of the cell should be larger than the surface area to ensure that all waste products are effectively removed from the cell.
D)  The surface-area-to-volume ratio changes constantly.Sometimes the surface area is greater and other times the volume is bigger.E) None of the above
F) A) and B)

Question 15

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes.

-Which figure has the greatest surface-area-to-volume ratio?

Accepted Answer

A)  Figure A
B)  Figure B
C)  Figure C
D)  All of these are the same.E) A) and B)
F) None of the above

Exam 4: Cell Structure and Function

Membrane-bounded vesicles that contain enzymes that break down fatty acids while producing hydrogen peroxide as a waste product are called

Correct Answer
verified

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -If the figures represented cells,what size cell has the greatest potential to bring nutrients in and rid itself of waste?

Correct Answer
verified

As they flow over rotten logs,slime molds appear to lack any partitioning into individual cells; however,slime molds do become cellular when they change form to produce spores.In light of the cell theory that "all living things are composed of cells," then

Correct Answer
verified

A researcher is studying the effects of a new drug on the endomembrane system.She notices the Golgi apparatus is not receiving any proteins and that it is not able to ship any proteins.What part of the endomembrane system was probably affected by this new drug?

Correct Answer
verified

DNA is housed within the nucleus,but the mRNA code needs to leave in order to be translated into a protein.How does the mRNA code leave the nucleus if the nucleus is surrounded by the nuclear envelope?

Correct Answer
verified

Which of the following is NOT offered as evidence in support of the endosymbiotic theory,which proposes that eukaryotic cells have evolved as a "committee" of prokaryotic cells?

Correct Answer
verified

During the sequencing of DNA into a protein,what is the first step?

Correct Answer
verified

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -Which figure has the greatest surface-area-to-volume ratio?

Correct Answer
verified

Which of the following is true regarding the surface area-to-volume ratio needed for cells to function properly?

Correct Answer
verified

Mitochondria and chloroplasts are able to reproduce independently from the division of the cell.

Correct Answer
verified

The central vacuole

Correct Answer
verified

Correct Answer
verified

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -What figure has the greatest surface area (height x width x number of sides x number of cubes) ?

Correct Answer
verified

Which of the following organelles is found in autotrophic eukaryotic cells but not heterotrophic eukaryotic cells?

Correct Answer
verified

An amino sugar called N-acetylmuramic acid is an important building block of the cell wall of some bacteria.Penicillin prevents this amino sugar from being incorporated into the bacterial cell wall.Based on this information,select all the of the following statements that are true.

Correct Answer
verified

Exam 4: Cell Structure and Function

Membrane-bounded vesicles that contain enzymes that break down fatty acids while producing hydrogen peroxide as a waste product are called

Correct AnswerverifiedShow Answer

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -If the figures represented cells,what size cell has the greatest potential to bring nutrients in and rid itself of waste?

Correct AnswerverifiedShow Answer

As they flow over rotten logs,slime molds appear to lack any partitioning into individual cells; however,slime molds do become cellular when they change form to produce spores.In light of the cell theory that "all living things are composed of cells," then

Correct AnswerverifiedShow Answer

A researcher is studying the effects of a new drug on the endomembrane system.She notices the Golgi apparatus is not receiving any proteins and that it is not able to ship any proteins.What part of the endomembrane system was probably affected by this new drug?

Correct AnswerverifiedShow Answer

DNA is housed within the nucleus,but the mRNA code needs to leave in order to be translated into a protein.How does the mRNA code leave the nucleus if the nucleus is surrounded by the nuclear envelope?

Correct AnswerverifiedShow Answer

Which of the following is NOT offered as evidence in support of the endosymbiotic theory,which proposes that eukaryotic cells have evolved as a "committee" of prokaryotic cells?

Correct AnswerverifiedShow Answer

During the sequencing of DNA into a protein,what is the first step?

Correct AnswerverifiedShow Answer

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -Which figure has the greatest surface-area-to-volume ratio?

Correct AnswerverifiedShow Answer

Which of the following is true regarding the surface area-to-volume ratio needed for cells to function properly?

Correct AnswerverifiedShow Answer

Mitochondria and chloroplasts are able to reproduce independently from the division of the cell.

Correct AnswerverifiedShow Answer

The central vacuole

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -What figure has the greatest surface area (height x width x number of sides x number of cubes) ?

Correct AnswerverifiedShow Answer

Which of the following organelles is found in autotrophic eukaryotic cells but not heterotrophic eukaryotic cells?

Correct AnswerverifiedShow Answer

An amino sugar called N-acetylmuramic acid is an important building block of the cell wall of some bacteria.Penicillin prevents this amino sugar from being incorporated into the bacterial cell wall.Based on this information,select all the of the following statements that are true.

Correct AnswerverifiedShow Answer

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