Question 1

Resolution is the

Accepted Answer

A)  size of an image.
B)  ability of an optical instrument to show two close objects as separate.
C)  distance between the lenses of a microscope.
D)  ability of an optical instrument to magnify an image.E) A) and B)
F) A) and C)

Question 2

In the plasma membrane,the phospholipid heads

Accepted Answer

A)  are hydrophilic and face outward towards the aqueous solution on both sides of the membrane
B)  are hydrophobic and face inward,shielded from water
C)  are hydrophilic and face inward,shielded from water
D)  are hydrophobic and face outward towards the aqueous solution on both sides of the membraneE) C) and D)
F) None of the above

Question 3

Which of the following statements about cells is true?

Accepted Answer

A)  All cells have cell walls.
B)  All cells are motile.
C)  All cells are attached to other cells.
D)  All cells have internal structures that move.E) None of the above
F) A) and B)

Question 4

Which part of the mitochondrion shown enhances its ability to produce ATP by increasing the surface area of a mitochondrial membrane?

Accepted Answer

A)  structure A
B)  structure B
C)  structure C
D)  structure DE) A) and B)
F) A) and C)

Question 5

The endosymbiosis hypothesis proposes that

Accepted Answer

A)  two cells merged into one cell,improving the enzyme function of the new cell.
B)  a large cell engulfed and digested a smaller cell,exposing its enzymes for use by the larger cell.
C)  two cells were juxtaposed and one benefited from the other.
D)  a small cell lived inside a larger cell to the benefit of both cells.E) C) and D)
F) B) and C)

Question 6

During cell reproduction,chromatin fibers coil up into structures called

Accepted Answer

A)  lysosomes.
B)  nucleoli.
C)  ribosomes.
D)  chromosomes.E) A) and C)
F) A) and B)

Question 7

Unlike animal cells,plant cells have and .Unlike plant cells,animal cells have .

Accepted Answer

A)  chloroplasts ...cell walls ...centrioles
B)  chloroplasts ...cell walls ...a nucleus
C)  centrioles ...chloroplasts ...cell walls
D)  centrioles ...cell walls ...large central vacuolesE) A) and C)
F) A) and D)

Question 8

A scientist wants to magnify a pollen grain 8,000 times and examine the ridges and pores on its surface.Which one of the following instruments would be best?

Accepted Answer

A)  a fluorescence confocal microscope
B)  a transmission electron microscope
C)  an inverted light microscope
D)  a scanning electron microscopeE) B) and C)
F) None of the above

Question 9

Mitochondria differ from chloroplasts in that mitochondria

Accepted Answer

A)  convert light energy from the sun to chemical energy,whereas chloroplasts convert one form of chemical energy to another.
B)  contain three different membrane- bound compartments,whereas chloroplasts contain two.
C)  are not found in plants,whereas chloroplasts are not found in animals.
D)  contain membrane folds called cristae,whereas chloroplasts contain disk- like vesicles in stacks called grana.E) C) and D)
F) A) and C)

Question 10

Which of the following structures is exclusively associated with prokaryotic cells?

Accepted Answer

A)  chromosome
B)  ribosomes
C)  nucleoid
D)  a membrane- bound nucleusE) B) and D)
F) All of the above

Question 11

cells lack a membrane- enclosed nucleus.

Accepted Answer

A)  Eukaryotic
B)  Fungal
C)  Plant
D)  ProkaryoticE) A) and B)
F) A) and C)

Question 12

Secretory proteins are

Accepted Answer

A)  produced by the cell for internal use.
B)  released from the cell through the plasma membrane.
C)  produced by ribosomes on the smooth endoplasmic reticulum.
D)  chemically modified in the nucleus.E) B) and C)
F) B) and D)

Question 13

The Golgi apparatus

Accepted Answer

A)  is composed of stacks of membranous vesicles that are continuous with one another.
B)  strings together amino acids to produce proteins.
C)  stores,modifies,and packages proteins.
D)  is the site of carbohydrate breakdown.E) A) and C)
F) B) and D)

Question 14

The diameter of most animal and plant cells ranges from

Accepted Answer

A)  10 to 100 micrometers.
B)  1.0 to 10 micrometers.
C)  100 to 1000 micrometers.
D)  0.1 to 1.0 micrometers.E) A) and B)
F) A) and C)

Question 15

Protein synthesis requires the use of mRNA,which

Accepted Answer

A)  carries the message to the nucleus to synthesize new DNA during cell division.
B)  is translated by the ribosomes into the amino acid sequences of proteins.
C)  is made in the nucleolus.
D)  must be made by the ribosomes.E) B) and C)
F) A) and D)

Question 16

The nucleus of a cell

Accepted Answer

A)  is surrounded by a single layer of membrane.
B)  is the primary location of protein synthesis.
C)  is contained within the nucleolus.
D)  contains DNA.E) None of the above
F) A) and B)

Question 17

Which of the following statements about electron microscopes is true?

Accepted Answer

A)  Scanning electron microscopes are used to study the details of internal cell structure.
B)  Transmission electron microscopes are mainly used to study cell surfaces.
C)  Electron microscopes focus electron beams to create a magnified image of an object.
D)  Specimens must be sectioned to be viewed under a scanning electron microscope.E) B) and C)
F) A) and D)

Question 18

Microfilaments differ from microtubules in that microfilaments

Accepted Answer

A)  are thicker than microtubules.
B)  are found only in plants,whereas microtubules are found in both plant and animal cells.
C)  help to anchor organelles,whereas microtubules primarily function to help cells change shape and move.
D)  are mainly composed of actin,whereas microtubules are composed of tubulin.E) All of the above
F) None of the above

Question 19

When a cell is deprived of oxygen,its lysosomes tend to burst and release their contents into the cell.As a result of this,that cell will

Accepted Answer

A)  produce replacement lysosomes.
B)  undergo cell division.
C)  recycle damaged organelles.
D)  undergo self- digestion and die.E) A) and B)
F) A) and C)

Question 20

Cilia differ from flagella in that

Accepted Answer

A)  the protein filaments of cilia are "naked," while those of flagella are wrapped in an extension of the cell membrane.
B)  cilia are typically more numerous and shorter than flagella.
C)  cilia are anchored only in the proteins of the cell membrane,while flagella are anchored in a special structure called the basal body.
D)  cilia contain nine microtubule doublets surrounding a central pair of microtubules,while flagella contain only nine microtubule doublets.E) A) and B)
F) A) and C)

Exam 4: A Tour of the Cell

Cilia differ from flagella in that

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Which of the following statements about electron microscopes is true?

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Microfilaments differ from microtubules in that microfilaments

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When a cell is deprived of oxygen,its lysosomes tend to burst and release their contents into the cell.As a result of this,that cell will

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The endosymbiosis hypothesis proposes that

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Which part of the mitochondrion shown enhances its ability to produce ATP by increasing the surface area of a mitochondrial membrane?

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Which of the following statements about cells is true?

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The Golgi apparatus

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cells lack a membrane- enclosed nucleus.

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The nucleus of a cell

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Protein synthesis requires the use of mRNA,which

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A scientist wants to magnify a pollen grain 8,000 times and examine the ridges and pores on its surface.Which one of the following instruments would be best?

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Mitochondria differ from chloroplasts in that mitochondria

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Resolution is the

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Which of the following structures is exclusively associated with prokaryotic cells?

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Secretory proteins are

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In the plasma membrane,the phospholipid heads

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During cell reproduction,chromatin fibers coil up into structures called

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Unlike animal cells,plant cells have and .Unlike plant cells,animal cells have .

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The diameter of most animal and plant cells ranges from

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