Question 1

The membrane surrounding each organelle

Accepted Answer

A)   is composed of hydrophobic proteins.
B)   regulates traffic into and out of the cell.
C)   is studded with ribosomes.
D)   allows for interactions among molecules.
E)   is perforated with pores.

Question 2

Archaea and Bacteria do not typically have membrane-enclosed internal compartments; therefore, they are known as _______.

Accepted Answer

The answer of Archaea and Bacteria do not typically have...

Question 3

A specialized structure found in some prokaryotes is the

Accepted Answer

A)   cell wall.
B)   ribosome.
C)   cytosol.
D)   mitochondrion.
E)   chloroplast.

Question 4

The carotenoid pigments that give ripe tomatoes their red color are contained in organelles called

Accepted Answer

A)   chloroplasts.
B)   proplastids.
C)   protoplasts.
D)   leucoplasts.
E)   chromoplasts.

Question 5

The fundamental unit of life is the _______.

Accepted Answer

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

Question 6

The folds of the inner mitochondrial membrane

Accepted Answer

A)   increase the volume of the mitochondrial matrix.
B)   create membrane-enclosed compartments within the mitochondrion.
C)   increase the surface area for the exchange of substances across the membrane.
D)   anchor the mitochondrial DNA.
E)   have no known purpose.

Question 7

Steroids, fatty acids, and phospholipids are synthesized in the _______.

Accepted Answer

The answer of Steroids, fatty acids, and phospholipids are synthesized...

Question 8

Chromatin is a series of entangled threads composed of

Accepted Answer

A)   microtubules.
B)   DNA and protein.
C)   fibrous proteins.
D)   cytoskeleton.
E)   membranes.

Question 9

Which of the following is not a characteristic of a prokaryotic cell?

Accepted Answer

A)   A plasma membrane
B)   A nuclear envelope
C)   A nucleoid
D)   Ribosomes
E)   Enzymes

Question 10

Cells that synthesize a large amount of protein, such as _______ cells, are packed with rough endoplasmic reticulum.

Accepted Answer

A)   liver
B)   glandular
C)   red blood
D)   skin
E)   brain

Question 11

The organelle with many folds, called cristae, is the _______.

Accepted Answer

The answer of The organelle with many folds, called cristae,...

Question 12

Which one of the following organelles is thought to have arisen from an endosymbiotic relationship with a prokaryote?

Accepted Answer

A)   Mitochondria
B)   Nuclei
C)   Golgi apparatus
D)   Lysosomes
E)   Peroxisomes

Question 13

The Golgi apparatus

Accepted Answer

A)   is found only in animals.
B)   is found in prokaryotes.
C)   is the appendage that moves a cell around in its environment.
D)   is a site of rapid ATP production.
E)   modifies and packages proteins.

Question 14

Specialized cellular appendages of prokaryotes that help bacteria adhere to one another when they exchange genetic material are called

Accepted Answer

A)   the Golgi apparatus.
B)   cilia.
C)   flagella.
D)   pili.
E)   b, c, and d

Question 15

The packaging of proteins to be used outside the cell occurs in the

Accepted Answer

A)   nucleus.
B)   SER.
C)   Golgi apparatus.
D)   chromoplast.
E)   nuclear pore.

Question 16

A large organelle found in eukaryotic cells that genetically controls the cell's activities is the

Accepted Answer

A)   chloroplast.
B)   nucleus.
C)   flagellum.
D)   vacuole.
E)   centriole.

Question 17

The three principle tenets of biology-that all organisms are composed of cells, that all cells come from preexisting cells, and that cells are the fundamental units of life-make up the unifying principle known as the _______.

Accepted Answer

The answer of The three principle tenets of biology-that all...

Question 18

Microscopes are used to resolve images that cannot be seen with the unaided eye. Electron microscopes use _______ to resolve images, whereas light microscopes use _______ to resolve images.

Accepted Answer

A)   light and lenses; diffraction of electron beams
B)   diffraction of electron beams; light and lenses
C)   lasers; light and lenses
D)   light and lenses; lasers
E)   None of the above

Question 19

The cellular structures that are almost identical to centrioles are the

Accepted Answer

A)   basal bodies.
B)   microbodies.
C)   chromoplasts.
D)   microfilaments.
E)   centromeres.

Question 20

A mass of cells is found in the sediment surrounding a thermal vent in the ocean floor. The salinity in the area is quite high. Microscopic examination of the cells reveals no evidence of membrane-enclosed organelles. This cell would be classified as a

Accepted Answer

A)   eukaryotic cell.
B)   prokaryotic cell.
C)   member of domain Archaea or Bacteria.
D)   Both a and c
E)   Both b and c

Exam 5: Cells: the Working Units of Life

The three principle tenets of biology-that all organisms are composed of cells, that all cells come from preexisting cells, and that cells are the fundamental units of life-make up the unifying principle known as the _______.

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The fundamental unit of life is the _______.

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Archaea and Bacteria do not typically have membrane-enclosed internal compartments; therefore, they are known as _______.

Correct AnswerverifiedShow Answer

A large organelle found in eukaryotic cells that genetically controls the cell's activities is the

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A specialized structure found in some prokaryotes is the

Correct AnswerverifiedShow Answer

The packaging of proteins to be used outside the cell occurs in the

Correct AnswerverifiedShow Answer

Steroids, fatty acids, and phospholipids are synthesized in the _______.

Correct AnswerverifiedShow Answer

The carotenoid pigments that give ripe tomatoes their red color are contained in organelles called

Correct AnswerverifiedShow Answer

The cellular structures that are almost identical to centrioles are the

Correct AnswerverifiedShow Answer

The organelle with many folds, called cristae, is the _______.

Correct AnswerverifiedShow Answer

A mass of cells is found in the sediment surrounding a thermal vent in the ocean floor. The salinity in the area is quite high. Microscopic examination of the cells reveals no evidence of membrane-enclosed organelles. This cell would be classified as a

Correct AnswerverifiedShow Answer

The membrane surrounding each organelle

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Specialized cellular appendages of prokaryotes that help bacteria adhere to one another when they exchange genetic material are called

Correct AnswerverifiedShow Answer

Which one of the following organelles is thought to have arisen from an endosymbiotic relationship with a prokaryote?

Correct AnswerverifiedShow Answer

The folds of the inner mitochondrial membrane

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Which of the following is not a characteristic of a prokaryotic cell?

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Microscopes are used to resolve images that cannot be seen with the unaided eye. Electron microscopes use _______ to resolve images, whereas light microscopes use _______ to resolve images.

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The Golgi apparatus

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Cells that synthesize a large amount of protein, such as _______ cells, are packed with rough endoplasmic reticulum.

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Chromatin is a series of entangled threads composed of

Correct AnswerverifiedShow Answer

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Microscopes are used to resolve images that cannot be seen with the unaided eye. Electron microscopes use _ to resolve images, whereas light microscopes use _ to resolve images.

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