Question 1

Your skeletal muscle cells use calcium ions to stimulate muscle contraction.To prevent a constant state of contraction,these calcium ions are stored in between contractions and released into the cytoplasm for a contraction.The structures used for storing the calcium ions are

Accepted Answer

A)   organelles derived from neighboring cells.
B)   highly derived mitochondria that can also provide ATP.
C)   extensions of the Golgi apparatus.
D)   vesicles budded off from rough ER that do not fuse with the Golgi apparatus.
E)   modifications of smooth ER within the muscle cells.F) B) and C)
G) A) and B)

Question 2

In the process of centrifuging a cell homogenate in a centrifuge tube,the cell structures are separated according to size and _______.

Accepted Answer

The answer of In the process of centrifuging a cell...

Question 3

Certain cells in your pancreas make digestive enzymes that are secreted into ducts and carried to your small intestine.If you looked at these pancreatic cells by electron microscopy,you would expect to see

Accepted Answer

A)   large amounts of rough ER.
B)   multiple nuclei per cell.
C)   large numbers of primary lysosomes.
D)   numerous cilia on the cell surfaces.
E)   few ribosomes but numerous vacuoles.F) A) and D)
G) D) and E)

Question 4

In a plant cell,the genes that code for all the proteins found in a chloroplast are located in the

Accepted Answer

A)   nucleus.
B)   nucleiod.
C)   DNA of the chloroplast.
D)   thylakoids.
E)   nuclear and chloroplast DNA.F) A) and C)
G) C) and E)

Question 5

Refer to the figure below showing a time-lapse series of vesicles being moved along a cytoskeletal structure in the direction of the arrow.The minus (‒) and plus (+) ends of the cytoskeletal structure are indicated.The most likely explanation for the movement of the vesicles is that they are being moved along a(n) _______ by _______.

Accepted Answer

A)   intermediate filament such as a hair;the flowing movement of the cytoplasm
B)   microfilament;cytoplasmic streaming
C)   actin microfilament;a motor protein such as myosin
D)   microtubule;a motor protein such as kinesin
E)   microtubule;a motor protein such as dyneinF) A) and E)
G) A) and D)

Question 6

The figure below shows structures found in a(n) _______.The structures labeled 1,2 and 3 represent _______,_______ and _______,in that order.

Accepted Answer

A)   animal;extracellular fibers;integrin;actin
B)   animal;extracellular fibers;kinesin;microfilaments
C)   plant;cellulose;plasmodesmata;ribosomes
D)   plant;polysaccharides;cross-linked proteins;peroxisomes
E)   bacterium;the peptidoglycan layer;linker-proteins;the cytoskeletonF) A) and B)
G) B) and E) A

Question 7

The folds of the inner mitochondrial membrane

Accepted Answer

A)   increase the volume of the mitochondrial matrix.
B)   decrease the surface-to-volume ratio of the mitochondrion.
C)   create a large membrane surface for reactions within the mitochondrion.
D)   increase the number of ribosomes within the membrane.
E)   enclose the mitochondrial DNA in a double membrane.F) C) and D)
G) B) and E)

Question 8

Mitochondria and chloroplasts differ in that

Accepted Answer

A)   mitochondria contain DNA,but chloroplasts do not.
B)   chloroplasts contain DNA,but mitochondria do not.
C)   mitochondria harvest chemical energy,whereas chloroplasts convert light energy into chemical energy.
D)   mitochondria are enclosed within one membrane,whereas chloroplasts are enclosed within two.
E)   mitochondria have extensive infoldings of membrane,whereas chloroplasts do not have extensive internal membranes.F) A) and D)
G) B) and C)

Question 9

Which of the following represents is the correct arrangement of items in order of size,from smallest to largest?

Accepted Answer

A)   Lipid molecule;carbon atom;bacterium;virus;plant cell
B)   Bacterium;virus;carbon atom;lipid molecule;plant cell
C)   Carbon atom;lipid molecule;virus;bacterium;plant cell
D)   Plant cell;bacterium;virus;carbon atom;lipid molecule
E)   Carbon atom;lipid molecule;bacterium;virus;plant cellF) A) and E)
G) B) and C)

Question 10

As a living cell grows larger,in what ways do its metabolic processes change?

Accepted Answer

A)   Its need for resources increases.
B)   Its rate of waste production decreases.
C)   Movement of substances within the cell becomes faster.
D)   The amount of surface area needed to support its metabolic processes decreases.
E)   Its needs for nutrients decreases.F) C) and D)
G) B) and E)

Question 11

Ribosomes are the structures in which

Accepted Answer

A)   chemical energy is stored in the form of ATP.
B)   cell division is controlled.
C)   genetic information is used to make proteins.
D)   sunlight energy is converted into chemical energy.
E)   new organelles are made.F) B) and D)
G) B) and C)

Question 12

Which molecule will cross a cell membrane most easily?

Accepted Answer

A)   A large molecule such as hemoglobin
B)   A small molecule such as glucose
C)   Genetic material such as DNA
D)   A highly polar molecule such as water
E)   A lipid-soluble substance such as testosteroneF) C) and D)
G) A) and E) E

Question 13

If the inner membrane of a mitochondrion were not folded to create cristae,

Accepted Answer

A)   the mitochondrion would not be able to make as much ATP.
B)   the outer membrane would become as permeable to macromolecules as the inner membrane is.
C)   the production of glucose within the mitochondrion would decrease.
D)   the mitochondrion would not be as efficient at using solar energy to make ATP.
E)   the mitochondrion would not be able to maintain its shape.F) D) and E)
G) B) and D)

Question 14

All cellular membranes

Accepted Answer

A)   regulate which materials can cross the membrane.
B)   support the cell and determine its shape.
C)   produce energy for the cell.
D)   produce proteins for the cell.
E)   move the cell.F) B) and E)
G) C) and D)

Question 15

In mitochondria,the energy from "food" molecules (such as glucose) that is partially broken down in the cytosol is converted to

Accepted Answer

A)   ATP.
B)   CTP.
C)   GTP.
D)   TTP.
E)   UTP.F) B) and E)
G) All of the above

Question 16

Use the following to answer questions :
Refer to the figure below. 
-The electron micrograph shows a portion of a cell.This cell could have come from

Accepted Answer

A)   a bacterium,but not a protist.
B)   an archaeon,but not a bacterium.
C)   a plant,but not an animal.
D)   a plant or animal,but not a bacterium.
E)   an animal,but not a plant.F) B) and C)
G) C) and E) D

Question 17

If you wanted to stain the ribosomes in a cell,you could use a dye that stains

Accepted Answer

A)   carbohydrates.
B)   nucleic acids.
C)   fatty acids.
D)   basic (as opposed to acidic) components.
E)   phospholipids.F) C) and D)
G) A) and B)

Question 18

If a cell needed to increase its surface area without changing its volume in order to carry out cellular processes more efficiently,it could do this most effectively

Accepted Answer

A)   by creating deep invaginations in the cell membrane.
B)   by becoming spherical in shape.
C)   by becoming flatter.
D)   by becoming columnar-shaped (tall and narrow) .
E)   It is impossible for a cell to increase its surface area without changing its volume.F) B) and C)
G) B) and D)

Question 19

What is the major distinction between a prokaryotic and a eukaryotic cell?

Accepted Answer

A)   The DNA in a prokaryotic cell is not separated from the ribosomes.
B)   A prokaryotic cell does not have RNA.
C)   A prokaryotic cell is larger than a eukaryotic cell.
D)   Prokaryotic cells can build tissues but not organs.
E)   A prokaryotic cell is functionally simpler than a eukaryotic cell and its biochemical reactions occur more slowly.F) None of the above
G) B) and D)

Question 20

Most cells are small because

Accepted Answer

A)   a reduced surface area-to-volume ratio increases metabolic rates within the cell.
B)   a larger surface area-to-volume ratio increases the efficiency of processes within the cell.
C)   small cells are able to live longer than large cells.
D)   small cells lose less heat to the environment than large cells.
E)   it is easier to package small cells within a cell wall.F) B) and C)
G) A) and D)

Exam 4: Cells: the Working Units of Life

Your skeletal muscle cells use calcium ions to stimulate muscle contraction.To prevent a constant state of contraction,these calcium ions are stored in between contractions and released into the cytoplasm for a contraction.The structures used for storing the calcium ions are

Correct Answer
verified

In the process of centrifuging a cell homogenate in a centrifuge tube,the cell structures are separated according to size and _______.

Correct Answer
verified

Certain cells in your pancreas make digestive enzymes that are secreted into ducts and carried to your small intestine.If you looked at these pancreatic cells by electron microscopy,you would expect to see

Correct Answer
verified

In a plant cell,the genes that code for all the proteins found in a chloroplast are located in the

Correct Answer
verified

Correct Answer
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The figure below shows structures found in a(n) ___.The structures labeled 1,2 and 3 represent _,_ and ___,in that order.

Correct Answer
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A

The folds of the inner mitochondrial membrane

Correct Answer
verified

Mitochondria and chloroplasts differ in that

Correct Answer
verified

Which of the following represents is the correct arrangement of items in order of size,from smallest to largest?

Correct Answer
verified

As a living cell grows larger,in what ways do its metabolic processes change?

Correct Answer
verified

Ribosomes are the structures in which

Correct Answer
verified

Which molecule will cross a cell membrane most easily?

Correct Answer
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E

If the inner membrane of a mitochondrion were not folded to create cristae,

Correct Answer
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All cellular membranes

Correct Answer
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In mitochondria,the energy from "food" molecules (such as glucose) that is partially broken down in the cytosol is converted to

Correct Answer
verified

Use the following to answer questions : Refer to the figure below. -The electron micrograph shows a portion of a cell.This cell could have come from

Correct Answer
verified
D

If you wanted to stain the ribosomes in a cell,you could use a dye that stains

Correct Answer
verified

If a cell needed to increase its surface area without changing its volume in order to carry out cellular processes more efficiently,it could do this most effectively

Correct Answer
verified

What is the major distinction between a prokaryotic and a eukaryotic cell?

Correct Answer
verified

Most cells are small because

Correct Answer
verified

Exam 4: Cells: the Working Units of Life

Your skeletal muscle cells use calcium ions to stimulate muscle contraction.To prevent a constant state of contraction,these calcium ions are stored in between contractions and released into the cytoplasm for a contraction.The structures used for storing the calcium ions are

Correct AnswerverifiedShow Answer

In the process of centrifuging a cell homogenate in a centrifuge tube,the cell structures are separated according to size and _______.

Correct AnswerverifiedShow Answer

Certain cells in your pancreas make digestive enzymes that are secreted into ducts and carried to your small intestine.If you looked at these pancreatic cells by electron microscopy,you would expect to see

Correct AnswerverifiedShow Answer

In a plant cell,the genes that code for all the proteins found in a chloroplast are located in the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The figure below shows structures found in a(n) _______.The structures labeled 1,2 and 3 represent _______,_______ and _______,in that order.

Correct AnswerverifiedA

The folds of the inner mitochondrial membrane

Correct AnswerverifiedShow Answer

Mitochondria and chloroplasts differ in that

Correct AnswerverifiedShow Answer

Which of the following represents is the correct arrangement of items in order of size,from smallest to largest?

Correct AnswerverifiedShow Answer

As a living cell grows larger,in what ways do its metabolic processes change?

Correct AnswerverifiedShow Answer

Ribosomes are the structures in which

Correct AnswerverifiedShow Answer

Which molecule will cross a cell membrane most easily?

Correct AnswerverifiedE

If the inner membrane of a mitochondrion were not folded to create cristae,

Correct AnswerverifiedShow Answer

All cellular membranes

Correct AnswerverifiedShow Answer

In mitochondria,the energy from "food" molecules (such as glucose) that is partially broken down in the cytosol is converted to

Correct AnswerverifiedShow Answer

Use the following to answer questions : Refer to the figure below. -The electron micrograph shows a portion of a cell.This cell could have come from

Correct AnswerverifiedD

If you wanted to stain the ribosomes in a cell,you could use a dye that stains

Correct AnswerverifiedShow Answer

If a cell needed to increase its surface area without changing its volume in order to carry out cellular processes more efficiently,it could do this most effectively

Correct AnswerverifiedShow Answer

What is the major distinction between a prokaryotic and a eukaryotic cell?

Correct AnswerverifiedShow Answer

Most cells are small because

Correct AnswerverifiedShow Answer

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The figure below shows structures found in a(n) ___.The structures labeled 1,2 and 3 represent _,_ and ___,in that order.

Correct Answer
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A

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E

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D

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