Question 1

Surface-area-to-volume ratios indicate

Accepted Answer

A)  cells must exceed a certain minimum size.
B)  as cells get larger,their surface area actually decreases.
C)  that the largest cells have a less proportionate need for food intake and waste removal.
D)  a chicken egg is one cell thus demonstrating the upper limit for metabolizing cell size.
E)  as cells get larger,their surface area gets larger but at a slower rate than the volume increases.F) A) and B)
G) B) and E)

Question 2

Which type of cells will have modifications that increase the surface-area-to-volume ratio?

Accepted Answer

A)  cells that specialize in absorption
B)  cells that specialize in gas exchange
C)  cells that secrete proteins
D)  cells that secrete lipids
E)  cells that form a waterproof barrierF) C) and E)
G) None of the above

Question 3

Which of the following events would increase the cell's ability to exchange materials across the membrane?

Accepted Answer

A)  multiple cellular divisions that restore the amount of surface area
B)  the growth of microvilli on the cell membrane
C)  specialization in absorption
D)  All of the answer choices would increase the cell's ability to exchange materials across the membrane.
E)  None of the answer choices would increase the cell's ability to exchange materials across the membrane.F) None of the above
G) A) and B)

Question 4

Which organelle has 13 rows of tubulin dimers around an empty central core?

Accepted Answer

A)  flagella
B)  microtubules
C)  actin filaments
D)  intermediate filaments
E)  ciliaF) A) and E)
G) C) and D)

Question 5

Which of the following is a prokaryotic cell?

Accepted Answer

A)  plant cell
B)  liver cell
C)  muscle cell
D)  paramecium
E)  bacteriumF) C) and E)
G) A) and E)

Question 6

Since all organisms carry on cellular respiration,all living cells must contain mitochondria.

Accepted Answer

A) True 
 B)False

Question 7

Ribosomes are composed of

Accepted Answer

A)  DNA and RNA.
B)  DNA and protein.
C)  only protein.
D)  RNA and protein.
E)  only DNA.F) B) and D)
G) C) and D)

Question 8

The motor molecules associated with actin filaments are called

Accepted Answer

A)  centrosomes.
B)  centrioles.
C)  dynein.
D)  myosin.
E)  kinesin.F) B) and E)
G) None of the above

Question 9

Since plant cells do not have centrioles,they are not required for all organisms to conduct mitosis and meiosis.

Accepted Answer

A) True 
 B)False

Question 10

Explain how the nuclear envelope of eukaryotic cells could have arisen.

Accepted Answer

The cell membrane of a prokaryotic cell ...

Question 11

Compared with a eukaryotic cell,a prokaryotic cell

Accepted Answer

A)  lacks organelles beyond ribosomes.
B)  is larger.
C)  does not require energy.
D)  is not living.
E)  has no method of movement.F) A) and D)
G) B) and E)

Question 12

Which of the following would not be a function of the peroxisomes?

Accepted Answer

A)  break down fats in the liver
B)  produce bile salts in the liver
C)  help germinating seeds convert fatty acids into molecules that can be converted to sugars
D)  store toxic materials in the cell
E)  metabolism that uses oxygen and releases carbon dioxide in leavesF) B) and D)
G) A) and B)

Question 13

Which is NOT a function of the cytoskeleton?

Accepted Answer

A)  maintains a cell's shape
B)  anchors organelles in place within a cell
C)  allows cell and its organelles to move
D)  secretes the calcium for bone tissue
E)  allows the formation of pseudopodiaF) A) and D)
G) A) and C)

Question 14

What evidence would not suggest that the fluid in the nucleus is different from the cytoplasm?

Accepted Answer

A)  There is a pH difference between the two fluids.
B)  The nuclear membrane encloses the nucleoplasm.
C)  Nuclear pores only permit passage of certain molecules into and out of the nucleus.
D)  Cytoplasm and nucleoplasm both flow freely into and out of the nucleus.
E)  Electron microscopy reveals nonmembranous components associated with the nuclear pores.F) A) and B)
G) A) and C)

Question 15

Mitochondria are bounded by a double membrane.The inner-filled space is called the matrix,which contains ______________ that break down carbohydrate products,releasing _______________ to be used for ATP production.

Accepted Answer

A)  DNA/energy
B)  ribosomes/carbon dioxide
C)  RNA/energy
D)  enzymes/energyE) A) and D)
F) B) and D)

Question 16

Which of these is mismatched?

Accepted Answer

A)  cilia-microtubules
B)  centrioles-spindle
C)  mitochondria-stroma
D)  lysosomes-hydrolytic enzymes
E)  ribosomes-RNAF) A) and B)
G) A) and C)

Question 17

The ____ will store pigments and toxins in plant cells.

Accepted Answer

A)  chloroplast
B)  lysosomes
C)  peroxisomes
D)  vacuole
E)  mitochondriaF) None of the above
G) D) and E)

Question 18

According to the endosymbiotic theory,eukaryotes became the mitochondria and chloroplasts found in prokaryotic cells.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following cells were most likely the first type of cells on Earth?

Accepted Answer

A)  bacteria
B)  fungi
C)  archaea
D)  plants
E)  animalsF) None of the above
G) A) and B)

Question 20

Circulating red blood cells in your body do not contain a nucleus and other organelles.Are these cells living?

Accepted Answer

A)  Yes,because they are actively metabolizing and once contained organelles.
B)  Yes,because they are capable of moving throughout the body in the circulation.
C)  No,because they do not contain a nucleus,they cannot be living.
D)  No,because red blood cells do not actively metabolize.
E)  No,because they are now only part of a once living cell.F) A) and E)
G) A) and D)

Exam 3: Cell Structure and Function

The ____ will store pigments and toxins in plant cells.

Correct AnswerverifiedShow Answer

The motor molecules associated with actin filaments are called

Correct AnswerverifiedShow Answer

Which is NOT a function of the cytoskeleton?

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Since all organisms carry on cellular respiration,all living cells must contain mitochondria.

Correct AnswerverifiedShow Answer

Which of the following cells were most likely the first type of cells on Earth?

Correct AnswerverifiedShow Answer

Which of these is mismatched?

Correct AnswerverifiedShow Answer

Circulating red blood cells in your body do not contain a nucleus and other organelles.Are these cells living?

Correct AnswerverifiedShow Answer

Since plant cells do not have centrioles,they are not required for all organisms to conduct mitosis and meiosis.

Correct AnswerverifiedShow Answer

Which of the following is a prokaryotic cell?

Correct AnswerverifiedShow Answer

According to the endosymbiotic theory,eukaryotes became the mitochondria and chloroplasts found in prokaryotic cells.

Correct AnswerverifiedShow Answer

Surface-area-to-volume ratios indicate

Correct AnswerverifiedShow Answer

What evidence would not suggest that the fluid in the nucleus is different from the cytoplasm?

Correct AnswerverifiedShow Answer

Which type of cells will have modifications that increase the surface-area-to-volume ratio?

Correct AnswerverifiedShow Answer

Mitochondria are bounded by a double membrane.The inner-filled space is called the matrix,which contains ______________ that break down carbohydrate products,releasing _______________ to be used for ATP production.

Correct AnswerverifiedShow Answer

Which of the following would not be a function of the peroxisomes?

Correct AnswerverifiedShow Answer

Which organelle has 13 rows of tubulin dimers around an empty central core?

Correct AnswerverifiedShow Answer

Which of the following events would increase the cell's ability to exchange materials across the membrane?

Correct AnswerverifiedShow Answer

Ribosomes are composed of

Correct AnswerverifiedShow Answer

Explain how the nuclear envelope of eukaryotic cells could have arisen.

Correct AnswerverifiedThe cell membrane of a prokaryotic cell ...View AnswerShow Answer

Compared with a eukaryotic cell,a prokaryotic cell

Correct AnswerverifiedShow Answer

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Mitochondria are bounded by a double membrane.The inner-filled space is called the matrix,which contains that break down carbohydrate products,releasing _ to be used for ATP production.

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The cell membrane of a prokaryotic cell ...
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