Question 1

Which is a molecule found in plant extracellular matrices but not in animal cell extracellular matrices?

Accepted Answer

A)   Collagen
B)   Cellulose
C)   Proteoglycans
D)   Keratin
E)   PolysaccharidesF) None of the above
G) A) and C)

Question 2

A(n)  _______ cell always lacks a cell wall.

Accepted Answer

A)   bacterial
B)   plant
C)   animal
D)   fungal
E)   prokaryoticF) A) and E)
G) B) and E)

Question 3

You examine an unknown organism using freeze-fracture electron microscopy and discover ribosomes in its cytoplasm.You also find that it has inner membranes, but it is difficult to tell whether they are contiguous with the cell membrane or not.Finding which of the following would allow you to classify this organism as a prokaryote?

Accepted Answer

A)   DNA
B)   A distinct mitochondrion
C)   A capsule
D)   Plastids
E)   A nucleusF) B) and E)
G) A) and D)

Question 4

Which is a difference between a prokaryotic and a eukaryotic cell?

Accepted Answer

A)   The DNA in a prokaryotic cell is not enclosed in a membrane-bound nucleus.
B)   A prokaryotic cell does not use DNA as its genetic material.
C)   Cellular processes in a prokaryotic cell are compartmentalized, whereas compartmentalization is absent in a eukaryotic cell.
D)   A prokaryotic cell does not use ribosomes for protein synthesis, whereas a eukaryotic cell does.
E)   A prokaryotic cell is not enclosed by a cell membrane, and a eukaryotic cell is enclosed.F) A) and B)
G) B) and E)

Question 5

Refer to the figure below.  Which numbers represent cytoplasm, pili, ribosome, and cell wall, in that order?

Accepted Answer

A)   2, 8, 6, 4
B)   5, 2, 6, 3
C)   5, 6, 1, 4
D)   7, 2, 6, 3
E)   7, 6, 5, 3F) C) and D)
G) A) and C)

Question 6

The microvilli of intestinal cells

Accepted Answer

A)   increase the ability of the intestine to move nutrients through the intestinal tract.
B)   slow down the movement of nutrients through the intestinal tract.
C)   increase the surface area of the cells to allow increased uptake of nutrients from the intestinal tract.
D)   decrease the surface area of the cells relative to their volume to prevent loss of nutrients back into the intestinal tract.
E)   increase the movement of nutrients once they are inside cells and into the bloodstream.F) A) and C)
G) B) and C)

Question 7

The membrane surrounding each organelle

Accepted Answer

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

Question 8

Refer to the sketch below showing the internal structures of a prokaryotic cell.  How would you label, in the correct sequence, the structures that you would encounter if you started at one exterior position of this cell and traveled straight through to its center?

Accepted Answer

A)   Cell wall, capsule, cell membrane, nucleoid, cytoplasm, ribosome
B)   Cell membrane, cell wall, capsule, cytoplasm, nucleoid, ribosome
C)   Capsule, cell wall, cell membrane, cytoplasm, ribosome, nucleoid
D)   Cell wall, capsule, cell membrane, ribosome, cytoplasm, nucleoid
E)   Cell membrane, cytoplasm, cell wall, nucleoid, ribosome, capsuleF) A) and D)
G) A) and E)

Exam 5: Cells: the Working Units of Life

Correct Answer
verified

The microvilli of intestinal cells

Correct Answer
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Which is a difference between a prokaryotic and a eukaryotic cell?

Correct Answer
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A(n) _______ cell always lacks a cell wall.

Correct Answer
verified

Which is a molecule found in plant extracellular matrices but not in animal cell extracellular matrices?

Correct Answer
verified

Refer to the figure below. Which numbers represent cytoplasm, pili, ribosome, and cell wall, in that order?

Correct Answer
verified

Refer to the sketch below showing the internal structures of a prokaryotic cell. How would you label, in the correct sequence, the structures that you would encounter if you started at one exterior position of this cell and traveled straight through to its center?

Correct Answer
verified

The membrane surrounding each organelle

Correct Answer
verified

Exam 5: Cells: the Working Units of Life

Correct AnswerverifiedShow Answer

The microvilli of intestinal cells

Correct AnswerverifiedShow Answer

Which is a difference between a prokaryotic and a eukaryotic cell?

Correct AnswerverifiedShow Answer

A(n) _______ cell always lacks a cell wall.

Correct AnswerverifiedShow Answer

Which is a molecule found in plant extracellular matrices but not in animal cell extracellular matrices?

Correct AnswerverifiedShow Answer

Refer to the figure below. Which numbers represent cytoplasm, pili, ribosome, and cell wall, in that order?

Correct AnswerverifiedShow Answer

Refer to the sketch below showing the internal structures of a prokaryotic cell. How would you label, in the correct sequence, the structures that you would encounter if you started at one exterior position of this cell and traveled straight through to its center?

Correct AnswerverifiedShow Answer

The membrane surrounding each organelle

Correct AnswerverifiedShow Answer

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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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