Question 1

Which of the cell adhesion molecules is critical to transducing changes in the ECM to a change in the cell?

Accepted Answer

A)   connexins
B)   cadherins
C)   integrins
D)   fibronectins
E)   claudinsF) A) and D)
G) A) and C)

Question 2

What structure cements plant cells together?

Accepted Answer

A)   middle lamella
B)   hemidesmosomes
C)   plasmodesmata
D)   primary cell walls
E)   adherens junctionsF) C) and D)
G) A) and D)

Question 3

Which of the following ECM molecules is probably the most abundant organic molecule on Earth?

Accepted Answer

A)   proteoglycans
B)   collagen
C)   chitin
D)   cellulose
E)   lamininsF) None of the above
G) A) and E)

Question 4

Gap junctions are to animal cells as ________ are to plant cells?

Accepted Answer

A)   middle lamella
B)   hemidesmosomes
C)   plasmodesmata
D)   primary cell walls
E)   tight junctionsF) A) and C)
G) None of the above

Question 5

The most prominent tissue type present in plants is the dermis.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is most TRUE about multicellular organisms when compared with unicellular organisms?

Accepted Answer

A)   Multicellular organisms carry out specialized functions, while unicellular organisms do not.
B)   Multicellular organisms can reproduce themselves, while unicellular organisms cannot.
C)   Multicellular organisms can digest more complex molecules than unicellular organisms.
D)   Multicellular organisms tend to have larger genomes than unicellular organisms.
E)   Multicellular organisms show development while unicellular organisms do not.F) A) and E)
G) A) and D)

Question 7

All of the following statements about cellulose are true EXCEPT:

Accepted Answer

A)   Cellulose is composed of fibers of carbohydrates.
B)   Cellulose is an important source of plant fiber for our diet.
C)   Cellulose is the primary molecule found in wood.
D)   Cellulose is one of the most abundant organic molecules on Earth.
E)   Certain animals like ourselves can easily digest cellulose and use it as a source of energy.F) C) and E)
G) B) and D) A

Question 8

Which of the following is NOT a function of cellular junctions?

Accepted Answer

A)   Cellular junctions hold adjacent cells together.
B)   Cellular junctions prevent leakage of materials between cell layers.
C)   Cellular junctions permit the direct exchange of small molecules between cytosol of adjacent cells.
D)   Cellular junctions bond cells to their ECM.
E)   Cellular junctions promote the motility of adjacent cells.F) B) and D)
G) A) and B)

Question 9

Which of the following statements about collagen is INCORRECT?

Accepted Answer

A)   There can be numerous types of collagen in multicellular organisms
B)   It is produced from polymers of amino acids.
C)   It tends to promote the "sticky" characteristics of the ECM.
D)   Its breakdown is a contributing characteristic of wrinkling during aging.
E)   It is a major component of the ECM for cartilage and bone.F) B) and E)
G) D) and E)

Question 10

The heart is a(n)  ________ composed mainly of ________ tissue?

Accepted Answer

A)   tissue, cardiac
B)   organ, muscle
C)   tissue, connective
D)   organ, connective
E)   organ, epithelialF) B) and E)
G) A) and D)

Question 11

Which of the following junctions are important for cell signaling?

Accepted Answer

A)   adherins junctions
B)   gap junctions
C)   plasmodesmata
D)   desmosomes
E)   All of the choices are correct.F) A) and E)
G) None of the above

Question 12

Wrinkling observed with aging is do to low production of the extracellular matrix molecule, fibronectin.

Accepted Answer

A) True 
 B)False

Question 13

All of the following represent anchoring junctions EXCEPT

Accepted Answer

A)   tight junctions.
B)   focal adhesions.
C)   hemidesmosomes.
D)   desmosomes.
E)   adherens junctions.F) A) and B)
G) A) and E)

Question 14

Which type of tissue constitutes most of the wood of a tree trunk?

Accepted Answer

A)   dermal tissue
B)   parenchyma tissue
C)   collenchyma tissue
D)   sclerenchyma tissue
E)   vascular tissueF) A) and D)
G) B) and D)

Question 15

Which of the following is NOT a component of focal adhesions?

Accepted Answer

A)   cadherins
B)   integrins
C)   actin filaments
D)   linker protein
E)   fibronectin/collagenF) A) and B)
G) C) and D)

Question 16

The major macromolecules of the ECM are polysaccharides and

Accepted Answer

A)   lipids.
B)   fat.
C)   proteins.
D)   nucleotides.
E)   amino acids.F) A) and B)
G) A) and C)

Question 17

Which of the following ECM molecules provides tensile strength?

Accepted Answer

A)   fibronectin
B)   collagen
C)   laminin
D)   elastin
E)   proteoglycanF) B) and C)
G) A) and D)

Question 18

Which of the following is NOT a function of the extracellular matrix?

Accepted Answer

A)   provides strength
B)   provides structural support
C)   provides organization of cells throughout the organism
D)   provides an important source of energy for the organism
E)   cell signalingF) B) and E)
G) A) and E)

Question 19

The epithelial tissue of animal cells is most similar to the ________ of plant cells?

Accepted Answer

A)   xylem
B)   vascular
C)   dermal
D)   ground
E)   phloemF) A) and E)
G) A) and B) C

Question 20

This forms a seal that prevents the movement of substances between cells, for instance from the intestinal lumen into the blood.

Accepted Answer

A)   gap junctions
B)   tight junctions
C)   desmosomes
D)   hemidesmosomes
E)   focal adhesionsF) A) and C)
G) B) and D) B

Exam 10: Multicellularity

Which of the cell adhesion molecules is critical to transducing changes in the ECM to a change in the cell?

Correct AnswerverifiedShow Answer

What structure cements plant cells together?

Correct AnswerverifiedShow Answer

Which of the following ECM molecules is probably the most abundant organic molecule on Earth?

Correct AnswerverifiedShow Answer

Gap junctions are to animal cells as ________ are to plant cells?

Correct AnswerverifiedShow Answer

The most prominent tissue type present in plants is the dermis.

Correct AnswerverifiedShow Answer

Which of the following is most TRUE about multicellular organisms when compared with unicellular organisms?

Correct AnswerverifiedShow Answer

All of the following statements about cellulose are true EXCEPT:

Correct AnswerverifiedA

Which of the following is NOT a function of cellular junctions?

Correct AnswerverifiedShow Answer

Which of the following statements about collagen is INCORRECT?

Correct AnswerverifiedShow Answer

The heart is a(n) ________ composed mainly of ________ tissue?

Correct AnswerverifiedShow Answer

Which of the following junctions are important for cell signaling?

Correct AnswerverifiedShow Answer

Wrinkling observed with aging is do to low production of the extracellular matrix molecule, fibronectin.

Correct AnswerverifiedShow Answer

All of the following represent anchoring junctions EXCEPT

Correct AnswerverifiedShow Answer

Which type of tissue constitutes most of the wood of a tree trunk?

Correct AnswerverifiedShow Answer

Which of the following is NOT a component of focal adhesions?

Correct AnswerverifiedShow Answer

The major macromolecules of the ECM are polysaccharides and

Correct AnswerverifiedShow Answer

Which of the following ECM molecules provides tensile strength?

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of the extracellular matrix?

Correct AnswerverifiedShow Answer

The epithelial tissue of animal cells is most similar to the ________ of plant cells?

Correct AnswerverifiedC

This forms a seal that prevents the movement of substances between cells, for instance from the intestinal lumen into the blood.

Correct AnswerverifiedB

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A

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The heart is a(n) composed mainly of tissue?

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C

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B