Question 1

How do plasmodesmata form?

Accepted Answer

They form by incomplete separation of plant daughter cells after mitosis.

Question 2

The only glycosaminoglycan that occurs as a single long polysaccharide chain is _______.

Accepted Answer

hyaluronan

Question 3

The fibrous proteins of the extracellular matrix are embedded in polysaccharide gels formed of glycosaminoglycans.

Accepted Answer

A) True 
 B)False  True

Question 4

Tight junctions are located around the entire circumference of the cell.

Accepted Answer

A) True 
 B)False

Question 5

Why does any mutation in a gap junction protein produce defects in gap junction functions in sensitive tissues? Give two possible explanations.

Accepted Answer

The remaining connexins in sensitive tis

Question 6

Basal laminae are a meshwork of fibrils composed primarily of type _______ collagen.

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 7

What is the function of plectin?

Accepted Answer

It connects intermed

Question 8

Aggrecan is a large proteoglycan consisting of about 100 hyaluronan chains extending from a core protein.

Accepted Answer

A) True 
 B)False

Question 9

The polysaccharide chains of bacterial cell walls are made of alternating

Accepted Answer

A)  N-acetylgalactose and N-acetylmuramic acids. 
B)  N-acetylglucosamine and N-acetylmuramic acids. 
C)  N-acetylglucosamine and N-acetylneuraminic acids. 
D)  N-acetyl galactose and N-acetylneuraminic acids. 
A)  N-acetylgalactose and N-acetylmuramic acids. 
B)  N-acetylglucosamine and N-acetylmuramic acids. 
C)  N-acetylglucosamine and N-acetylneuraminic acids. 
D)  N-acetyl galactose and N-acetylneuraminic acids.

Question 10

Cellulose synthase in plants is located

Accepted Answer

A)  in the Golgi apparatus. 
B)  in the cytosol. 
C)  in the plasma membrane. 
D)  outside the cell. 
A)  in the Golgi apparatus. 
B)  in the cytosol. 
C)  in the plasma membrane. 
D)  outside the cell.

Question 11

All of the following can be due to a mutation in a gene for a gap junction protein except

Accepted Answer

A)  Charcot-Marie-Tooth disease. 
B)  deafness. 
C)  cataracts. 
D)  scurvy. 
A)  Charcot-Marie-Tooth disease. 
B)  deafness. 
C)  cataracts. 
D)  scurvy.

Question 12

The communicating junctions between plant cells are called

Accepted Answer

A)  gap junctions. 
B)  plasmodesmata. 
C)  plasmotubules. 
D)  lamellar junctions. 
A)  gap junctions. 
B)  plasmodesmata. 
C)  plasmotubules. 
D)  lamellar junctions.

Question 13

Adherens junctions and desmosomes both link to intermediate filaments in cells.

Accepted Answer

A) True 
 B)False

Question 14

Suppose that a research group is conducting experiments to test how penicillin kills bacteria. Their starting point is a recent finding that penicillin inhibits the enzyme cross-linked between different strands of the peptidoglycan that forms the principal component of the bacterial cell wall. Formulate a hypothesis based on an analogy between the bacterial and plant cell wall and on the concept of turgor pressure. Briefly state the hypothesis, and propose an experiment to test it.

Accepted Answer

In the absence of cross-linking due to p

Question 15

Cellulose, chitin, and hyaluronan are all deposited extracellularly by

Accepted Answer

A)  secretion. 
B)  exocytosis. 
C)  ABC transporters. 
D)  plasma membrane enzyme complexes. 
A)  secretion. 
B)  exocytosis. 
C)  ABC transporters. 
D)  plasma membrane enzyme complexes.

Question 16

The basic structural polysaccharide of fungal cell walls, crab shells, and insect exoskeletons is

Accepted Answer

A)  cellulose. 
B)  chitin. 
C)  collagen. 
D)  hemicellulose. 
A)  cellulose. 
B)  chitin. 
C)  collagen. 
D)  hemicellulose.

Question 17

Explain how plasmodesmata in plants allow for paracrine signaling (signaling between adjacent or neighboring cells).

Accepted Answer

Plasmodesmata physically link plant cell

Question 18

Connective tissue cells are connected to the extracellular matrix by receptors that bind to an adhesive protein called

Accepted Answer

A)  fibronectin. 
B)  aggrecan. 
C)  integrin. 
D)  lamin. 
A)  fibronectin. 
B)  aggrecan. 
C)  integrin. 
D)  lamin.

Question 19

Plant cell walls consist of cellulose fibrils in a matrix of

Accepted Answer

A)  chitin and pectin. 
B)  pectin and hemicellulose. 
C)  Pectin and lignin. 
D)  lignin and chitin. 
A)  chitin and pectin. 
B)  pectin and hemicellulose. 
C)  Pectin and lignin. 
D)  lignin and chitin.

Question 20

Homophilic interactions between cells involve interactions

Accepted Answer

A)  among adhesion molecules of the same molecular class. 
B)  among adhesion molecules of different molecular classes. 
C)  between integrins and ICAMs. 
D)  between cadherins and $\beta$-catenin. 
A)  among adhesion molecules of the same molecular class. 
B)  among adhesion molecules of different molecular classes. 
C)  between integrins and ICAMs. 
D)  between cadherins and $\beta$-catenin.

How do plasmodesmata form?

The only glycosaminoglycan that occurs as a single long polysaccharide chain is _______.

The fibrous proteins of the extracellular matrix are embedded in polysaccharide gels formed of glycosaminoglycans.

Tight junctions are located around the entire circumference of the cell.

Why does any mutation in a gap junction protein produce defects in gap junction functions in sensitive tissues? Give two possible explanations.

Basal laminae are a meshwork of fibrils composed primarily of type _______ collagen.

What is the function of plectin?

Aggrecan is a large proteoglycan consisting of about 100 hyaluronan chains extending from a core protein.

The polysaccharide chains of bacterial cell walls are made of alternating

Cellulose synthase in plants is located

All of the following can be due to a mutation in a gene for a gap junction protein except

The communicating junctions between plant cells are called

Adherens junctions and desmosomes both link to intermediate filaments in cells.

Cellulose, chitin, and hyaluronan are all deposited extracellularly by

The basic structural polysaccharide of fungal cell walls, crab shells, and insect exoskeletons is

Explain how plasmodesmata in plants allow for paracrine signaling (signaling between adjacent or neighboring cells).

Connective tissue cells are connected to the extracellular matrix by receptors that bind to an adhesive protein called

Plant cell walls consist of cellulose fibrils in a matrix of

Homophilic interactions between cells involve interactions

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

Filters

Exam 16: Cell Walls, the Extracellular Matrix, and Cell Interactions

How do plasmodesmata form?

The only glycosaminoglycan that occurs as a single long polysaccharide chain is _______.

The fibrous proteins of the extracellular matrix are embedded in polysaccharide gels formed of glycosaminoglycans.

Tight junctions are located around the entire circumference of the cell.

Why does any mutation in a gap junction protein produce defects in gap junction functions in sensitive tissues? Give two possible explanations.

Basal laminae are a meshwork of fibrils composed primarily of type _______ collagen.

What is the function of plectin?

Aggrecan is a large proteoglycan consisting of about 100 hyaluronan chains extending from a core protein.

The polysaccharide chains of bacterial cell walls are made of alternating

Cellulose synthase in plants is located

All of the following can be due to a mutation in a gene for a gap junction protein except

The communicating junctions between plant cells are called

Adherens junctions and desmosomes both link to intermediate filaments in cells.

Cellulose, chitin, and hyaluronan are all deposited extracellularly by

The basic structural polysaccharide of fungal cell walls, crab shells, and insect exoskeletons is

Explain how plasmodesmata in plants allow for paracrine signaling (signaling between adjacent or neighboring cells).

Connective tissue cells are connected to the extracellular matrix by receptors that bind to an adhesive protein called

Plant cell walls consist of cellulose fibrils in a matrix of

Homophilic interactions between cells involve interactions

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

Filters