Question 1

The loss of cadherin function may be instrumental in what disease state?

Accepted Answer

A) colds 
B) the spread of benign tumors 
C) the spread of malignant tumors 
D) influenza 
E) AIDS 
A) colds 
B) the spread of benign tumors 
C) the spread of malignant tumors 
D) influenza 
E) AIDS

Question 2

Cell walls of young, undifferentiated plant cells grow along with the cells of which they are a part and thus exhibit extensibility. What are they known as?

Accepted Answer

A) primary walls 
B) secondary walls 
C) expandophiles 
D) complete walls 
E) incomplete walls 
A) primary walls 
B) secondary walls 
C) expandophiles 
D) complete walls 
E) incomplete walls

Question 3

You coat a Petri dish with fibronectin and proteoglycans and then culture cells on the dish. The cells adhere to the dish. You repeat the experiment but this time add RGD tripeptides to the culture dish as the cells are added. The result of this experiment is an example of what biochemical process?

Accepted Answer

A) competitive inhibition 
B) noncompetitive inhibition 
C) enzymatic activation 
D) feedback inhibition 
E) allosterism 
A) competitive inhibition 
B) noncompetitive inhibition 
C) enzymatic activation 
D) feedback inhibition 
E) allosterism

Question 4

How is the structure of the mature plant cell wall similar to the structure of the corneal stroma of the chicken embryo?

Accepted Answer

A) Both contain cellulose. 
B) Both contain adjacent layers of fibers that run parallel to each other. 
C) Both contain phospholipids. 
D) Both contain adjacent layers of fibers that are arranged perpendicular to each other. 
E) Both are composed of collagen. 
A) Both contain cellulose. 
B) Both contain adjacent layers of fibers that run parallel to each other. 
C) Both contain phospholipids. 
D) Both contain adjacent layers of fibers that are arranged perpendicular to each other. 
E) Both are composed of collagen.

Question 5

The dense central structure that is derived from the smooth endoplasmic reticulum and usually seen in the plasmodesmata is called a(n)________.

Accepted Answer

A) desmosome 
B) desmotubule 
C) hemidesmosome 
D) annulus 
E) desmoglein 
A) desmosome 
B) desmotubule 
C) hemidesmosome 
D) annulus 
E) desmoglein

Question 6

In which disease does an individual produce antibodies against proteins present in hemidesmosmes?

Accepted Answer

A) epidermolysis bullosa 
B) bullous pemphigoid 
C) hemidesmosomosis 
D) eczema 
A) epidermolysis bullosa 
B) bullous pemphigoid 
C) hemidesmosomosis 
D) eczema

Question 7

Which of the following proteins are known to be associated with focal adhesions? (Select all correct choices)

Accepted Answer

A) actin 
B) aconitase 
C) myosin 
D) malin 
A) actin 
B) aconitase 
C) myosin 
D) malin

Question 8

During gap junction formation, connexons in apposing cells become tightly connected through extensive noncovalent interactions of __________.

Accepted Answer

A) connexin subunit intracellular domains 
B) connexin subunit extracellular domains 
C) connexin carbohydrates 
D) connexin lipids 
E) polynucleotides 
A) connexin subunit intracellular domains 
B) connexin subunit extracellular domains 
C) connexin carbohydrates 
D) connexin lipids 
E) polynucleotides

Question 9

What class of plant cell proteins facilitates plant cell growth by causing a localized relaxation of the cell wall, which allows the cell to elongate at that site in response to turgor pressure generated within the cell?

Accepted Answer

A) extensins 
B) desmins 
C) expansins 
D) protein kinases 
E) phosphatases 
A) extensins 
B) desmins 
C) expansins 
D) protein kinases 
E) phosphatases

Question 10

If experimentally linked $\alpha$/$\beta$ heterodimer integrin subunits are separated, what happens?

Accepted Answer

A) The molecules bind their ligand tightly 
B) The molecules are unable to bind a ligand. 
C) The molecules are cleaved. 
D) The molecules denature their ligand. 
E) The molecules are denatured and degraded. 
A) The molecules bind their ligand tightly 
B) The molecules are unable to bind a ligand. 
C) The molecules are cleaved. 
D) The molecules denature their ligand. 
E) The molecules are denatured and degraded.

Question 11

The enzyme embedded in the plant cell membrane that catalyzes the growth of a cellulose molecule is called _________.

Accepted Answer

A) cellulase 
B) cellulose synthase 
C) Rubisco 
D) PEP carboxylase 
E) cellulose transferase 
A) cellulase 
B) cellulose synthase 
C) Rubisco 
D) PEP carboxylase 
E) cellulose transferase

Question 12

Filaments connected to the dense plaque underlying the membrane in a hemidesmosome course outward into the cytoplasm. These filaments are composed of the protein _____ and are best known as ______.

Accepted Answer

A) actin, microfilaments 
B) keratin, microfilaments 
C) actin, intermediate filaments 
D) keratin, intermediate filaments 
E) tubulin, intermediate filaments 
A) actin, microfilaments 
B) keratin, microfilaments 
C) actin, intermediate filaments 
D) keratin, intermediate filaments 
E) tubulin, intermediate filaments

Question 13

A new type of communication system has been discovered that consists of thin, highly elongated tubules capable of conducting cell-surface proteins, cytoplasmic vesicles and calcium signals from one cell to another. This system is referred to as ________.

Accepted Answer

A) T tubules 
B) scanning tunneling EMs 
C) tunneling nanotypes 
D) tunneling nanotubes 
E) sarcoplasmic tubules 
A) T tubules 
B) scanning tunneling EMs 
C) tunneling nanotypes 
D) tunneling nanotubes 
E) sarcoplasmic tubules

Question 14

What is thought to be the origin of immunoglobulins?

Accepted Answer

A) immune system molecules in invertebrates 
B) cell-adhesion receptors in invertebrates 
C) cell-adhesion receptors in fish 
D) cell-adhesion molecules in amphibians 
E) immune system molecules in reptiles 
A) immune system molecules in invertebrates 
B) cell-adhesion receptors in invertebrates 
C) cell-adhesion receptors in fish 
D) cell-adhesion molecules in amphibians 
E) immune system molecules in reptiles

Question 15

What determines the strength of adhesion between cells held together by cadherins?

Accepted Answer

A) the length of the cadherins connecting the cells 
B) the width of the cadherins connecting the cells 
C) the amount of tryptophan in the cadherins connecting the cells 
D) the number of cadherins in a cluster connecting the cells 
E) the number of tyrosine residues in the cadherins connecting the cells 
A) the length of the cadherins connecting the cells 
B) the width of the cadherins connecting the cells 
C) the amount of tryptophan in the cadherins connecting the cells 
D) the number of cadherins in a cluster connecting the cells 
E) the number of tyrosine residues in the cadherins connecting the cells

Question 16

Which tight junction will form a tighter seal?

Accepted Answer

A) one with a single strand of aligned integral membrane proteins 
B) one with a number of parallel, interconnected strands of aligned integral membrane proteins 
C) tight junctions containing a special kind of phospholipid 
D) tight junctions containing a special kind of carbohydrate 
E) one with a number of parallel, interconnected strands of interdigitated integral membrane proteins 
A) one with a single strand of aligned integral membrane proteins 
B) one with a number of parallel, interconnected strands of aligned integral membrane proteins 
C) tight junctions containing a special kind of phospholipid 
D) tight junctions containing a special kind of carbohydrate 
E) one with a number of parallel, interconnected strands of interdigitated integral membrane proteins

Question 17

Organoid uses currently include all of the following EXCEPT:

Accepted Answer

A) patient-individualized testing of efficacy of therapeutic drugs 
B) mass testing of efficacy of therapeutic drugs 
C) generation of organs for researching disease progression 
D) generation of organs to replace those found in the human body 
A) patient-individualized testing of efficacy of therapeutic drugs 
B) mass testing of efficacy of therapeutic drugs 
C) generation of organs for researching disease progression 
D) generation of organs to replace those found in the human body

Question 18

What kind of experiments have provided evidence that most integrins have unique functions?

Accepted Answer

A) enzyme assays 
B) gene addition experiments 
C) gene knockout experiments in mice 
D) freeze-fracture, freeze etch experiments 
E) sucrose density centrifugation 
A) enzyme assays 
B) gene addition experiments 
C) gene knockout experiments in mice 
D) freeze-fracture, freeze etch experiments 
E) sucrose density centrifugation

Question 19

What integral membrane protein family made of two membrane-spanning chains ($\alpha$ and $\beta$)is involved in attaching cells to their extracellular microenvironment?

Accepted Answer

A) laminins 
B) fibronectins 
C) integrins 
D) myosins 
E) lysins 
A) laminins 
B) fibronectins 
C) integrins 
D) myosins 
E) lysins

Question 20

Which of the following tissues is typically NOT derived from mesenchymal cells?

Accepted Answer

A) mesodermal tissues 
B) ectodermal tissues 
C) blood 
D) muscle 
E) bone 
A) mesodermal tissues 
B) ectodermal tissues 
C) blood 
D) muscle 
E) bone

The loss of cadherin function may be instrumental in what disease state?

Cell walls of young, undifferentiated plant cells grow along with the cells of which they are a part and thus exhibit extensibility. What are they known as?

You coat a Petri dish with fibronectin and proteoglycans and then culture cells on the dish. The cells adhere to the dish. You repeat the experiment but this time add RGD tripeptides to the culture dish as the cells are added. The result of this experiment is an example of what biochemical process?

How is the structure of the mature plant cell wall similar to the structure of the corneal stroma of the chicken embryo?

The dense central structure that is derived from the smooth endoplasmic reticulum and usually seen in the plasmodesmata is called a(n)________.

In which disease does an individual produce antibodies against proteins present in hemidesmosmes?

Which of the following proteins are known to be associated with focal adhesions? (Select all correct choices)

During gap junction formation, connexons in apposing cells become tightly connected through extensive noncovalent interactions of __________.

What class of plant cell proteins facilitates plant cell growth by causing a localized relaxation of the cell wall, which allows the cell to elongate at that site in response to turgor pressure generated within the cell?

If experimentally linked $\alpha$ / $\beta$ heterodimer integrin subunits are separated, what happens?

The enzyme embedded in the plant cell membrane that catalyzes the growth of a cellulose molecule is called _________.

Filaments connected to the dense plaque underlying the membrane in a hemidesmosome course outward into the cytoplasm. These filaments are composed of the protein _ and are best known as __.

A new type of communication system has been discovered that consists of thin, highly elongated tubules capable of conducting cell-surface proteins, cytoplasmic vesicles and calcium signals from one cell to another. This system is referred to as ________.

What is thought to be the origin of immunoglobulins?

What determines the strength of adhesion between cells held together by cadherins?

Which tight junction will form a tighter seal?

Organoid uses currently include all of the following EXCEPT:

What kind of experiments have provided evidence that most integrins have unique functions?

What integral membrane protein family made of two membrane-spanning chains ( $\alpha$ and $\beta$ )is involved in attaching cells to their extracellular microenvironment?

Which of the following tissues is typically NOT derived from mesenchymal cells?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 7: Interactions Between Cells and Their Environment

The loss of cadherin function may be instrumental in what disease state?

Cell walls of young, undifferentiated plant cells grow along with the cells of which they are a part and thus exhibit extensibility. What are they known as?

You coat a Petri dish with fibronectin and proteoglycans and then culture cells on the dish. The cells adhere to the dish. You repeat the experiment but this time add RGD tripeptides to the culture dish as the cells are added. The result of this experiment is an example of what biochemical process?

How is the structure of the mature plant cell wall similar to the structure of the corneal stroma of the chicken embryo?

The dense central structure that is derived from the smooth endoplasmic reticulum and usually seen in the plasmodesmata is called a(n)________.

In which disease does an individual produce antibodies against proteins present in hemidesmosmes?

Which of the following proteins are known to be associated with focal adhesions? (Select all correct choices)

During gap junction formation, connexons in apposing cells become tightly connected through extensive noncovalent interactions of __________.

What class of plant cell proteins facilitates plant cell growth by causing a localized relaxation of the cell wall, which allows the cell to elongate at that site in response to turgor pressure generated within the cell?

If experimentally linked α\alphaα / β\betaβ heterodimer integrin subunits are separated, what happens?

The enzyme embedded in the plant cell membrane that catalyzes the growth of a cellulose molecule is called _________.

Filaments connected to the dense plaque underlying the membrane in a hemidesmosome course outward into the cytoplasm. These filaments are composed of the protein _____ and are best known as ______.

A new type of communication system has been discovered that consists of thin, highly elongated tubules capable of conducting cell-surface proteins, cytoplasmic vesicles and calcium signals from one cell to another. This system is referred to as ________.

What is thought to be the origin of immunoglobulins?

What determines the strength of adhesion between cells held together by cadherins?

Which tight junction will form a tighter seal?

Organoid uses currently include all of the following EXCEPT:

What kind of experiments have provided evidence that most integrins have unique functions?

What integral membrane protein family made of two membrane-spanning chains ( α\alphaα and β\betaβ )is involved in attaching cells to their extracellular microenvironment?

Which of the following tissues is typically NOT derived from mesenchymal cells?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

If experimentally linked $\alpha$ / $\beta$ heterodimer integrin subunits are separated, what happens?

Filaments connected to the dense plaque underlying the membrane in a hemidesmosome course outward into the cytoplasm. These filaments are composed of the protein _ and are best known as __.

What integral membrane protein family made of two membrane-spanning chains ( $\alpha$ and $\beta$ )is involved in attaching cells to their extracellular microenvironment?