2) Polarized cells are characterized by A) random orientation within a tissue. B

Question

2) Polarized cells are characterized by
A) random orientation within a tissue.
B) a polar flagellum.
C) random orientation within an organ.
D) distinct apical and basolateral sides.
E) both choices B and D

4) In animal cells, the extracellular matrix plays important roles in all of the following processes except
A) cell division.
B) motility.
C) DNA replication.
D) differentiation.
E) adhesion.

6) Which of the following statements is true regarding cell-cell adhesion?
A) Adhesion is coordinated with many cellular processes except cell survival.
B) Adhesion molecules include plakoglobulin, which cements two cells together.
C) Adherens junctions are exclusive to plant cells.
D) Adhesive junctions are characterized by the attachment of long molecules of hyaluronate.
E) Adhesive junctions are dynamic in response to cellular signals.

8) Which of the following is mismatched?
A) IgSF[emdash]chondroitin
B) cadherins?calcium ions
C) selectins?leukocytes
D) cadherins?embryonic development
E) lectins?carbohydrates

10) Which of the following activities is not associated with cadherins?
A) segregation of cells to specific tissues
B) paracellular transport
C) embryonic development
D) establishment of synaptic connections
E) loss of activity associated with cancer

12) Which of the following is the correct order for the synthesis of the plant cell wall, from the outermost layer to the innermost layer?
A) middle lamella; primary cell wall; secondary cell wall; plasma membrane
B) primary cell wall; middle lamella; secondary cell wall; plasma membrane
C) plasma membrane; secondary cell wall; primary cell wall; middle lamella
D) middle lamella; secondary cell wall; primary cell wall; middle lamella
E) primary cell wall; secondary cell wall; plasma membrane; middle lamella


14) The function of integrin-linked kinase during integrin-based signaling is
A) integrin activation.
B) anchorage-dependent growth.
C) scaffolding protein.
D) cell movement.
E) anchorage-independent growth.


16) A person with neither anti-A nor anti-B antibodies in circulation has which of blood type?
A) A
B) B
C) AB
D) O


18) Which of the following is correctly paired with regard to similarity in function?
A) adhesive junctions-tight junctions
B) desmotubule-gap junction
C) tight junctions-gap junctions
D) plaques-plasmodesmata
E) connexons-desmosomes


20) You are investigating a clinical disorder in one of your patients. You discover that the patient has an autoimmune disease that targets and destroys fibroblasts. This disorder would most likely affect
A) fiber production by the cells, as occurs with blood clotting.
B) annulus formation.
C) hyluronate production in the joints.
D) collagen production.
E) all of the above

22) The protein invasin is associated with
A) Yersinia psuedotuberculosis.
B) the construction of an integrin network in bacteria.
C) plasmodemata.
D) tight-junction ridge formation.
E) lubrication of joints.


24) Which of the following is mismatched with regard to similar excellular structures in plant and animal cells?
A) elastins-extensins
B) extracellular matrix-cell wall
C) collagens-cellulose
D) proteoglycans-hemicelluloses
E) fibronectins-pectins


26) Which of the following is not associated with the basal lamina?
A) serves as a structural support
B) allows for movement of some small molecules
C) can influence cell migrations in certain areas of the body
D) contains collagen type IV, proteoglycans, laminins, and entactin
E) contains the most abundant supply of fibronectins.


28) In performing research, you treat frog zygotes with antibodies that bind E-cadherin. As a result, you expect
A) the cells to become exclusively muscle tissue.
B) the cells to be loosely associated and abort development.
C) the cells to be loosely associated and develop into a novel strain of frog.
D) the cells to divide uncontrollably.
E) no change with regard to development.

30) Focal contact is associated with which of the following type of cellular junction?
A) adhesive junction
B) gap junction
C) plasmodesmata
D) tight junctions
E) all of the above


32) A type of adhesive junction that is associated with the connection between an epithelial cell and the basal lamella is the
A) hemidesmosome.
B) desmosome.
C) gap junction.
D) plasmodesmata.
E) focal contact.


34) In the extracellular matrix of animal cells, collagen and elastin fibers are embedded with this matrix.
A) glycoaminoglycans
B) proteoglycans
C) pectins
D) lignins
E) both choices A and B

36) The organ where you would most likely expect to find actin microfilaments continuous with adherens junctions is the
A) liver.
B) stomach.
C) kidney.
D) brain.
E) heart.


38) The primary polysaccharides associated with the plant cell wall are the
A) hemicelluloses.
B) extensins.
C) fibronectins.
D) pectins.
E) both choices A and D


40) The autoimmune response to desmosomes or desmosomal components (not hemidesmosomes) leads to a blistering skin disease known as
A) pemphigus.
B) Ehlers?Danos syndrome.
C) syndecan.
D) junctional epidermolysis bullosa.
E) listeriosis.

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