Cell bio final (test 3)
Which of the following proteins mediate between the extracellular matrix and the cytosol?
All of the above
Which of the following statements about apoptosis is true?
Apoptosis is promoted by the release of cytochrome c into the cytosol from mitochondria
What are the three major components of the plants extracellular matrix (cell wall)?
Cellulose Hemicellulose Pectin
Which of the following is a protein of the extracellular matrix (multiple answers possible):
Elastin, Collagen, Laminin
True or False: Apoptosis is characterized by the swelling of cells.
False
True or false: During cell division the plant cell dissociates from its cell wall and is divided by a contractile ring made of microfilaments
False
Name the cells that produce large amounts of extracellular matrix in connective tissue?
Fibroblast
The function of which organ depends on Gap junctions?
Heart
Which two proteins connect the cytoskeleton with the extracellular matrix?
Integrin Fibronectin
Which protein connects cells to the basal lamina?
Laminin
The phorphorylation of the nuclear _______________________ is responsible for the dissociation of the nucleus during mitosis.
Lamins
Plant cell divide by through the formation of
Phragmoplast
Which structure connects neighboring plant cells with each other through shared plasma membrane and ER?
Plasmodesmata
What are the 3 major classes of proteins in the extracellular matrix in animal cells?
Structural proteins, Protein-polysaccharide complexes, Adhesive glycoproteins
True or False: Gap junction opening and closure can be regulated?
True
True or False: Hyaluronic acid is synthesized on the plasma membrane and not delivered to the extracellular matrix by vesicles
True
True or False: Survival factors inhibit apoptosis.
True
True or false: Cells during the G1 phase maintain their normal function.
True
Apoptosis differs from necrosis in that necrosis ________________.
causes cells to swell and burst, whereas apoptotic cells shrink and condense.
Which or those Cell-Cell connections is associated with which element of the cytoskeletion
desmosome, hemidesmosome adherens junction
Which intracellular structure organizes the orientation of the cellulose microfibrils?
microtubules
Progression through the cell cycle requires a cyclin to bind to a Cdk because _________.
the binding of a cyclin to Cdk is required for Cdk enzymatic activity
Which of the following statements is true? Please circle!
A desmotubulus connects two cells through a plasmodesmata. Adherens junctions are coupled to the microfilament system.