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.