Which of These Statements Is Correct for the Rough Endoplasmic

question 221

Multiple Choice

Which of these statements is correct for the rough endoplasmic reticulum?

• A)It does not contain ribosomes.
• B)It synthesizes proteins for export from the cell or for use in construction of a new cellular membrane.
• C) It is abundant in cells that specialize in lipid metabolism.
• D) It is abundant in liver cells.

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Definitions:

Adhesion Junction

Junction between cells in which the adjacent plasma membranes do not touch but are held together by intercellular filaments attached to buttonlike thickenings.

Tight Junction

A complex of proteins in the cell membrane that creates a watertight seal between cells, preventing leakage of extracellular fluid.

Impermeable Barrier

A material or structure that does not allow fluids or gases to pass through it.

Epithelial

Refers to the type of tissue that lines the cavities and surfaces of blood vessels and organs throughout the body.