AP Biologyeasymcq1 pt

Which structure forms a network of protein filaments that gives cells mechanical support, anchors organelles, and provides tracks for intracellular transport?

A.The cytoskeleton
B.The extracellular matrix
C.The nuclear envelope
D.The smooth endoplasmic reticulum

Explanation

Core Concept

The cytoskeleton is a meshwork of microtubules, microfilaments, and intermediate filaments spanning the cytoplasm. These filaments bear compressive and tensile forces, so they hold cell shape, anchor organelles in place, and serve as tracks for motor proteins that drag vesicles between compartments during growth and division.

Correct Answer

AThe cytoskeleton

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