The contents of cells are often visualized with fluorescent (glow-in-the-dark)stains.You treat a cell with a stain that makes a certain part of the cytoskeleton glow green and another stain that makes mitochondria glow red.Under the microscope,you see a meshwork of green filaments throughout the cell.Red organelles appear to be traveling along the filaments.The green stain you used must stain
A) microtubules.
B) microfilaments.
C) intermediate filaments.
D) motor proteins.

Question

Quizplus · Accepted Answer

The meshwork of green filaments throughout the cell suggest that they are part of the cytoskeleton. Microtubules are the largest of the three cytoskeleton filaments and are responsible for maintaining cell shape and supporting cell movement. Additionally, motor proteins use microtubules as tracks for transporting organelles and other cargo throughout the cell. Therefore, the green stain used must be staining microtubules.

The Contents of Cells Are Often Visualized with Fluorescent (Glow-In-The-Dark)stains