Cell Biology MCQs

Microtubules are hollow, cylindrical structures composed of tubulin protein. They are responsible for cell motility, movement of chromosomes during cell division, and forming fibers like cilia and flagella.

The centrosome is a structure in animal cells that functions as the microtubule organizing center. It is responsible for the formation of the spindle apparatus during cell division.

Sperm cells are the only human cells with flagella, which are long, whip-like structures that propel the cell.

Peroxisomes are small organelles containing enzymes that break down hydrogen peroxide, a toxic byproduct of cellular metabolism.

The spindle apparatus, composed of microtubules, pulls sister chromatids apart during cell division, ensuring that each new cell receives a complete set of chromosomes.

Actin filaments are thin, flexible filaments made of actin protein. They play important roles in cell shape, muscle contraction, and cell movement.

Centrioles are cylindrical structures composed of nine triplets of microtubules. They are involved in the formation of the spindle apparatus and cilia/flagella.

Cilia are short, hair-like structures that move fluids across the surface of cells. They are found in the respiratory tract, where they move mucus and other substances.

The rough endoplasmic reticulum (RER) has ribosomes attached to its surface and is involved in the synthesis and modification of proteins.

Intermediate filaments provide mechanical strength and stability to cells. They are made of various proteins and can resist tension.