What is an organelle?

• A. A specialized structure inside a cell that performs a function
• B. A group of tissues
• C. A type of cell wall
• D. A molecule

Answer: (A)

An organelle is a specialized structure inside a cell that performs a specific function. Think of the cell as a factory, with organelles as the tiny machines that carry out distinct jobs to keep the cell alive and working. Examples include mitochondria that produce energy, ribosomes that make proteins, and the nucleus that stores DNA and directs activities. These internal structures work together to carry out the cell’s life processes.

A group of tissues is a higher level of organization, not something inside a cell. A cell wall is a surrounding layer found in some cells, not an internal organelle. A molecule is a chemical unit, far too small to be an organelle.