Q: What is a specialized internal cellular structure bound by one or more membranes?

A: Organelle

To understand what a specialized internal cellular structure bound by one or more membranes is, we can break down the question to identify key components.

First, we need to understand what a "cellular structure" is. A cellular structure refers to any specific part or component inside a cell.

Next, we need to understand what is meant by "bound by one or more membranes." In a cell, membranes act as boundaries, separating different compartments and regulating the flow of materials in and out. Essentially, a membrane-bound structure refers to a structure that is enclosed within a membrane.

Putting these two concepts together, a specialized internal cellular structure bound by one or more membranes is known as an "organelle." Organelles are distinct structures found within cells and are surrounded by a membrane. These organelles perform specific functions that contribute to the overall functioning and survival of the cell.

Examples of organelles include the mitochondria (responsible for energy production), the nucleus (containing the cell's genetic material), the endoplasmic reticulum (involved in protein synthesis), and the Golgi apparatus (responsible for protein modification and packaging).

In summary, organelles are specialized internal cellular structures surrounded by one or more membranes, and they serve specific functions within the cell.