AEMCA Practice Exam

Which of the following components is NOT part of the cell?

1. Nucleus

2. Cell membrane

3. Cartilage

4. Mitochondrion

The correct answer is: Cartilage

Cartilage is not a component of the cell; rather, it is a type of connective tissue found in multicellular organisms. Cartilage serves various functions in the body, such as providing support, cushioning joints, and facilitating movement. It is made up of specialized cells, known as chondrocytes, embedded in a matrix of collagen and elastic fibers. In contrast, the nucleus is a vital organelle within eukaryotic cells that contains genetic material and regulates cellular activity. The cell membrane forms the outer boundary of the cell, controlling the movement of substances in and out. Mitochondria, often referred to as the powerhouse of the cell, are responsible for energy production through cellular respiration. Each of these options contributes directly to the structural and functional aspects of cells, whereas cartilage is associated with tissues made up of cells, highlighting the distinction between cellular and tissue components.