Which one of the following cell organelles is absent in animal cell?

Animal cells are distinguished from plant cells by the absence of a rigid cell wall. While both cell types possess a cell membrane (plasma membrane) that encloses the cytoplasm and nucleus [1], only plant cells have an additional outer layer called the cell wall. This structure, primarily composed of cellulose, provides tensile strength, protection, and structural support, allowing plants to maintain turgor pressure [2]. In contrast, animal cells only have a flexible cell membrane, which allows them to change shape and move [2]. Other organelles mentioned, such as the endoplasmic reticulum, mitochondria, and ribosomes, are common to both animal and plant cells as they perform essential metabolic and energy-producing functions [2]. Therefore, the cell wall is the organelle absent in animal cells [2].

Sources

1. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 2: The Invisible Living World: Beyond Our Naked Eye > 2.5 Why Is Cell Considered to Be a Basic Unit of Life? > p. 24
2. [2] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 2: The Invisible Living World: Beyond Our Naked Eye > Activity 2.3: Let us investigate > p. 12