OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

Which of the following best describes the cytoplasm?

1. Solid and rigid

2. Gel-like substance

3. Liquid and gaseous

4. Highly viscous

The correct answer is: Gel-like substance

The cytoplasm is best described as a gel-like substance because it provides a medium in which various cellular components, such as organelles and molecules, can be suspended and interact. This gel-like consistency allows for the movement of materials within the cell, facilitating various biochemical reactions essential for cell function. In contrast, while there are solid components within the cytoplasm, it is not solid and rigid, as that would impede cellular processes. The description of the cytoplasm as liquid and gaseous is inaccurate because it does not exist in a gaseous state under normal cellular conditions. Similarly, describing it as highly viscous does not capture the typical gel-like nature that balances fluidity and structural stability, which is crucial for maintaining cellular organization and function.