Q. Regarding the structural differences between plant and animal cells, consider the following statements:
1.Plant cells possess a rigid cell wall composed of plasma, which is absent in animal cells.
2.Both plant and animal cells possess a plasma membrane that regulates the entry and exit of substances.
3.Mature plant cells typically contain a single, large central vacuole, whereas animal cells contain multiple smaller vacuoles.
Which of the statements given above are correct?
Answer: B
Notes:
Explanation:
Statement 1 is incorrect: Plant cells possess a rigid cell wall composed of cellulose, which is absent in animal cells.
Statement 2&3 are correct:
- Plasma Membrane (Both): Acts as a selectively permeable barrier, controlling which substances (nutrients, waste) enter or exit both plant and animal cells.
- Vacuole Difference (Plant vs. Animal): Plant cells use one large central vacuole for storage and turgor pressure (rigidity), while animal cells typically contain smaller, temporary vacuoles for storage and transport.
