AIIMS 2010
- Exam
- AIIMS
- Year
- 2010
- Subject
- Botany
- Chapter
- Transport in Plants
AIIMS 2010 · Botany · Transport in Plants
Assertion : Shrinkage of the protoplast of a cell occurs under the...
Assertion : Shrinkage of the protoplast of a cell occurs under the influence of hypertonic solution.
Reason : Hypertonic solution causes plasmolysis.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion
Step-by-step solution
Shrinkage of the protoplast of a cell (due to water loss) under the influence of a hypertonic solution is called plasmolysis. Hypertonic solution causes exosmosis or withdrawal of water from cytoplasm and then the central vacuole of cell. The size of cytoplasm as well as central vacuole and hence protoplast becomes reduced. The pressure on the wall is simultaneously reduced and the elastic wall contracts causing a reduction in cell size.