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Science
9th
grade
Cell Envelope and Osmosis | The Fundamental Unit of Life | Assessment | English | Grade 9
7 questions
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- 1. Multiple Choice
Cell envelope is made up of ____ and ____.
Cell wall and cytoplasm
Cell wall and cell organelles
Cell wall and nuclear membrane
Cell wall and plasma membrane
- 2. Multiple Choice
Which of the following is not true for plasma membrane?
It is the innermost layer of the animal cell
It allows entry or exit of some materials in and out of the cell
It is known as semi permeable membrane or selectively permeable membrane
All of these
- 3. Multiple Choice
What is diffusion?
Process in which solid, liquid or gaseous substances move from low concentration to high concentration
Process in which solid, liquid and gaseous substances move from higher concentration to lower concentration
Process in which only solid substances move from low concentration to high concentration
Process in which only liquid substances move from low concentration to high concentration.
- 4. Multiple Choice
Select the correct sentence with respect to osmosis.
The process in which oxygen molecules move from higher concentration to lower concentration through a semipermeable membrane.
The process in which carbon dioxide molecules move from higher concentration to lower concentration through a semipermeable membrane
The process in which water molecules move from higher water concentration to lower water concentration through a semipermeable membrane.
The process in which solute molecules move from lower concentration to higher concentration through a semipermeable membrane.
- 5. Multiple Choice
When a dried raisin is kept in water for some time, it
swells
shrinks
remains same
none of these
- 6. Multiple Choice
Ritu placed some raisins in the sugar solution. What will happen to raisins?
Raisins will swell
Raisins will shrink
Raisins will remain same
none of these
- 7. Multiple Choice
If the medium surrounding the cell has higher water concentration than the cell, then the solution is known as ____ solution.
hypotonic
isotonic
hypertonic
none of these
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