MCQ’S ON DIFFUSION
1. Phenomena through which water is absorbed by solids such as colloids leading them to increase in volume is
(a) diffusion
(b) imbibition
(c) facilitated diffusion
(d) osmosis
Answer: (b)
2. In older dying leaves to younger leaves, the mineral ions are assimilated into
(a) deposition of organic and inorganic compounds
(b) organic compound
(c) inorganic compounds
(d) none of these
Answer: (b)
3. Passage of water across a selectively permeable membrane is
(a) osmosis
(b) active transport
(c) facilitated diffusion
(d) pinocytosis
Answer: (a)
4. Wall pressure will______________ with rise in turgidity
(a) increase
(b) decrease
(c) remain unaffected
(d) fluctuate
Answer: (a)
5. Most effective light for stomatal opening is
(a) Red
(b) Blue
(c) Green
(d) Yellow
Answer: (b)
6. Diffusion of water through selectively permeable membrane is
(a) osmosis
(b) imbibition
(c) translocation
(d) diffusion
Answer: (a)
7. Water is forcefully pushed beyond endodermis of the root through the process of
(a) diffusion
(b) transmembrane transport
(c) symplast pathway
(d) apoplast pathway
Answer: (b)
8. Transpiration is a phenomenon pertaining to
(a) Activated transport
(b) Diffusion
(c) Osmosis
(d) Facilitated diffusion
Answer: (b)
9. When placed in water, raisins swell up as a result of
(a) Adsorption
(b) Plasmolysis
(c) Endosmosis
(d) Diffusion
Answer: (c)
10. A bottle filled with previously moistened mustard seeds and water was screw-capped tightly and placed in a corner. After 30 minutes, it suddenly blew up. This is the process involved
(a) DPD
(b) Osmosis
(c) Imbibition
(d) Diffusion
Answer: (c)
