Question
Define osmosis. Explain the difference between active transport and passive transport.
✓
Answer
Osmosis:
Osmosis is the process in which solvent molecules diffuse from higher concentration to lower concentration through a semipermeable membrane.
Osmosis is the process in which solvent molecules diffuse from higher concentration to lower concentration through a semipermeable membrane.
| S.No. | Active Transport | Passive Transport |
| 1. | Energy is expended in this transportation. | This transportation does not require energy. |
| 2. | It acts against the electrochemical concentration gradient. | It operates according to the electrochemical concentration gradient. |
| 3. | This is a living or biochemical process. | This is a kind of physical activity. |
| 4. | This process is accomplished with the help of carriers. | In passive transportation, carriers do not participate. |
| 5. | This is a fast moving process. | This is a relatively slow process. |
| 6. | This method is a selective action used for selected substances. | Generally this is an unselective action. |
| 7. | This is a one-directional process. | Whereas this is a two-way action. |
| 8. | Due to this method, fixed osmotic concentration is maintained in the liquid inside and outside the cell. | It is not helpful in maintaining the osmotic concentration of fluid inside and outside the cell. |
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which one of the plant growth regulators would you use if you are asked to:
- induce rooting in a twig
- quickly ripen a fruit
- delay leaf senescence
- induce growth in axillary buds
- ‘bolt’ a rosette plant
- induce immediate stomatal closure in leaves.
Where is the electron transport system operative in mitochondria? Explain the system highlighting the role of oxygen.
Mention any three similarities and two differences between facilitated diffusion and active transport of substances in plants. Also draw a neat labelled diagram depicting facilitated diffusion of proteins.
Fill in the blanks at (A), (B),(C) and (D).
How are the animals of Arthropoda different from those of Mollusca? Give six points.
Which property of the pigment is responsible for its ability to initiate the process of photosynthesis? Why is the rate of photosynthesis higher in the red and blue regions of the spectrum of light?
What is the commercial source of cork? How is it formed in the plant?
Vikas, student of class XI had interest in physical exercises and he also used to participate in body building competitions. One day, he visited a gym where the gym trainer suggested him to consume muscle building pills available in the market and also gave him a sample of such pills. Vikas showed that sample to his biology teacher who, after examination, found it to be rich in proteins and said him that he should not take them at this age and should consult a doctor before taking anything.
- What are the building blocks of proteins?
- What is the importance of amino acids in an organism?
- What is your opinion about muscle building pills available in the market?
- What values are shown from teachers character?
Give the biochemical events occurring in the root nodule of a pulse plant. What is the end product? What is its fate?
Describe toxicity of micronutrients.