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11th Standard English Medium Biology (Botany) Subject Transport in Plants Creative 2 Mark Questions with Solution Part - I

Published on: 26/06/2021

QB365 provides detailed and simple solution for every Creative Questions in class 11 Biology Subject. It will helps to get more idea about question pattern in every Creative questions with solution.

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Std: 11th Standard - Biology

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

Explain Cohesion and Adhesion as explained by transpiration pull theory.

Draw a schematic diagram to show reverse osmosis.

What is Plasmolysis?

What is the significance of imbibition?

Differentiate channel protein and carrier protein.

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Answers Key:

Generic 2

5 x 2 = 10

Water molecules have the strong mutual force of attraction called cohesive force due to which they cannot be easily separated from one another. Further the attraction between a water molecule and the wall of the xylem element is called adhesion.

1. When a plant cell is kept in a hypertonic solution, water leaves the cell due to exosmosis.
2. As a result of water loss, protoplasm shrinks and the cell membrane is pulled away from the cell wall and finally, the cell becomes flaccid. This process is named as plasmolysis

Significance of imbibition:
1. During germination of seeds, imbibition increases the volume of seed enormously and leads to bursting of the seed coat.
2. It helps in the absorption of water by roots at the initial level.

Channel protein and Carrier protein are two types of transport proteins present in cell membrane.

Channel Protein	Carrier Protein
Forms a channel/tunnel in the cell membrane for the easy passage of molecules to enter the cell. Eg: Porin	Acts as a vehicle to carry molecules from outside of the membrane to inside the cell and vice versa. There are 3 types of carrier protein.