Biology NEET - XI: Chapter 11- Transport in Plants Part 3
This flashcard deck covers key concepts from Chapter 11 of Biology NEET for Class XI, focusing on the transport mechanisms in plants, including stomatal behavior, water potential, and nutrient transport.
Stomata are absent in
Vallisneria, potamogeton
Key Terms
Stomata are absent in
Vallisneria, potamogeton
Where are cellulose microfibrils located in stomatal apparatus?
In gaurd cells
According to starch sugar interconversion theory, what makes stomata open?
Starch converts to sugar and water moves into gaurd cells from subsidiary cells
According to proton pump hypothesis, what makes stomata open?
Increase in K concentration in gaurd cells
WHat makes stomata close according to proton pump hypothesis?
Abscissic acid acts on gaurd cells and leads to reversal of the reactions that make stomata open
Which light favours the opening of stomata?
Blue light followed by red light
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| Term | Definition |
|---|---|
Stomata are absent in | Vallisneria, potamogeton |
Where are cellulose microfibrils located in stomatal apparatus? | In gaurd cells |
According to starch sugar interconversion theory, what makes stomata open? | Starch converts to sugar and water moves into gaurd cells from subsidiary cells |
According to proton pump hypothesis, what makes stomata open? | Increase in K concentration in gaurd cells |
WHat makes stomata close according to proton pump hypothesis? | Abscissic acid acts on gaurd cells and leads to reversal of the reactions that make stomata open |
Which light favours the opening of stomata? | Blue light followed by red light |
What is the effect of cytokinins on stomata? | Makes stomata open by increasing potassium ion concentration |
What is stomatal index? | The number of stomata per unit area of a leave is defined as stomatal index. |
What happens to the glucose formed in leaves? | It dimerises to form sucrose which is loaded into seive tubes by companion cells. |
What is the tonicity of phloem? | Hypertonic condition |
Which is the only means of gaseous transport within the plant body? | Diffusion |
What do inhibitors of carrier proteins react with? | Protein side chain |
What is the water content of a watermelon? | 92% |
Dry matter of herbaceous plants form how much of the fresh weight? | 10 to 15% |
Water potential is expressed in which units? | Units of pressure (pascals) |
Do the contents of vacuolar sap contribute to solute potential of the cell? | Yes |
What are the two factors on which osmosis depends? | Pressure gradient and concentration gradient |
What is the condition of a cell (flaccid or turgid) kept in an isotonic solution? | Flaccid |
What are the requirements for imbibition? | Water potential gradient between adsorbant and liquid, affinity between adsorbant and liquid |
Is symplastic movement against or along a potential gradient? | Along the potential gradient |
What re-establishes the continuous chains of water molecules in the xylem which often break under tension? | Root pressure |
In how many directions can the root endodermis transport ions? | In one direction only |
Where are mineral ions unloaded in a plant? | Fine nerve endings |
How are mineral ions unloaded in a plant? | By diffusion |
Which elements are actively remobilised? | P, K, N |
Which transport is required to move sucrose from phloem sap into the sink? | Active transport |
How deep is the bark cut out for girdling experiment? | Upto the depth of the phloem |