Back to AI Flashcard MakerBiology /Biology NEET - XI: Chapter 11- Transport in Plants Part 3

Biology NEET - XI: Chapter 11- Transport in Plants Part 3

Biology27 CardsCreated about 2 months ago

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

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Key Terms

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

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TermDefinition

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