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प्रश्न
How phosphorylase enzyme open the stomata in starch sugar interconversion theory?
उत्तर
- The discovery of enzyme phosphorylase in guard cells by Hanes (1940) greatly supports the starch-sugar interconversion theory.
- The enzyme phosphorylase hydrolyses starch into sugar and high PH followed and the opening takes place during the night.
- Day:
- \[\ce{Starch ->[phosphorylase] sugar}\]
- Photosynthesis occur
- pH – increased
- Movement of water from
- subsidiary cells to guard cells
- Guard cells become turgid
- Opening of stomata
- Night:
- \[\ce{Sugar ->[phosphorylase] starch}\]
- No Photosynthesis
- pH – lowered
- Movement of water from guard cells
- Guard cells become flaccid
- Closure of stomata
संबंधित प्रश्न
Multiple Choice Question:
Water movement between the cells is due to ______.
Multiple Choice Question:
Surface tension is due to ____________.
Multiple Choice Question:
Water absorption takes place through ______.
Multiple Choice Question:
Due to low atmospheric pressure the rate of transpiration will ____________.
Why water acts as a thermal buffer?
Why water is called as ‘Elixir of Life’?
In a fully turgid cell
List out the non-photosynthetic parts of a plant that need a supply of sucrose?
An artificial cell made of selectively permeable membrane immersed in a beaker (in the figure). Read the values and answer the following questions?
- Draw an arrow to indicate the direction of water movement.
- Is the solution outside the cell isotonic, hypotonic or hypertonic?
- Is the cell isotonic, hypotonic or hypertonic?
- Will the cell become more flaccid, more turgid or stay in its original size?
- With reference to the artificial cell state, is the process endosmosis or exosmosis? Give reasons.
What is plasticity?
If in a plant cell ψp = 3 bars and its ψs = – 4.5 bars, what will be the resulting ψw?
When a cell is fully turgid which of the following will be zero?
What is called elixir of life?
What makes elixir of life it so important?
