Advertisements
Advertisements
प्रश्न
Succulents are known to keep their stomata closed during the day to check transpiration. How do they meet their photosynthetic CO2 requirements?
Advertisements
उत्तर
Succulent (water-storing) plants such as cacti and euphorbias fix CO2 into the organic compounds using PEP carboxylase at night when the stomata are open.
\[\ce{PEP + CO2 -> OAA}\]
\[\ce{OAA ->[Conversion] Malic acid}\]
The. organic compound (malic acid) accumulates throughout the night and is decarboxylated during the day to produce CO2.
APPEARS IN
संबंधित प्रश्न
By looking at a plant externally can you tell whether a plant is C3 or C4? Why and how?
By looking at which internal structure of a plant can you tell whether a plant is C3 or C4? Explain.
RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C4 plants?
Give a comparison between the following:
C3 and C4 pathways
Give comparison between the following:
Anatomy of leaf in C3 and C4 plants
In case of C4 pathway, the first step is
The first stable product of CO2 fixation in sorghum is ______.
PEP is primary CO2 acceptor in ______.
The enzyme that is not found in a C3 plant is ______.
Can girdling experiments be done in monocots? If yes, How? If no, why not?
Some of these terms/chemicals are associated with the C4 cycle. Explain.
Hatch slack pathway
Some of these terms/chemicals are associated with the C4 cycle. Explain.
Bundle sheath cells
In what kind of plants do you come across ‘Kranz’ anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants which lack this anatomy?
A cyclic process is occurring in C3 plant, which is light dependent, and needs O2. This process doesn’t produce energy rather it consumes energy.
- Can you name the given process?
- Is it essential for survival?
- What are the end products of this process?
- Where does it occur?
Name the two important enzymes of C4 pathway, and explain their role in fixing CO2?
Which of the following statements about RuBisCO is true?
