Advertisements
Advertisements
प्रश्न
Answer the following question.
In C4 plants, bundle sheath cells carrying out the Calvin cycle are very few in number. Then also, C4 plants are highly productive. Explain.
उत्तर
- C4 plants have a special type of leaf anatomy called Kranz anatomy.
- In C4 plants, CO2 fixation occurs twice.
- In these plants, chloroplasts of mesophyll cells contain the enzyme PEP carboxylase which fixes atmospheric CO2. Thus, first CO2 fixation occurs in mesophyll cells.
- Decarboxylation of malic acid in bundle sheath cells results in an increase in CO2 concentration.
- Thus, RuBisCO acts as carboxylase and brings about carboxylation of RuBP.
- Due to this oxygenation of RuBP and photorespiration is prevented.
Thus, despite of having less number of bundle sheath cells carrying out Calvin cycle, C4 plants are highly productive.
APPEARS IN
संबंधित प्रश्न
The head and tail of chlorophyll are made up of ______.
C4 pathway is also called as dicarboxylation pathway because ______.
Answer the following question.
What are the steps that are common to C3 and C4 photosynthesis?
Answer the following question.
Why are plants that consume more than the usual 18 ATP to produce 1 molecule of glucose favoured in tropical regions?
Answer the following question.
In C-4 plants, why is C-3 pathway operated in bundle sheath cells only?
Answer the following question.
What would have happed if C-4 plants did not have Kranz anatomy?
Answer the following question.
Why does RuBisCO carry out preferentially carboxylation than oxygenation in C4 plants?
Answer the following question.
What is the functional significance of Kranz anatomy?
Correct the pathway and name it.
Where does the conversion of pyruvic acid into phosphoenol pyruvic acid take place?
