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Give comparison between c3and c4pathwY

Answer» This is also given in NCERT book..
Aap iski table bana le.... Yaha pr muje banana nahi aata isliye mene aise kiya.... Hope u can understand it... ?
C3 pathway..... 1. Photosynthesis occurs in mesophyll cells..... 2. The carbon dioxide accepter is RuBisCO.... 3. Kranz anatomy is absent.... 4. The first stable compound formed is 3 - carbon compound called 3-phospho glyceric acid (3-PGA).....5. The optimum temperature is 20 -25 degree Celsius..... 6. Photorespiratory loss is high..........C4 pathway.... 1. Photosynthesis occurs both in mesophyll and bundle sheath cells...... 2. The carbon dioxide accepter is PEP. carboxylase.... 3. Kranz anatomy is present... 4. The first stable compound is 4 - carbon compound called oxaloacetic acid ( OAA)...... 5. the optimum temperature is 35 - 45 degree Celsius..... 6. Photorespiration does not take place.
\tC3 PlantsC4 PlantsThe primary product obtained is 3- phosphoglyceric acid.The primary product is a 4 carbon compound, oxaloacetate.Occurs in mesophyll cells.Occurs in mesophyll and bundle sheath cells.These can be found in cool and wet areas.\xa0These can be found in dry areas.95% of the green plants are C3 plants.5% of the green plants are C4 plants.The rate of photorespiration is high.Photorespiration is absent.Leaves of these plants show Kranz anatomy.Leaves of these plants do not show Kranz anatomy.Abundant in temperate conditions.Abundant in tropical conditions.Bundle sheath cells do not contain chloroplasts.Bundle sheath cells contain chloroplasts.Carbon dioxide fixation occurs only once.Carbon dioxide fixation occurs twice.All the steps of dark reaction take place in mesophyll cells.The initial steps are carried out in mesophyll cells and the subsequent steps are carried out in bundle-sheath cells.The optimum tem[perature for photosynthesis is very low.The optimum temperature for photosynthesis is high.They have higher amount of crude proteins.They have lesser amount of crude proteins.These evolved 2.5 billion years ago.\xa0Evolved 12 million years ago.Carbon dioxide fixation is slow.Carbon dioxide fixation is faster.Photosynthesis is inhibited when stomata are closed.Photosynthesis occurs even when stomata are closed.\t


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