Photosynthesis And Respiration

PHOTOSYNTHESIS

•  It is an anabolic process.
• Carbohydrates are synthesized.
• Light energy is stored in the form of glucose or chemical energy.
• The amount of CO2 in the air decreases during photosynthesis.
• It takes place only in chlorophyllous cells.
• It occurs only in the light.
• The dry weight of the plant increases.
• Photophosphorylation occurs.
• 6CO2+12H2O——–> + sunlight+ chlorophyll+C6H12O6+6O2+6H2O

RESPIRATION

• It is a catabolic process.
• Carbohydrates are oxidized.
• Energy is liberated in the form of ATP.
• The amount of CO2 in the air increases during respiration.
• It takes place in all the living cells, both green and non-green.
• It occurs in light and dark, both conditions.
• The dry weight of plants decreases.
• Oxidative phosphorylation occurs
• O2 is utilized and CO2 and H2O are formed C6H12O6——→6CO2+6H2O+ENERGY

PHOTORESPIRATION

• It takes place only in the presence of light.
• This occurs only in green cells.
• The respiratory substrate in Photorespiration is 2-carbon glycolic acid.
• The respiratory substrate is immediately formed.
• It occurs among chloroplast, cytoplasm, peroxisome, and mitochondria.
• During Photorespiration, hydrogen peroxide( H2O2) is formed.
• ATP molecules are not synthesized.
• NADH is oxidized to NAD+
• The process of transamination occurs during Photorespiration.
• It depends upon O2 concentration and is directly proportional to it.
• Its maximum rate is between 25℃-35℃.

Differences between Respiration and Photosynthesis