10 Differences between chemiosmosis in Cellular Respiration and Photosynthesis

Chemiosmosis in Cellular Respiration vs chemiosmosis in Photosynthesis

Chemiosmotic Hypothesis was proposed by Peter Mitchell 1961. He was awarded the Nobel Prize for Chemistry in 1978. This process is occurring during cellular respiration and photosynthesis.

Chemiosmotic Theory states that Electron transport and ATP synthesis are coupled by a proton gradient across the inner mitochondrial membrane.

Peter Mitchell proposed this theory to explain ATP synthesis during cellular respiration

See simple step wise explanation on

Chemiosmosis in Photosynthesis

Chemiosmosis in Cellular Respiration

Chemiosmosis in Cellular Respiration	Chemiosmosis in Photosynthesis
Chemiosmosis in Cellular Respiration occurs in all living cells.	Chemiosmosis in photosynthesis occurs only in green plants and cyanobacteria
Chemiosmosis occurs during Electron transport chain of cellular respiration	Chemiosmosis occurs during Light dependent reaction of photosynthesis
The organelle involved is Mitochondrion	The organelle involved is Chloroplast
The exact site of chemiosmosis is Mitochondrial inner membrane (cristae)	The exact site of chemiosmosis is thylakoid membrane of chloroplast
Electron flows through electron carriers located in the Mitochondrial inner membrane	Electron flows through electron carriers located in the Thylakoid membrane of chloroplast
Proton gradient formation occurs across the mitochondrial inner membrane	Proton gradient formation occurs across thylakoid membrane
Proton (H+) is pumped from matrix into the intermembrane space of mitochondria using energy derived from electron flow	Proton (H+) is pumped from stroma into the thylakoid lumen or thylakoid space using energy derived from electron flow
ATP synthesis occurs towards the matrix side as ATP synthase is oriented towards matrix side	ATP synthesis occurs towards the stromal side as ATP synthase is oriented towards stromal side
Transforms chemical energy or bond energy form food to ATP	Transforms light energy into chemical energy in the form of ATP
ATP synthesized is used to drive all cellular activities	ATP synthesized is used to fix carbondioxide to carbohydrates during light independent reaction of photosynthesis