Similarities Between Cellular Respiration and Photosynthesis
Link: http://www.dwm.ks.edu.tw/bio/activelearner/08/ch8c3.html
Equations for Both
Photosynthesis:
Cellular Respiration:
Structures of Mitochondria and Chloroplasts
 Both oval-shaped
 Have outer and inner membranes
 Membranes surrounded by fluid
o Mitochondria
 Matrix in inner mitochondrial membrane
 Fluid in intermembrane space
o Chloroplast
 Stroma surrounding grana
 Fluid in lumen of thylakoid
 Lumen
o The chloroplast compartment enclosed by the
thylakoid membrane
 Endosymbiotic Theory
o That they both used to be their own organism before they went to live in a
cell
 Their similarity to prokaryotic cells
 Have their own DNA and stuff
Structure of Electron Transport Chain
 Key component in the synthesis of ATP
 Similar coenzymes associated with ETC in both processes
o Cellular respiration
 NAD+
o Photosynthesis
 NADP+
 Is the same as NAD+ (nicotinamide adenine dinucleotide)
but just with a phosphate group added on
 Serves the same function, to carry electrons
Chemicals Found in Both Processes
 When glucose is split in cell respiration, the product (2G3P) is the same as the
two molecules that react to form glucose in the Calvin Cycles of photosynthesis
 The reactants of cellular respiration (carbon dioxide, water, energy) are the
products of photosynthesis and the reactants of photosynthesis (glucose, oxygen)
are the products of cellular respiration
Electron Transport, Chemiosmosis, and Phosphorylation
 In cell respiration, glucose is oxidized and its electrons go to the ETC, while in
photosynthesis, chlorophyll a is oxidized and its electrons go to the ETC
 In both cases, the energy made by electrons going through the ETC is used to
actively pump hydrogen ions across the membrane
 Chemiosmosis happens in both and uses ATP synthase to make ATP