(a(i))[3]
Identify which compounds are W, X and Y.
(a(ii))[2]
State two differences between anaerobic respiration in yeast cells and anaerobic respiration in human muscle cells.
(b)[3]
Dinitrophenol (DNP) is a compound used as a herbicide. DNP reduces respiration by disrupting the formation of the proton gradient between mitochondrial membranes. When DNP was added to isolated mitochondria, the following observations were made: - fewer ATP molecules were produced - more heat energy was released - the uptake of oxygen remained constant Suggest explanations for these observations: - fewer ATP molecules produced - more heat energy released - constant oxygen uptake