Creating a proton gradient across the thylakoid membrane in higher plants uses cyclic electron flow (CEF), which primarily serves two purposes: (1) producing ATP and balancing the ATP/NADPH energy budget; and (2) defending photosystems I and II from photoinhibition.
ATP and NADPH are produced by noncyclic electron transport. The single product of cyclic electron transport was ATP. Both steps are required by a plant to produce the required amount of ATP for the Calvin Cycle. The electrons are released by photosystem I and then brought back into the system during cyclic photophosphorylation. However, in non-cyclic photophosphorylation, the electrons that the photosystems emit do not come back.
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Answer:
The derived unit of pressure is newton per metre square (Pa). It is a derived unit because it's obtained by adding two or base quantities.
The symbol is Pa and the expression in terms of SI base units is m-¹kgs-²
Pure breeding means the same as selective breeding since you take two animals and combine their traits for certain reasons
